Travelocity, for one, allows a buyer outside the U.S. or Canada to have any flight booking sent to a travel agent anywhere -- so long as he is a Sabre reservations system user -- to have the purchased ticket issued.

CNN: Technology: Flight Planning 101

American's reservations system is hosted by Sabre Holdings Corp.

WSJ: Delays Hit 1,300 American Airlines Flights

American Airlines, owned by parent AMR Corporation, has picked up an antitrust battle against Sabre Holdings, a global distribution system that provides flight data to third-party ticket agents and websites, saying its business practices are anti-competitive and not in the interest of the consumer.

FORBES: American Airlines Renews Antitrust Battle; Down 3% After Hours

Yesterday the court approved a temporary restraining order that prohibits Sabre from disfavoring American flight results in its large overall system, which provides data to travel agents and corporate clients around the world.

FORBES: American Airlines Plays it Tough with Global Distributors

American said that the problem wasn't with Sabre, but rather the carrier's ability to access the system.

WSJ: Delays Hit 1,300 American Airlines Flights