Yangon international Airport is a newer one in Myanmar which functions quite good only the immigration procedure is similar cumbersome as in Thailand and during the English colonial times.
The Airport IATA code is RGN and it is located at Mingaladon township about 16 km north of Yangon City center and two terminals the international and the domestic. This two are the only international airports in Myanmar (Burma) are the only in Yangon and Mandalay.
Be aware that the baggage allowance is not much so the best to do when air-travel is keep you luggage as minimal as possible and try to get everything into a back-bag not heavier than 15 kg to carry on your body and to taken into the aircraft that way it cant lost and you wont have problems. In particular when on a tour in Myanmar and Thailand almost everything can be bought locally for low prices (cheap Chinese imports) and since low priced just dump it when you leave and no overweight charges.
If you buy anything heavy such as souvenirs or whatever let the seller do the packaging and shipping of the air freight they are tuned for. Usually they also supply insurance and you have a hassle free air travel.
From Bangkok to Yangon a trip for some days with fun and shopping and before starting it needs some travel gear first such as Air Travel Bags Luggage otherwise no comfortable travel.