Check out these TRAVEL AGGREGATOR sites the next time you are online looking for travel tickets:

http://qixo.com/

QIXO searches more than 28 popular airfare sites and finds you the best prices and flight times.

http://mobissimo.com/
Mobissimo performs real-time queries of the multiple websites that travelers traditionally check manually (plus dozens of others that are often overlooked).

http://kayak.com/
KAYAK objectively and comprehensively navigates travel information online by searching for travel deals from over 100 online travel sites.