Some basic definitions Market An origin-destination airport pair, between which passengers wish to fly one-way BOS-ORD and ORD-BOS are different · Itinerary pecific sequence of flight legs on which a passenger travels from their ultimate origin to their ultimate destination Fare Classes Different prices for the same travel service, usually distinguished from one another by the set of restrictions imposed by the airlines 2/212021 Barnhart 1.206J/16.77J/ESD. 15J2/21/2021 Barnhart 1.206J/16.77J/ESD.215J 3 Some Basic Definitions • Market – An origin-destination airport pair, between which passengers wish to fly one-way • BOS-ORD and ORD-BOS are different • Itinerary – A specific sequence of flight legs on which a passenger travels from their ultimate origin to their ultimate destination • Fare Classes – Different prices for the same travel service, usually distinguished from one another by the set of restrictions imposed by the airlines