Originally Posted by
angatol
Try here:
http://matrix.itasoftware.com/ I just tried a random date, and the cheapest flight was on AF (though one leg operated by flybe) and it had a Saturday night stay requirement.
I don't know how good AF are, but if they're an option it is probably better than the organisation best known as "Flymaybe", unless they have seriously improved their on-time performance.
Neil