major companies in USA have a "preferred" airlines and a "preferred" booking agents. they do not use every airline available. (major dc located company emplouees ride in UA airplanes, if UA goes there.period)they get discounts and UG's associated with those bookings. these perks are not seen by the peons. bye the way, this every airline in the air, and short haul flights make no sense at all, unless you are consulting to a number of different companies.