If you're going overseas the deadline is 32 weeks and some airlines require a doctors note.
within the US each airline has a different policy and most require a doctor's note after 36 weeks. It's best to call the airline or check their policy on the internet
Depends on your situation.
Most airlines require a note after 37 weeks.
Depending on the length of the flight the Dr may recommend baby asprin to avert blood clots. I suggest you sit by the isle so you can get up once in a while & you don't disrupt the person next to you if you frequently have to use the bathroom.
It's different b with every situation. Many times it's just the tail end of your pregnancy and the airline may even need a Dr note saying it's ok for you to fly. Talk to your ob. Also, there is a crackdown on posts to keep on product topic. If your post is moved, don't take it personally. They are just trying to help you find the group that will have the most insight to your questions.
You can go to the pregnancy forum they will probably have an answer for that I'd answer but i dont have a clue lol