Airplane travel while pregnant.

At what stage should traveling on a international flight via plane be stopped?

I traveled last year up to 8 mos, wouldn't have pushed it much further than that, and I got a note from the midwife team at my hospital to take with me on the plane. Discuss it with your caregiver and see what they recommend.

Airlines will not let you travel internationally past 30 weeks without doctors/midwifes permission.  Just make sure you drink alot.  I traveled at 20 weeks and got dehydrated, it's so much harder to keep hydrated when you're pregnant.

Yes, I drank loads of water and got those funky socks from Dr Scholl, and walked around the plane as much as I could. You can travel, you just have to take precautions - and also check with your airline and see what their restrictions are (some vary).

Like the ladies said, drink a lot of water, wear the flight socks and walk a lot.  Ask for bulkhead as well, have them put you on the list.  (You have a young child though so that should be no problem)  I heard you can fly till 28 weeks, but I think it's different for everyone and getting a note from your midwife is important.

This is what Virgin says about pregnancy and flying

Please always let our Special Assistance Co-ordinators know about your pregnancy before you fly - they will offer you advice on how this may affect your travel arrangements.

Providing your pregnancy has been uncomplicated and you are not experiencing a related medical condition there is no problem flying until your 28th week.

After your 28th week we need to receive a signed certificate from your Doctor, Obstetrician or Midwife stating that you have had an uncomplicated pregnancy, are fit to travel and confirming your date of delivery.

After your 34th week, we may only carry you for urgent medical or compassionate reasons and only on approval of the Virgin Atlantic Company Doctor. You will also need to be accompanied by a suitable medical escort.

Other restrictions may apply, please contact Special Assistance for further details.

and BA

British Airways is happy to accept pregnant ladies on our flights.
In order to ensure the health and well-being of both the mother and the baby, the following policy is in place:

For uncomplicated single pregnancies, we restrict travel beyond the end of the 36th week, and for twins, triplets etc., beyond the end of the 32nd week.
After your pregnancy has entered its' 28th week, we ask that you carry with you a letter from your doctor or midwife, stating the pregnancy is uncomplicated and confirming the expected date of delivery. In this letter, your doctor should state that you are in good health, that they are happy for you to fly, and that (in their opinion) there is no reason why you cannot fly.
Seatbelt extensions are carried on all British Airways flights for use, if required, by pregnant passengers.

Thank you all for the advice.  I will make sure to get a note.

Call ahead to whichever carrier you are using. When I flew from the UK to the US at 5 months and called different airlines, I got a different answer from them all!! I didn't have to bring a doctors note, either. I used BA.

The company that I get travel insurance from won't insure me past 25 weeks, so that's my cut-off, regardless of what the airlines say.  Most airlines will let you travel later, though, but I don't want to leave the country without any medical insurance!