The major international airports in Thailand are at Bangkok and Phuket, and both are proficiently-served by intercontinental flights. Basically all airlines those fly to Asia afterward fly into Bangkok, this means there are profusion of facilities and the competition regarding the routes helps to save the ticket prices beside.
International airports are also located at Hat Yai, Krabi, Ko Samui and Chiang Mai, though these largely confined to flights from another Southeast Asian countries. Kuala Lumpur and Singapore make marvelous places to catch flights into these smaller Thai cities, meaning you can skip the ever-market touts and queues at Bangkok.
The national carrier is the competently-regarded Thai Airways, in front Bangkok Airways filling in some gaps in the available region. Bangkok Airways offers release Internet entry even though you wait for boarding to launch at your confront.
Many inexpensive carriers help Thailand including Nok Air, Thai Air Asia and Thai Lion Air.