My friend and I are heading straight from Halong Bay to Hanoi airport (to catch a domestic flight to Danang). We haven’t booked the departing flight yet because we aren’t sure which flight to book. One flight leaves at 4:30, the second at 6:30. We’ve been assured by the company driving us to the airport that they will get us there by no later than 3:30. I’m concerned that 1 hour will not be long enough to check-in/get through security etc., to be on time for the 4:30 flight. It’s unclear if we’ll be able to check-in online prior to the flight (i’m not sure we’ll have internet access on our cruise). I think the 6:30 flight would be safer and more realistic. Any suggestions or can anyone advise how smoothly domestic flight departure process is from Hanoi?