The most extensive air service within Thailand is provided by Thai Airways International (TG) and their budget partner Nok Air, while other Thai airlines, such as Orient Thai, PB Air, One-two-go, and SGA service destinations large and small throughout the kingdom. Bangkok Airways (PG) is a self proclaimed “boutique” Thai airline that owns its own airports; it is based out of Sukhothai and has many flights to and from Koh Samui and Trat (Koh Chang).