Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 14:15 and arrives at Jakarta Soekarno–Hatta International Airport at 17:55.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 830 Km. So the average speed is roughly 226 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Monday, as prices are on average 171.79% higher than on Tuesday. (Average prices, based on 20311089 datapoints.)
We have a lot more statistics for flights EY 8141 and between Bangkok and Jakarta.
