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Term Definition
Y Booking class - use varies depending upon airline
Y-Up coach fare that immediately allows passenger to book First seat
Yaw aircraft angle of rotation about vertical axis or motion about that axis; moves nose left or right
YGM Internet lingo meaning "You've got mail"
YGPM You've Got Private Mail.
YIELD MANAGEMENT The process whereby airlines allocate seats at different prices depending on actual vs. anticipated demand. Yield management also pertains to the process of allocating frequent flyer award seats.
YM Yield Management (obsolete, now called Revenue Management or RM)
YMMV Your Mileage May Vary.
YQ Fuel surcharge
YRT TypicalFare Basis Codefor a full-fare ticket with a 1-year validity
YV Mesa Airlines
YX Midwest Express