Same at BHX looking at the one way fare on the 1st - but I'd be a bit worried if they weren't nearly sold out as it's the start of the Easter holidays and it should be a very busy Saturday at all airports!
Fares into May and June BHX-AGA are very cheap right now though - like anything with FR, they'll operate a route as long as it suits them (or any financial incentives involved run out!)