Flight Aware often does not have complete data. Airline statement says they departed at 12:41am and lost contact about two hours later at 2:40am. Looking at the Flight Aware estimated positions (at 1:42 since that data set has departure at 11:43am), they would have been flying above the mountains/jungles of south central Laos about that time, around 200Km due west of Da Nang, Vietnam. Not good news at all.