Just priced BKK-HKG, one-way, in first, on a random date in April (20th, if you want to know), on www.thaiair.com for 14205THB, or about 370.75USD. There were 2 flights with F, TG600 and 606, leaving at 0800 and 1600 respectively. Thats a pretty darn good price given all the goodies that come with it (limo transfers, speed through HKG in a golf cart )