My favorite is AirAsia… I’m in Chiang Mai and can fly direct to Bangkok, Krabi and Hua Hin…
We do a lot of 3-4 day jaunts so with their app you can go right to the boarding gate…
I also select the first row seats for a few more dollars and you get great legroom and priority boarding… There also a great regional airline… we can also go direct to Singapore and Kuala Lumpor…