Most sites agree that flying during pregnancy is safe.
Many airlines won't let you travel past 36 weeks but that's because they're scared you're going to give birth on board and upset the drink service.
The only thing worth mentioning is to be sure to wear your seatbelt on the flight even if you're pregnant. I'll get into the seatbelt thing in seatbelts (go figure). It's also worth while getting up to walk around on a flight to reduce swelling and the chance of blood clots.
And don't forget to look as pathetic and sweaty as possible both at check-in and boarding – you may be able to score a bulk head seat or free sundae on the flight.
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