M.E.
In addition to entertainment during the flight...one thing I still do with my son is to make sure he gets all the wiggles out before we board the plane. Make the child walks, plays, and runs around after you check in. It's possible to do this without everyone hating you. Of course that means you walk, play, and run around too. Well, maybe you can give your husband this job!! Just kidding. People might look at you a little but they will love you later (besides to heck with what people think).
This worked for my son but I understand that some children get unbearable when they are tired. My son just went to sleep.
Have fun and relax! Remember your child will stress if you stress.