Thanks a lot for the prompt replies s_isale, flor1212, Colt45.. :)

How is the record of Qatar Airways for punctuality? Will the security check be full of people at around 6am?

My return flight to Dubai is even worse.. 56 minutes in transit! Am not too worried about this though as there are plenty of Doha - Dubai flights everyday.

Too bad Emirates and Etihad don't fly to Vietnam :/