Just found out about Adioso. It knows about much more airlines (at least for the region I'm in) than say, Hipmunk, but it then asks to book each leg separately.

Just found out about Adioso. It knows about much more airlines (at least for the region I'm in) than say, Hipmunk, but it then asks to book each leg separately. I wonder if it's ever possible to have integrated flight booking with arbitrage.