Flight Kuala Lumpur International Airport departs from Kuala Lumpur Kuala Lumpur International Airport at 06:40 and arrives at Vientiane Wattay International Airport at 08:25.
The flighttime is about 2h 45m. The distance travelled ("as the bird flies"): 367 Km. So the average speed is roughly 133 Km.
There is an 1 hour time difference between Kuala Lumpur and Vientiane