We have collected a trusted list of links for your convenience. One of the best ways to get the best flights and hotel rates is to use a Travel search site that checks the latest rates from all the airlines and wholesalers.
Check these two:
Sidestep
Kayak
Quocodile

These sites consistently come up with the largest variety and best prices. You should also look at the airline sites as they often guarantee the lowest fare if you book direct.
Sidestep.com
Kayak.com
Orbitz.com
Expedia.com
Travelocity.com