Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 15:55 and arrives at Hanoi Noi Bai International Airport at 18:05.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 593 Km. So the average speed is roughly 274 Km.
The best day to arrive at Bangkok is Saturday and it would be best to avoid Wednesday, as prices are on average 228.66% higher than on Saturday. (Average prices, based on 923594 datapoints.)
We have a lot more statistics for flights K6 3614 and between Bangkok and Hanoi.