Internet Travel Network - Airline tickets, travel reservations and booking with real time flight availabilities. Also hotel reservations and car rentals.
Travelocity - buy airline tickets, get details on worldwide destinations, browse through interests ranging from restaurants and concerts to golf courses and theater. Purchase products and share experiences via chats and bulletin boards.
easySABRE - offers access to airline, car rental and hotel information in a command-driven (ASCII) interface. book your airline reservations for free.
PCTravel - Real-time airline reservations and tickets for Web users. Tickets are delivered overnight, free in the U.S. No fees.
Air Ticket Consolidators and Bucket Shops - introduction to international airline ticket discounting and discounters, by an inside expert and specialist in around-the-world airfares.

Online Booking - Rail

Online Booking - Cruises

Online Booking - Lodging