Where can I find cheap flights?

A friend and I are planning on going to London for the 2012 Olympics. We're trying to look up flights now so we can get better rates. The only website I know of that'll find cheap rates is Expedia. Are there any others?Where can I find cheap flights?
http://www.farecompare.com/articles/when鈥?/a>



Please check:

Tips:

a- use flexible dates

b- use alternative airports



http://www.hotwire.com/



http://www.cheapoair.com/



http://www.kayak.com/



http://www.orbitz.com/



http://www.priceline.com/



http://www.expedia.com/default.asp



http://www.bing.com/travel/



http://www.airfarewatchdog.com/



http://www.cheapair.com/
Hi,



Yes, try http://www.doalltravel.com. They're best known for their cheap flights to Israel, but they also have great deals on trips to London and other places as well. You can even get information on car and hotel reservations. I hope that helps you!Where can I find cheap flights?
Try search engines such as www.webjet.co.nz or www.kayak.com that will compile prices from all those site such as Expedia, Travelocity and so forth.
There are a bunch, priceline.com, orbitz.com, and also insanelycheapflights.com