Here are some excerpts from Silflay's post:
That being said, my latest website for the best ticket prices is CheapoAir.com. The site promises to save 65% off published fares. I'm not good at math and I'm sure exactly what the published fares might be since there are so many out there, but the site did save me about $50 bucks over Yahoo Travel, the next best rate I could find. Yahoo in turn saved me about $50 bucks over Expedia, which saved me $15 to $20 bucks over several other sites like Orbitz.
Check out Silfay's Blog.