The service is a collaboration with Thaicom Plc, the SET-listed satellite communications provider, and Global Eagle Entertainment Inc, a US-based provider of satellite-based in-flight WiFi and device-based entertainment.
Nok Air said WiFi service on its Nok Bussarakam aircraft was expected to start next month.
Thaicom chief executive Suphajee Suthumpun said in-flight broadband service was an emerging trend as people want to stay connected wherever they are. Over the next decade, some 13,000 commercial aircraft worldwide will be internet-enabled, with 3,000 in Asia, she said.
There are 3,300 aeroplanes equipped with internet services now, with 3,000 in the US, about 200 in Europe and 80 in Asia.