A flight making at least two (2) stopovers on same trip, example: Dallas to Denver to Chicago to Dallas.

The fare without tax.

Airfare published for travel via two or more carriers.

Computerized Reservation Systems (CRS) or Global Distribution Systems (GDS).

The percentage of tickets issued through an on-line booking system compared to more traditional booking channels.

A flight offered in lieu of a flight that is not available, either because the desired flight was full or not operating.

One of the four major Computerized Reservation Systems (CRS) or Global Distribution Systems (GDS).

Advanced purchase excursion fare, usually seen in international markets,

Airline Reporting Corporation, the agency that regulates ticket sales and reports to the airlines for travel agencies.

The method and date a passenger arrives at a given destination.