Are there budget airlines for travel within the UK?

Hi, my friend and I are planning a trip to Scotland in August of 2007 and we are starting to look into airfare. We will be flying out of Chicago O'hare International airport. Prices into Glasgow or (preferably) Edinburgh are way higher than into London Heathrow. My question is: if we can get a sweet deal into London, are there some budget airlines with great prices between London and Edinburgh? Thanks - and if there are budget airlines, could you please provide their websites or a link... Thanks!! :-)

easyjet

ryanair, easyjet, flybe,

Sure .... some are listed above.

If you're coming from overseas use the major local websites to back up your research. I've listed a few sites to make your trip interesting and ways to save you money: