Expedia.com	Orbitz	TripAdvisor	Travelocity
Southwest	American Airlines	XE.com	Delta Air Lines
United Airlines	EasyJet.com	Universal Currency Converter	Cheap Tickets
Marriott International	Continental Airlines	Priceline.com	Ryanair
Northwest Airlines	British Airways	Intercontinental Hotels Group	Japan Airlines
Hilton	Lonely Planet	Venere.com	Hotwire
US Airways	Travelzoo	US State Department, Bureau of Consular Affairs	Iberia
American Express Travel	KLM Royal Dutch Airlines

Siehe auch: Transportation physical distribution | Soziale Kultur | praktische Anfrage