Join Date: Jan 2006
Location: Silicon Valley, CA (SJC, SFO)
Programs: UA 1P, AA, *A Gold, Hyatt GP, HHonors, SPG, Priority Club
Posts: 172
I flew at 5 weeks, 7 weeks, 10 weeks, and on and off until about 32 weeks (pregnancy was uneventful and son is now 20 months old.) No limit from my OB on early flying, except that at my 9 week visit she wanted to confirm a healthy heartbeat first, just so there wouldn't be any nasty surprise/experiences while I was overseas... if you have concerns about that (viability in the first trimester) you might just keep it in mind, but there's no actual risk to the fetus caused by the flying.
More common are issues of comfort, e.g. exhaustion, morning sickness, staying hydrated/peeing, etc.