The first 10ish minutes didn't have me expecting good things for the rest of the runtime, but I think this gets more enjoyable as it goes along, and Hartnett is fun in the role.

It had a nice forward energy to it, propulsive music, entertaining fight sequences, and the supporting cast on the plane ranges from solid to actually pretty good. I found the non-plane scenes rather meh, but they're mostly just connective tissue for bloody hijinks on a double decker plane full of cannon fodder. Hartnett is both amusing and sympathetic, and I would happily watch more of his shenanigans in a hypothetical sequel.