Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 12:10 and arrives at Bangkok Don Mueang International Airport at 15:40.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 844 Km. So the average speed is roughly 241 Km.
The best day to arrive at Jakarta is Sunday and it would be best to avoid Tuesday, as prices are on average 33% higher than on Sunday. (Average prices, based on 43228962 datapoints.)
We have a lot more statistics for flights QZ 254 and between Jakarta and Bangkok.
