I flew UK-Singapore-Perth at 29 weeks when i was expecting no3.I had been well all through pregnancy and was absolutely fine, no discomfort whatsoever. If the airline are happy to carry you, I;mnot sure on their policies these days, and your doc is happy for you to go then why not go for it if you feel like it.

Just remember though a lot can change between now and then, even if your doc is fine with it now you will have to get a med cert within 48 hours of travelling (usual airline regs). If your situation changes and you're not pernitted to fly would you stand to lose much money?

Taz