Originally Posted by
fishfly
Just did a quick check on Google Flights... going to pass on flying to/from Van Don lol. Looks like the best/cheapest would be to back track to HAN, fly to HUI, train to DAD, then to BKK.
You asked for August 2019. Check the fares again in May/June. The airport just opened days/weeks ago.
For a 5 or 6 day trip to visit Hue and Halong you should be flying everywhere, or if you take the train, it better be a night train.