Cheap Exotic Vacations - What web sites are best to find cheap flights to the US?

What web sites are best to find cheap flights to the US?

What web sites are best to find cheap flights from Scotland to the US? Expedia and Opodo are'nt helpful. They only show the big expensive airlines and not the discount ones.

Public Comments

skyauction.com It is able to have amazing deals by selling tickets for soon flights. If you buy something for 2 weeks from now, you can get it for $10! The only catch is that is has to be very soon from now... Not a scam :o)
Try sidestep.com. It displays several comparison flights from different airlines so you won't have to search multiple websites.
Try www.ebookers.com
try ryanair or aerlingus they are cheap to usa you can get some really cheap flights to airports that support these irish airlines
Ken M. Ryan Air does not fly to the US. Maybe you should know what you are talking about before giving people advice.....
www.kayak.com www.sidestep.com www.mobissimo.com That will cover budget and mainstream airlines. Good luck Since you live in Scotland, do you know www.whichbudget.com? It's the best-mostly for European travel though. Check it out.
Hello: You might save time and money by comparing sites at one place...worth trying Go to http://www.grab2travel.com/cheap-flight/deals-on-dates.asp Enter your dates and trip detail. Click on "Search Suggestions" You will get best possible suggested sites to compare rates from one place. I liked it. Also you can check in forum http://forums.grab2travel.com Try to look for promotion codes/special deals under http://www.grab2travel.com/cheap-flight/cheap-flight-deals.asp
try icelolly.com i found a flight from manchester to montego bay for £235 almost £150 cheaper than a previous flight i bought