Originally Posted by dinbangkok
Having done lots of Thai domestic flying I can confirm that you always get 500 miles minimum, with any destinations over 500 miles accruing additional actual mileage (e.g. BKK>HDY). Do remember though that you get NO bonus mileage for flying C-Class on domestic routes.
Not true! using THAI ROP, for Chiang mai-Phuket segment, you get about 950 miles (when flying C).