Many of our cat backpacks are airline and carry-on compliant. Because there are so many airlines, it's impossible for us to confirm if it will be compliant with the one you're flying. For instance, we know “The Fat Cat,” "The Navigator," "The Transpurrter," and The Jackson Galaxy Convertible fly on most airlines. We recommend we check with your airline specifically to see what types of bags they will accept.   To be as helpful as possible, here are some common airlines and their pet policies.