Hi, I brought my 4 mth old to BKK and I was breastfeeding her on the plane during take off and landing due to the air pressure. As it is a short flight, it was a breeze for us. If you are worried, check on the airline medical assistance should you need help. Pls get a seat at the bassinet area (book early) so that you and baby can get good rest. As long as the baby is well fed and good rest, it should reduce her chance of falling sick.