You shouldn`t have to many problems.
I spent a year commuting from Malaga to the UK on the weekends, that was hard goin, I couldn`t do it for longer, its supprising how kids get confused when one parent isn`t around much.
Its worth getting an access pass to the VIP lounges in the airport, don`t know about barcelona but Malaga flights were delayed reguarly.
You usually see offers in the inflight mag on the plane, cost me about ?50.00 but I saved money as drinks and snacks were free along with TV and newspapers.
Its much more relaxing too.