Last week, I flew from Nimes to London Luton on Ryanair. I've seen lots of complaints here about these folks, but my experience was just fine. The main things to watch for with Ryanair are the actual location of the airport and the baggage allowance. The locations are sometimes far from the cities they "serve" (in my case, though, Nimes was very convenient).

Also, I had to pay about 60 euros for my excess baggage. I wasn't really traveling that heavy, but I knew that was the deal going in.

The flight itself was similar to a Southwest flight, except that you have to pay for anything you want -- even soda and coffee.

So...I recommend Ryanair IF the price is right after you account for ground transportation and baggage charges.