Skip to main content

Glossary for the airline industry

Definitions and explanations of common terms in the airline industry


The reservation of a fare or fee product for an itinerary by a customer.

booking code

One or two letters functioning as an inventory control code. Also called the reservation booking designator (RBD) or prime booking code, it specifies the class of service a passenger should be booked in to receive the fare.

Business process outsourcing.
Branded Fares

Product that allows carriers to group and name fares by fare families, fare types, or other criteria and supports ancillary revenue development.


Billing Settlement Plan; the IATA entity responsible for settling funds and reporting accountable information between the travel agency and the airline for fares sold outside the United States, as well as for controlling accountable ticket stock. BSPs are usually organized by country.

BSP method

In coding Category 35, an ATPCO value of 1-5 or blank used to describe to the subscriber which Net Remit Reporting procedure should be used at time of ticketing. The five method types available in Category 35 are based on the seven IATA-established method types.


Banker’s Selling Rate.


See notification. A primary method of communication between ATPCO and customers. Notifications are e-mailed to participants whenever bulletins are posted on the Customer Center extranet site.


As defined by ATPCO, a carrier is generally an airline (scheduled or chartered), but may also be a rail company or car rental company. It is the owner or service provider for a fare and is identified by an industry-standard alphanumeric code.

Carrier-Imposed Fees

A standardized, automated collection, distribution, and pricing method that provides marketing carriers (carriers that appear on the flight coupon) the ability to control and collect fees at the sector (coupon), at the portion of travel (multiple sectors), or on the journey. ATPCO's application handles fuel, insurance, and carrier-imposed miscellaneous fees.


Cost per Average Seat Kilometer. A measure of how expensive it is for airlines to operate any given route. This is calculated by dividing the operating cost per flight by the number of ASKs available on that particular flight. In the United States, CASM (Cost per Average Seat Mile) is used.


Abbreviation for category.


The structure within the Rules system is designed to identify various kinds of restrictive information regarding a fare. Restrictions are listed in the FareManager Rules database and are sorted by various categories of application such as day/time and season of travel.

1 Eligibility
2 Day/Time
3 Seasonality
4 Flight Application
5 Advanced Reservations/Ticketing
6 Minimum Stay
7 Maximum Stay
8 Stopovers
9 Transfers
10 Permitted Combinations
11 Blackout Dates
12 Surcharges
13 Accompanied Travel
14 Travel Restrictions
15 Sales Restrictions
16 Penalties
17 Higher Intermediate Point/Mileage
18 Ticket Endorsements
19 Children Discounts
20 Tour Conductor Discounts
21 Agency Discounts
22 All Other Discounts
23 Miscellaneous Provisions
25 Fare By Rule
26 Groups
27 Tours
28 Visit Another Country
29 Deposits
31 Voluntary Changes
33 Voluntary Refunds
35 Negotiated Fare Restrictions
50 Application and Other Conditions

CCF Subs

An ATPCO data subscription product that provides subscribers with new carrier, city, or fare class codes and multi-airport city relationships to validate before processing fares and related subscription products.

Chart 1

Contains RBD information for the carrier owning the fare (aside from primary RBD) and for secondary carriers participating on the fare. This data provides exceptions to the primary RBD. It is the same as Record 6 Convention 2.

Chart 2

RBD default information for the marketing carrier who is on the ticket but does not own the fare (the fare owner can be a carrier code or YY). Applies for secondary transportation on another carrier's fare, or for primary or secondary transportation on a YY fare. It is the same as Record 6 Convention 1.


A person who has reached his or her second birthday but not his or her twelfth birthday as of the date of commencement of travel from the journey origin.

circle trip
  1. (Two components, Subcategory 102, US/CA Fares) Travel from point A to point B and return to point A using two fare components only. At least one fare component must be priced using half of a round-trip fare. See also combinations.
  2. (More than two components, Subcategory 103, US/CA Fares) Travel on a single pricing unit from a point and return thereto by a continuous, circuitous route, using applicable half-round-trip fares. At least one fare component must be priced using half of a round-trip fare. See also combinations.
  3. (Subcategory 103, International Fares) Travel on a single pricing unit from a point and return thereto by a continuous, circuitous route, using applicable half-round-trip fares. Circle Trip includes pricing units comprising two fare components that do not meet the conditions of the round-trip definition. See also round-trip. See also combinations.

Accompanied child (usually age 2-11)

code share

The practice of putting an airline's flight number on a segment that the airline does not operate with its own aircraft. This allows carriers to sell space on other airlines' flights, expanding a carrier's network.