Suvarnabhumi was officially opened for limited domestic flight service on 15 September 2006, and opened for most domestic and all international commercial flights on 28 September 2006. The airport is currently the main hub for Thai Airways International, Bangkok Airways and Orient Thai Airlines. It also serves as regional gateway and connecting point for various foreign carriers. The airport is located on what had formerly been known as Nong Nguhao (Cobra Swamp) in Racha Thewa in Bang Phli, Samut Prakan, about 25 kilometres east of downtown Bangkok. The name Suvarnabhumi was chosen by King Bhumibol Adulyadej and refers to the golden kingdom, hypothesised to have been located somewhere in Southeast Asia.