Honnestly if it was me i won't go. isnt safe at all.
I thought airlines got pretty funny about it after 32 weeks or so? I personally wouldn't do 8hrs that far on just in case. Im pretty sure your dr would have to sign you something or another before airlines say yes also
I would say no but thats just my opinion. You are too close to due date and such a long flight. I would ask your dr to know the right answer, you would most likely need clearance from dr to fly anyway for the airline.