Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 10:05 and arrives at Bangkok Suvarnabhumi Airport at 11:30.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 660 Km. So the average speed is roughly 466 Km.
The best day to arrive at Ho Chi Minh City is Friday and it would be best to avoid Sunday, as prices are on average 84.1% higher than on Friday. (Average prices, based on 717965 datapoints.)
We have a lot more statistics for flights TG 551 and between Ho Chi Minh City and Bangkok.