มาแล้วครับ เริ่มบิน มีนาคม 2557 นี้แล้ว
Bangkok Airways plans to launch Chiang Rai service in Mar-2014
Bangkok Airways executives told CAPA on the sidelines of the 15-Nov-2013 Association of Asia Pacific Airlines (AAPA) Assembly of Presidents in Hong Kong that the carrier also plans to launch services to Chiang Rai in northern Thailand at the end of Mar-2014. Bangkok Airways intends to initially serve Chiang Rai with two daily flights, with an increase to three daily flights within six months.
Chiang Rai is a larger tourist destination than Udon Thani but a slightly smaller market overall. Currently Thai Smile, Thai AirAsia and Nok operate a combined 11 daily flights between Bangkok and Chiang Rai. There are no scheduled services linking Chiang Rai with other domestic destinations (although China Eastern operates three weekly international flights from Kunming.)
http://centreforaviation.com/analysis/bangkok-airways-plans-domestic-expansion-as-competition-intensifies-with-launch-of-thai-lion-139987