Probably not the best idea.
Ask your doc though
check with the airlines too... they might not let you even if your doctor says its ok.
Believe any airlines if your within1 month of your due date they won't let you fly even with a doctor's note
My dr told me "oh no". I was bummed. But yea airlines wont let either..sorry
I flew at 36 weeks with my second pregnancy. But my doctor had to check me right before and give a note. She only approved bc we had to relocate for a job and they told him he had to come then or the offer was off the table. I would not fly that late unless absolutely necessary.