Summer airfare websites? deals?

I need to get 3 ppl to Spain in July. The familia isn't getting any younger-- need to visit. What are your fav websites for airfare deals? Thanks for any suggestions.

I have been watching airfares for summer for a couple years now. I like Kayak. I know others use airfare watchdog (or something like that) The flights seem to be in the $1200-$1500 range for me from Detroit. I am waiting for a deal. Sometimes orbitz has pretty good prices, too. Good luck and keep us posted.

TRavelocity matching fares sometimes is good too.

Plus to Travelocity is if you plug in your parameters they will email you each time a seat price drops by $25.