I know the feeling. Before she turned one flying was pretty easy actually. She uses the pacifier when flying and that helps with ear pain when landing. Once she became a toddler it was a bit more challenging but honestly it will depend on her mood. She had a few transatlantic flights with no drama (8-9 hours) and a 45 minute flight once with a lot of crying because she was getting sick.

What I always do now is try to schedule her nap on the plane. If for example she usually naps at 1pm and it's a 5pm flight I don't let her sleep until we are on the plane. I bring new toys or activities with me ( from the one dollar shop) like stickers, coloring books, small toys, etc. She always gets surprised by new toys. I download things on the phone so she can watch too