Bangkok Airways plans to sell its shares through the Stock Exchange of Thailand next month in a partial divestiture that will end its 45-year full private ownership.
Capt Puttipong Prasarttong-Osoth, the airline's president, said the company plans to offer 730 million new shares in an initial public offering.
Most of the proceeds will be used to support the company's growth plan including a new hangar, fleet expansion and IT system upgrade.
Earlier, the full-service airline said it hoped to raise 10 billion baht through the sale of up to 30% of its shares in a partial divestiture.
"Bangkok Airways needs to expand to cope with the freer flow of regional tourists that will be induced by the imminent Asean Economic Community as well as those from China and India," said Capt Puttipong.
The company will add 10 more aircraft over four or five years from 23 now.
Capt Puttipong said Bangkok Airways is introducing three new domestic and international routes this year, to Krabi, Mandalay and Udon Thani.
The Krabi route started operation in March with three daily flights.
The Mandalay route will be launched on Sept 16, while Udon Thani will be added in the fourth quarter.