Flight Don Mueang International Airport departs from Bangkok Don Mueang International Airport at 22:35 and arrives at Jakarta Soekarno–Hatta International Airport at 01:55.
The flighttime is about 3h 20m. The distance travelled ("as the bird flies"): 844 Km. So the average speed is roughly 253 Km.
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Sunday, as prices are on average 111.46% higher than on Tuesday. (Average prices, based on 17229547 datapoints.)
We have a lot more statistics for flights QZ 259 and between Bangkok and Jakarta.