If it is only 720 kms from KL to the coast of Vietnam why do they say the plane was airborne for 2 hours ? I'm guessing time zone change to Vietnam adds one hour ?
edit: Flight MH370 departed from Kuala Lumpur International Airport at 00:41 on Saturday (16:41 GMT Friday), and was due to arrive in Beijing at 06:30. Air traffic controllers lost contact at 01:30.
Looks like 49 mins in flight total.