Hi soulmate,
I have also had an early miscarriage after flying from melb to brisbane return. I started to spot a little while i was in brissy, and then after i returned it became worse. I finally lost the baby a week later, after having had a scan, which said the baby was still alive and to just rest !!
I will never know if it was the flight or if it would have happened anyway, that's the frustrating part. I had never heard of it happening to anyone else before, so im glad i found your post. Will be interesting to hear if anyone else has experienced a similar thing.