If you're wider than the seat, you should be looking for flights operated on Airbus equipment if you're stuck in coach. Their narrowbodies are a little wider t

If you're wider than the seat, you should be looking for flights operated on Airbus equipment if you're stuck in coach. Their narrowbodies are a little wider than Boeing's, and you end up with about 1" more of width in a coach seat. You're best off looking at E70/75/90 regional jets (also ~18" wide seats, but 2+2 config) and A319/320/321 mainline. That's probably the biggest reason why JetBlue is an all around more comfortable experience. They fly exclusively A320/321 and E90 aircraft. Yeah they're configured with more legroom than the legacies, but every seat in the fleet is as wide as you'll find in a coach seat.