11.1 The Travel Distribution Landscape: CRS, GDS, OTAs & Metasearch
Key Takeaways
- An OTA such as Expedia or Booking.com holds the booking and services the customer; metasearch such as Skyscanner or Kayak only compares prices and refers the click onward.
- GDS segment fees are commonly quoted at roughly USD 3-15 per segment, and an average air ticket carries 2.5 to 3 segments, so book-cancel-rebook churn multiplies airline cost.
- Named distribution cost surcharges include Lufthansa Group's EUR 16 per booking from September 2015, British Airways and Iberia's EUR 9.50 from November 2017 and Air France-KLM's EUR 11 from April 2018.
- IATA's NDC scalability study observed look-to-book ratios of about 100:1 to 300:1 on airline websites but commonly above 10,000:1 through OTAs and metasearch engines.
- The billboard effect describes travellers discovering a hotel on an OTA listing and then booking direct, which is why hotels accept OTA commission of roughly 15-25%.
Why Distribution Matters to a Travel Consultant
Distribution is the set of channels through which a supplier's product reaches a traveller, and every link in that chain takes a slice of the price. The Foundation exam tests whether you can name each link and say who holds the booking, who pays whom, and who services the customer when something goes wrong.
The Links in the Chain
1. The supplier's own system: CRS and PSS
An airline's CRS (Computer Reservation System) began life as an internal seat-inventory database. Today it is one module of the PSS (Passenger Service System), which has three classic components:
- Inventory - how many seats remain for sale in each cabin and booking class;
- Reservations - creating, storing and amending the booking record;
- DCS (Departure Control System) - check-in, seat allocation, weight and balance, and boarding.
Named platforms include Amadeus Altea, Sabre SabreSonic and Navitaire New Skies. Accommodation suppliers run the equivalent pair: a PMS (Property Management System) at the property and a chain CRS above it. Rule of thumb: nothing can be sold anywhere that the supplier's own inventory system has not first released.
2. The GDS: the neutral aggregator
A GDS (Global Distribution System) owns no inventory. It assembles schedules (from data houses such as OAG and Cirium), public fares filed through ATPCO (Airline Tariff Publishing Company), and live availability polled from each carrier's CRS, then displays competing suppliers neutrally, side by side. That neutrality - the same display whichever airline you ask about - is the GDS's core commercial proposition.
3. Direct channels
airline.com, the airline app, the call centre, the ATO (airport ticket office) and CTO (city ticket office). No intermediary booking fee is payable and the supplier owns the customer data - which is precisely why suppliers push travellers here.
4. OTA versus metasearch - the classic exam distinction
An OTA (Online Travel Agency) takes the booking itself. Three groups dominate: Expedia Group (Expedia, Hotels.com, Vrbo, Orbitz, Travelocity, trivago), Booking Holdings (Booking.com, Priceline, Agoda, Kayak, OpenTable) and Trip.com Group (Trip.com, Ctrip, Qunar, Skyscanner). An OTA works in one of two models:
- Agency model - it books in the supplier's name, the supplier collects the money and pays the OTA a commission;
- Merchant model - it buys at a confidential net rate, sells at its own retail price, keeps the margin and appears as merchant of record on the traveller's card statement.
A metasearch engine (MSE) compares and refers. Google Flights, Skyscanner, Kayak, momondo and trivago gather prices from OTAs and suppliers, display them side by side, then hand the traveller off to whoever will actually sell. They are paid CPC (cost per click) or CPA (cost per acquisition), not commission on a booking they hold. Two traps: several metasearch brands are owned by OTA groups (Kayak by Booking Holdings, trivago by Expedia Group, Skyscanner bought by Trip.com Group in 2016), and some now bolt a "book on meta" flow onto the comparison. The examinable principle is unchanged - classic metasearch does not hold the booking and does not service it.
| Channel | Holds the booking? | Who pays whom | Who services the customer |
|---|---|---|---|
| Direct (airline.com, app, call centre) | Yes - the supplier | Traveller pays the supplier; no intermediary fee | The supplier |
| GDS | No - it is the pipe; the record sits in the agency PNR and the airline CRS | Airline pays the GDS a segment fee; the GDS pays the agency an incentive | The booking agency, escalating to the airline |
| OTA | Yes - agency or merchant model | Supplier pays commission (agency model) or the OTA keeps the net-to-retail margin (merchant model) | The OTA first; the supplier only once the OTA releases the booking |
| Metasearch | No - it refers the click | The advertiser (OTA, airline, hotel) pays the MSE per click or per acquisition | Whoever the click landed on - never the metasearch |
5. The accommodation-specific links
- Bedbanks and wholesalers (Hotelbeds, WebBeds) contract rooms in bulk at confidential net rates and resell B2B to tour operators, OTAs and agents; those rates are normally meant to be sold only inside a package.
- Channel managers (SiteMinder, RateGain, D-EDGE) push one set of rates and availability from the hotel's PMS out to dozens of OTAs at once, which is what makes parity mechanically possible.
- Switch companies (Pegasus, DerbySoft) translate messages between hotel CRSs and the GDS/OTA world.
- Aggregators and API connectivity - one API into the seller, many suppliers behind it.
The Economics: What a Booking Costs the Supplier
Worked example - an agency books LHR-JFK and JFK-LHR for one passenger. Contract values vary enormously, so treat these as realistic illustrations, not published tariffs.
- GDS segment fee. The GDS bills the airline per segment (one take-off and landing). Industry-quoted values run roughly USD 3-15 per segment, and an average air ticket carries 2.5-3 segments. At USD 5 a segment, this two-segment trip costs the airline USD 10.
- Agency incentive. The GDS returns part of that fee to the agency as a booking incentive - which is why churn (repeated book, cancel, rebook) is expensive for the airline.
- Commission. Since the move to zero base commission (US majors in 2002, most other markets soon after), the airline pays the agent nothing by default. The agency recovers its cost through a service fee charged to the client, or through a negotiated override.
- Distribution cost surcharge. Several carriers now price the indirect channel explicitly. The named, examinable examples are Lufthansa Group's Distribution Cost Charge of EUR 16 per booking from September 2015, British Airways and Iberia's EUR 9.50 from November 2017 and Air France-KLM's EUR 11 per one-way booking from April 2018. Each was paired with incentives or exclusive fares in direct and NDC channels.
Look-to-book ratio is the number of shopping requests a supplier must answer per confirmed booking. IATA's own NDC scalability study observed roughly 100:1 to 300:1 on airline websites, but 1,000:1 at best and commonly above 10,000:1 through OTAs and metasearch. Every look consumes computing capacity the supplier pays for, so shopping volume - not just commission - is now a real distribution cost.
Two Hotel Concepts You Must Be Able to Explain
Rate parity is a contractual commitment to show the same publicly available rate for the same room, dates and conditions across channels. Wide parity covers every channel including the hotel's own website; narrow parity restricts only the hotel's public online rate, leaving it free to discount to loyalty members or in closed groups. Several European competition authorities have restricted wide parity clauses.
The billboard effect is the observed tendency for a property listed on a large OTA to receive more direct bookings, because the OTA acts as a shop window: the traveller discovers the hotel on Booking.com or Expedia, then completes the reservation on the hotel's own site. It is the standard justification for paying OTA commission of roughly 15-25% on part of the inventory.
Where the Consultant Still Adds Value
Disintermediation removed the transaction, not the advice. The consultant's margin now sits in complex multi-sector itineraries, consolidator and net fares, group and MICE work, duty of care, disruption re-accommodation at two in the morning, and simple accountability - a named human who owns the file. Exam trap: "the client booked it on Skyscanner" is always wrong. Skyscanner referred the click; somebody else sold the ticket.
A client compares fares on Skyscanner, clicks through to Expedia and pays there. Two days later the airline cancels the flight. Who holds the booking, and whom should the client contact first?
An airline pays its GDS a segment fee of USD 4. An agency books LHR-DXB-BKK outbound and BKK-DXB-LHR inbound, cancels it, then rebooks the identical itinerary once. Ignoring cancellation charges, what has the airline paid in segment fees?
A 40-room independent hotel lists on Booking.com at 18% commission. Over the following months its revenue manager sees bookings on the hotel's own website rise noticeably. Which concept best explains this?