I flew London to Perth at 34 weeks with DD and Karratha to Perth (around 2 hours) at 37weeks with DS. Just get a letter from docter to say you can fly just in case they do stop you at airport.

Incidentally they ahve the cutoffs not because they are concerned for the mother and baby from a medical point of view but because if you do go into labour they are required to divert automatically to the nearest airport and it therfore becomes too costly to do that. Its all about the money!

Oh you will most probably find tho that as soon as you get off the plain your ankles/legs will swell up. Happened to me both times, walked on as normal pregnant woman and got off the other end as elephant woman!!!