A beginner's guide to how airlines turn seats into revenue: pricing, distribution, sales, e-commerce, payment, partnerships and marketing.
At most airlines, "Commercial" is the name for everything between a seat existing and a customer paying for it: what the product is, how it is priced, where it is sold, who sells it, how the money comes in, and what happens when the customer needs something afterwards. NP 101 covers which seats exist, RM 101 how many to sell at each price, and Loyalty 101 why customers come back. This page covers the rest of the machine, in the same spirit: the key ideas, a few worked examples, and as little jargon as I can get away with. It describes the industry in general, not how any particular airline does things, and every number in the examples is made up for illustration.
An airline can have the best network, the smartest RM system and the most generous loyalty program in its market and still lose money, if its fares are not visible where customers shop, if every sale costs too much to make, or if the cash arrives late and leaks away in fees and fraud. Commercial is the function that makes sure the revenue the planners and RM analysts imagine actually shows up in the bank.
It is also where the airline meets everyone else. Commercial teams negotiate with global distribution systems, travel agencies, corporate buyers, banks, card networks and partner airlines. Much of the job is about those relationships and who captures how much of each fare along the way.
Organization charts differ a lot between airlines, but most commercial divisions contain some version of the following teams, often reporting to a Chief Commercial Officer:
| Team | Main question | Chapter |
|---|---|---|
| Network planning | Where do we fly, when, with what? | NP 101 |
| Pricing | What fares and rules do we publish? | 01 |
| Revenue management | Which of those fares are open right now? | RM 101 |
| Distribution | Through which channels, at what cost? | 02–04 |
| Sales | Which corporate clients and agencies do we win? | 05 |
| E-commerce & digital | How well does our own website and app sell? | 06–07 |
| Payments | How do we collect cash cheaply and safely? | 08 |
| Alliances & partnerships | Whose flights do we sell, and who sells ours? | 09 |
| Marketing & loyalty | Why should anyone choose us? | 10, Loyalty 101 |
Before anything can be sold, it has to be defined. The physical product is the flight: a schedule, an aircraft, a cabin. The commercial product is what the customer buys on top: which cabin, which conditions, which extras. And before anything can be sold, the price has to exist somewhere a seller can find it.
The two are often confused, and they work together closely, but they answer different questions. Pricing decides the menu: the fare levels on each route, and the rules attached to each one. RM decides, flight by flight and day by day, which items on that menu are available. Pricing analysts watch competitors, file new fares and run sales; RM analysts manage the opening and closing of fare classes (RM 101, Chapter 01). A fare that pricing never filed cannot be sold, however much RM would like to open it.
Most published airline fares travel through one company: ATPCO, the Airline Tariff Publishing Company, founded in 1965 and owned by a group of airlines. Airlines file their fares and rules with ATPCO, which distributes them to the global distribution systems, airline reservation systems and online agencies that need to price tickets. It supplies the overwhelming majority of the industry's intermediated fare data, and handles millions of fare changes every day.
A filed fare is not just a price. It is a price plus a set of rules, organized in numbered categories that every pricing engine understands:
| Category | What it controls | Example |
|---|---|---|
| Cat 3 Seasonality | When travel is allowed | Valid for travel 1 Nov to 15 Dec |
| Cat 5 Advance reservations | How early you must book | Book at least 14 days before departure |
| Cat 6 / 7 Minimum / maximum stay | Length of the trip | Saturday night stay required |
| Cat 11 Blackout dates | Dates the fare cannot be used | Not valid over the holidays |
| Cat 16 Penalties | Changes and refunds | Changes for a fee, non-refundable |
| Cat 35 Negotiated fares | Private fares for specific agencies or clients | Corporate or tour-operator fares |
These rules are the price fences of RM 101, Chapter 01, written in a machine-readable form. They are also why airline pricing is so hard to change quickly: a new product idea has to be expressed in a rule language designed decades ago, and every system downstream has to interpret it the same way.
Over the last fifteen years most airlines moved from selling a list of fare classes to selling a small number of fare families, each with a name and a clear bundle of what is included. The customer no longer compares Q to M; they compare "Basic" to "Standard" to "Flex".
| Fare family | Typical content | Aimed at |
|---|---|---|
| Basic | Seat only, no changes, seat assigned at check-in, carry-on only | Price-driven leisure |
| Standard | Seat selection, changes for a fee, one checked bag on some routes | The mainstream traveler |
| Flex | Free changes, refundable or partially refundable, extra loyalty earn | Business and uncertain plans |
| Premium cabins | Different seat, lounge, priority services | Comfort and status |
Branded fares do two things at once. They make the choice easier to understand, and they turn the price gap between families into a clear upsell: "for $40 more, you get a bag and a seat". A well-designed family ladder can move a meaningful share of customers one step up, which is revenue that no RM control alone would have captured.
Airline distribution was built for a world of travel agents, and the architecture still shows it. Understanding it starts with one system.
In the 1950s, making an airline reservation involved index cards, phone calls and a lot of manual counting. American Airlines and IBM set out to fix that, and the resulting system, SABRE, was fully operational by 1964. It kept track of seat inventory in real time and was one of the first large commercial uses of computers anywhere. Other airlines built their own reservation systems, and in 1976 SABRE was installed in a travel agency for the first time. Agents could now see and book airline inventory directly.
Those airline-owned systems grew into global distribution systems (GDS): shared marketplaces that connect hundreds of airlines to hundreds of thousands of travel agents. Today three dominate: Amadeus (founded in 1987 by four European airlines), Sabre, and Travelport. The airlines that created them eventually sold them, and the GDSs became independent, powerful intermediaries in their own right.
Selling a ticket through a GDS involves four separate steps, each handled by a different piece of the system:
| Step | What happens | Where the data comes from |
|---|---|---|
| Schedule | Which flights exist between two cities | The airline's published schedule |
| Availability | Which booking classes are open on each flight | The airline's inventory, driven by RM |
| Pricing | Which fare applies to that itinerary and those classes | Fares and rules filed via ATPCO |
| Booking & ticketing | A reservation (PNR) is created, then a ticket is issued against it | The airline's reservation system and the GDS |
The PNR (Passenger Name Record) holds who is traveling, on which flights, with what contact details. The ticket is the separate financial document that proves the passenger has paid and entitles them to fly. Paper tickets disappeared when IATA moved the industry to 100% electronic ticketing on 1 June 2008; IATA estimated the switch saved the industry about $3 billion.
A channel is a path through which a ticket gets sold. Each one reaches a different kind of customer and takes a different cut of the fare.
| Channel | Who uses it | Trade-off |
|---|---|---|
| Airline website & app | Loyal and price-aware customers | + Cheapest, full control, customer data − Only reaches people who come to you |
| Metasearch | Comparison shoppers (Google Flights, Skyscanner, Kayak) | + Huge reach, sends traffic to your site − Pay per click or per booking; you compete side by side |
| Online travel agency (OTA) | Leisure travelers shopping across airlines and hotels | + Reach, especially in markets where you are small − GDS fees and incentives; the OTA owns the customer relationship |
| Travel management company (TMC) | Corporate travelers | + Access to managed business travel, high yields − Most expensive path; dependent on corporate deals |
| Traditional agency | Groups, complex trips, markets with low online use | + Reach and service for complex bookings − Cost and limited merchandising |
| Contact centre & airport | Changes, complex cases, last-minute sales | + Service − Expensive per transaction |
The cost of sale is everything the airline pays to turn a customer's intent into cash: GDS or aggregator fees, agency commissions and incentives, metasearch referral fees, payment costs, and its own technology. It varies enormously by channel.
A few dollars per ticket sounds small until it is multiplied by tens of millions of passengers. Moving five percent of a large airline's sales from its most expensive channel to its cheapest can be worth tens of millions a year, with no change to the product at all.
For decades, airlines paid travel agents a commission on every ticket, typically a percentage of the fare. As online booking grew, carriers cut and capped those commissions, and in March 2002 Delta eliminated base commissions for tickets sold in the United States and Canada, and most other large US carriers soon followed. Agencies moved to charging service fees to their clients and to earning incentives from airlines for hitting volume targets instead.
The next battle was over GDS fees. On 1 September 2015, the Lufthansa Group began adding a €16 Distribution Cost Charge to tickets booked through a GDS, while its own websites, airport counters and its direct agency portal were exempt. It was a public signal that the airline wanted agencies to move to direct connections, and several other airline groups have since introduced their own surcharges or content differences between channels.
The GDS model has one deep limitation: the airline does not build the offer. The agency screen assembles it from filed fares, published availability and schedules. That makes it hard to sell anything that doesn't fit the old structure: a bundle, a dynamic price, a personalized offer, a seat with a picture of what you're buying.
IATA adopted Resolution 787 in October 2012, launching the New Distribution Capability (NDC). NDC is a data standard that lets an agency, or an aggregator acting for many agencies, ask the airline directly for an offer. Instead of the channel constructing the price from filed components, the airline's own system responds with a complete, priced offer: flights, fare, bundle and ancillaries, possibly tailored to who is asking.
| Traditional GDS (EDIFACT) | NDC | |
|---|---|---|
| Who builds the offer | The GDS, from filed fares and availability | The airline, in real time |
| Ancillaries | Limited, often sold separately | Part of the offer |
| Rich content | Text codes | Descriptions, images, product attributes |
| Pricing | Limited to filed fare levels | Can be continuous or personalized |
| Record | PNR plus ticket plus separate documents | Moving towards a single Order |
NDC fixes how the product is offered. The next step fixes how it is recorded. Today a single trip can generate a PNR, a ticket, and several electronic miscellaneous documents (EMDs) for bags and seats, each processed by different systems. IATA's ONE Order program aims to replace all of them with a single customer order, the way any online retailer records a purchase. The broader move is often called Offers and Orders, or modern airline retailing, and it is the plumbing that the total offer optimization of RM 101, Chapter 08 needs.
Sales is the part of Commercial that deals with the customers who don't book one ticket at a time: corporations, travel agencies, tour operators, groups. It is a relationship business built on negotiated deals, and it is where a large share of high-yield revenue comes from.
A large company may spend tens of millions a year on air travel. Its travel manager negotiates with airlines for discounts, waived fees or other benefits in exchange for directing a share of its travel to them. A typical corporate deal says: we will give you a discount on these routes and these fare families, as long as you give us at least a given share of your travel in those markets. The airline's side of the question is always the same: is the discount paying for extra traffic, or am I discounting travel I would have got anyway? That is the incrementality problem from Loyalty 101, Chapter 09, in a different setting.
To judge whether a client or a market is performing, airlines compare the share of traffic they actually get against the share they "should" get given their schedule. The expected share comes from a Quality of Service Index (QSI), a model that scores each airline's itineraries by frequency, nonstop versus connection, departure times, elapsed time and aircraft.
Airlines sign incentive agreements with major agencies and TMCs, paying bonuses for growing their share or hitting revenue targets. Tour operators buy seats, often in blocks, to package with hotels. In markets where an airline has no local office, it often appoints a General Sales Agent (GSA) to represent and sell it for a commission. And the point of sale, the country where a ticket is sold, matters: the same flight can be priced differently in Toronto and in Paris, because the competition and the customer are different in each.
The airline's own website and app are its cheapest and most controllable channel, and for many airlines the largest. They are also a retail business with its own discipline: traffic, conversion, basket size, and the constant tuning of an online store.
Airline shopping is extremely search-heavy. Customers search many dates and routes before buying, and machines search even more on behalf of metasearch and agency sites. The ratio of searches to bookings, the look-to-book ratio, can easily run into the hundreds or thousands across all channels, and every search costs computing power. On the airline's own site, the path from search to booking is a funnel where every step loses people.
Each drop-off is a question. Did people leave the results page because the price was wrong, or because the page was slow? Did they abandon at payment because their card was declined or because a surprise fee appeared? E-commerce teams answer these with analytics and A/B tests: show half the visitors one version of a page and half another, and measure which converts better.
Visitors reach the site through a mix of paths: typing the airline's name, search engine results (paid and unpaid), metasearch referrals, emails, and the app. Each path has a cost, and the mix matters. A customer who opens the app directly costs almost nothing to acquire; one who clicks a metasearch ad costs a referral fee every time. The loyalty program (Loyalty 101) is one of the most powerful tools for pulling customers into the cheapest paths, because members have a reason to log in and book direct.
Direct channels know more about the customer than any other channel: whether they are logged in, their status, their past trips, what they searched yesterday. That knowledge can shape what they see: which fare family is highlighted, which ancillary is offered first, which destination appears on the homepage. Done well, it makes the store easier to use and raises revenue. Done badly, it feels intrusive or unfair, which is why most airlines are careful to personalize the offer and the presentation long before they touch the price.
Ancillary revenue is everything an airline sells beyond the base fare: bags, seats, priority boarding, lounge access, Wi-Fi, upgrades, and commissions on hotels, cars and insurance. CarTrawler and IdeaWorksCompany projected airline ancillary revenue at $148.4 billion worldwide for 2024, up from about $118 billion in 2023. RM 101, Chapter 08 tells the story of unbundling; here the focus is on how the selling works.
| Type | Examples | Commercial logic |
|---|---|---|
| Unbundled services | Checked bags, seat selection, changes | Charge those who value it; keep the headline fare low |
| Upsell | Fare family step-up, extra legroom, paid upgrade | Sell a better version of what they are already buying |
| Convenience | Priority boarding, fast track, lounge pass, Wi-Fi | Sell time and comfort at the moment it matters |
| Third party | Hotels, cars, insurance, transfers | Earn a commission on the rest of the trip |
| Loyalty | Points purchases, co-brand card sign-ups | See Loyalty 101 |
Selling ancillaries is less about the price list and more about the moment. The same seat upgrade sells very differently when offered during booking, in a pre-trip email, at check-in, or at the gate. Merchandising teams design that sequence, decide which offers appear together, and increasingly price them dynamically: an extra-legroom seat on a nearly full long-haul flight is worth more than the same seat on a half-empty short one.
In the indirect channel, ancillaries have historically been hard to sell because the GDS could not display them well; that is one of the strongest arguments for NDC. Behind the scenes, most are still recorded as EMDs, electronic miscellaneous documents that sit alongside the ticket.
Payment is the least glamorous part of Commercial and one of the most expensive. Every sale has to be collected, in dozens of currencies and payment methods, often months before the airline delivers anything, and the cost of getting it wrong shows up as fees, fraud and failed bookings.
When a customer pays by card on the airline's site, the airline is the merchant. Its bank, the acquirer, sends the request through the card network to the customer's bank, the issuer, which approves or declines it. Each party takes a share: the issuer's interchange fee, the network's scheme fees, and the acquirer's margin, together often called the merchant discount rate. Premium and corporate cards, and cards issued in another country than where the sale happens, usually cost more to accept.
Sell now, deliver later. An airline takes the customer's money weeks or months before the flight. If the airline stops flying before then, the card issuer may have to refund the customer. That is why card acquirers treat airlines as high-risk merchants and may hold back part of the cash until the flights have flown, especially when the airline is financially weak.
Fraud. Airline tickets are an attractive target for stolen cards: they are valuable, easy to resell and consumed quickly. Airlines screen transactions with risk scoring, and use strong customer authentication (such as 3-D Secure) where regulation requires it or the risk is high. Every rule that blocks a fraudster also blocks some genuine customers, so fraud teams tune a trade-off between losses and lost sales.
Chargebacks. A customer can dispute a card transaction with their bank. The airline then has to prove the service was delivered, or refund. Flight disruptions can trigger waves of them.
Local payment methods. Cards are not how everyone pays. Bank transfers, digital wallets and national schemes dominate in many countries, and "buy now, pay later" has become common for leisure travel. Supporting the methods customers expect in each point of sale is one of the simplest ways to raise conversion.
When a travel agency sells a ticket, the money usually flows through a settlement system rather than a card network. In most of the world it is IATA's Billing and Settlement Plan (BSP), and in the United States the Airlines Reporting Corporation (ARC). The agency reports its sales for a period, the system nets out what each agency owes each airline (minus any commissions), and settles it in one payment. It spares thousands of agencies and airlines from invoicing each other individually, and it is one of the quiet pieces of infrastructure that makes indirect distribution possible.
NP 101, Chapter 09 explains the partnership ladder from a network point of view: interline, codeshare, alliance, joint venture. The commercial questions are different: who sells the seat, who gets which part of the fare, and how the customer experiences a trip on two airlines as one.
On an interline itinerary, one airline sells a ticket that includes a flight on another. The customer pays one fare, and the airlines then have to split it. That split is called proration. The default rules, set through IATA, share the fare in proportion to each segment's weight, which is based on distance but adjusted so that short sectors get somewhat more than their pure mileage share. Partners often override the default with bilateral special prorate agreements (SPAs).
On a codeshare flight, one airline operates the aircraft (the operating carrier) and one or more partners sell seats on it under their own flight numbers (the marketing carriers). For the marketing carrier, it adds destinations to its shop window without flying there; for the operating carrier, it adds sales power in the partner's home market. Commercially, codeshares come in two main flavours: free-sale, where the marketing carrier sells from the operator's inventory and the revenue is shared by prorate, and block space, where the marketing carrier buys a fixed number of seats and takes the risk of selling them.
An alliance adds a common customer promise: reciprocal loyalty earning and status recognition, lounge access, through check-in, coordinated connections. A joint venture goes further. On a defined set of routes, usually long-haul corridors, partners plan capacity together, price and sell each other's flights as if they were one airline, and share the combined revenue or profit according to a formula. Because that is close to a merger, it usually needs antitrust immunity from competition regulators. The commercial payoff is that the partners stop competing with each other on the corridor, and every sales team sells the whole joint network.
Airline marketing works on two time horizons. Brand marketing is slow: it shapes what people think of the airline, which matters every time they choose between two similar flights at similar prices. Performance marketing is fast: search ads, metasearch bids, social campaigns and emails that aim to produce a booking this week, measured by what they cost per booking.
Airlines position themselves along a few dimensions: price (low-cost versus full-service), network (the national carrier, the hub of choice), and experience (premium cabins, service, reliability). A strong brand earns a price premium: customers are willing to pay a little more, or to accept a slightly worse schedule, to fly with you. It shows up in the fair share index of Chapter 05 as a share above what the schedule alone would predict.
The hard problem in performance marketing is attribution: when a customer saw a social ad, clicked a search ad a week later, and finally booked from an email, which one caused the booking? Simple rules (credit the last click) overvalue channels that catch customers who were already about to buy. Better approaches run controlled experiments, turning a campaign off in some regions or for a random group of customers and measuring the difference. It is the same incrementality logic as in loyalty and corporate sales, and it is the only reliable way to know which marketing dollars actually work.
Customer relationship management (CRM) uses what the airline knows about its customers to talk to them one by one: a reminder when a fare to a city they searched drops, an upgrade offer before a long flight, a win-back campaign for someone who stopped flying. The loyalty program is the backbone of it, because it is the reason customers identify themselves. Loyalty 101, Chapter 08 covers segmentation and lifetime value in more depth.
A newer idea is to sell access to the airline's audience to other brands. In June 2024 United launched Kinective Media, which it described as the airline industry's first media network, using its app, website and seatback screens to show targeted advertising. The logic is the same as retail media at big retailers: travelers are a valuable audience, and the airline knows a lot about where they are going.
For most retailers, the sale is the end of the transaction. For an airline it is the start: between booking and flying, customers change dates, add bags, ask for refunds, and, when things go wrong, need to be rebooked. How well the airline handles this servicing shapes whether the customer comes back, and it costs real money.
When a customer changes their trip, the new itinerary has to be repriced under the rules of the original fare (Cat 16 in Chapter 01), any difference collected or refunded, and the ticket reissued. It is one of the most complex operations in airline IT, especially for tickets sold by agencies, and one of the reasons servicing is the hardest part of NDC to get right.
When a flight is cancelled or badly delayed, the airline has to reaccommodate every affected passenger, ideally automatically, before they reach a counter. The commercial side of this is about priorities (who gets the last seats on the next flight: the connecting business traveler, the family, the top-tier member?), about cost (hotels, meals, rebooking on other airlines), and about regulation.
| Region | Framework | Main idea |
|---|---|---|
| European Union | Regulation (EC) 261/2004 | Care, rerouting or refund, plus fixed compensation for long delays and cancellations within the airline's control |
| Canada | Air Passenger Protection Regulations (in force in phases in 2019, since amended) | Similar obligations, with compensation that depends on the airline's size and the length of the delay |
| United States | DOT consumer rules | Focus on refunds when flights are cancelled or significantly changed |
These rules turn disruption into a direct cost line, which is why commercial and operations teams increasingly work together on recovery (see OR 101, Chapter 09).
Every change handled in the app instead of by a contact centre agent saves money and, usually, frustrates the customer less. Much of an airline's digital investment goes into making changes, refunds, rebooking and seat selection work without a human, and into giving agents better tools for the cases that still need one.
Commercial performance is tracked with a handful of metrics that every airline uses in some form. The unit metrics of NP 101, Chapter 02 measure how well the network earns; the ones below add how well it sells.
| Metric | Definition | What it tells you |
|---|---|---|
| PRASM / RASK | Passenger revenue per available seat mile (or km) | Overall commercial productivity of the capacity |
| Yield | Revenue per revenue passenger mile | Average price paid, adjusted for distance |
| Load factor | Share of seats filled | Volume; combined with yield it gives PRASM |
| Fair share index | Actual share / QSI share | Commercial strength beyond the schedule |
| Ancillary revenue per passenger | Ancillary revenue / passengers | Merchandising performance |
| Direct share | Share of revenue sold through own channels | Channel strategy and loyalty engagement |
| Cost of sale | Distribution + payment + commission costs / revenue | How much of each dollar reaches the airline |
| Conversion rate | Bookings / sessions or searches | E-commerce performance |
| NPS | Share of promoters minus share of detractors | Whether customers would recommend you |
Airline commercial is in the middle of the biggest change in how it sells since the GDS. A few directions stand out.
Offers and orders, dynamic pricing and rich content all push in the same direction: airlines building and selling their own products the way other retailers do, instead of filing components for others to assemble. The technology is arriving slowly, but the destination is clear, and it changes the job of every commercial team. Pricing, RM and merchandising start to look like one function.
Airlines know more about their customers than almost any retailer, and they will use it more: tailored bundles, relevant ancillaries, better servicing. The limits are trust and regulation. Personalizing the offer is widely accepted; personalizing the price is not, and the industry is feeling its way along that line.
Customers are starting to plan and book trips through AI assistants rather than search boxes. If an assistant, not a person, compares the options, the airline's product has to be described in data that a machine can read and compare, and distribution may shift once again to whoever controls that assistant.
Account-to-account payments, digital wallets and local instant payment schemes are growing fast. For airlines, they can mean lower acceptance costs and faster cash, if they can be offered without adding friction.
Anyway, that's the overview. If something here was unclear or you want to go deeper on any chapter, feel free to reach out. I find this stuff genuinely fascinating, and I'm always happy to talk about it.
ATPCO: Wikipedia, ATPCO.
SABRE: Computer History Museum, SABRE; Wikipedia, Sabre Corporation.
Amadeus: Wikipedia, Amadeus IT Group.
100% e-ticketing: Wikipedia, Electronic ticket.
Delta and agent commissions: CNN Money, "Delta halts travel agent commissions", March 2002.
Lufthansa Group Distribution Cost Charge: Travel Weekly, "Lufthansa to add surcharge for GDS bookings", 2015.
NDC and Resolution 787: IATA, Distribution with Offers & Orders.
Ancillary revenue: IdeaWorksCompany and CarTrawler, 2024 worldwide estimate.
Kinective Media: United Airlines press release, June 2024.
Canadian passenger rights: Canadian Transportation Agency, Air Passenger Protection Regulations.