Travelocity:
Various travel resources including a reservations service, destination guides, and special fare bargains.

Yahoo! Travel:
Useful labeled categories and subtopics provide an easy access to all things to all travelers.

Fodor's:
Based on its print counterpart.  The customized 99 vacation destinations are available here.

Amtrak:
Schedules and fares for the  Amtrak rail travel.

Greyhound:
Full bus fare and schedule information on the web.

Practical Travel Resources from the IIP's publication "Information USA"
What to See and Do
How to Get Around and Where to Stay
And more:  Visit FACRS's "Travel in the U.S." section.

Listing of non-government organizations, institutions on this page do not imply USG endorsement of these services or organizations.