I've gotten some really good deals on Aer Lingus, even for my one-way ticket home in June -- I think the total cost was about £220. But they can sometimes be pricey for return fares, especially during peak season
![Undecided :-\\\\](https://www.talk.uk-yankee.com/Smileys/classic/undecided.gif)
BMI is another good carrier to check. I've been pretty happy with their service, overall.