When is it safe to fly when pg?

[Gateau]

We are hoping to go on holiday in September and I am also hoping I might be pg by then.
I'm not talking long-haul, just a 2-3 hour flight.
Can anyone tell me?

I have flown long haul in the first trimester and at the start of the third trimester. I didn't have any problems and I have a healthy DD. Take lots of water, and make sure that you get up and walk up and down a couple of times.
Have fun.

Thank you for advice!