As long as your gynae gives you the green light and if your pregnancy doesn't have any complications or high risk. I traveled to bkk during my 10th week back in Nov. And when you can't travel anymore will depend on the airline, some allows up to 28 weeks only. Some 32 weeks. By then you will need a gynae letter to show them you're fit to travel when you're big enough.
yes as long as your gynae clears you. depends on airlines