I have a friend moving to Hanoi and she invited us there so I was looking for fares and found this really good deal. Also the weather seems to be just fine in May as is the last month of spring so not too hot and not too humid yet. Never been to Vietnam but always wanted to see the Ha Long bay and to eat the real Vietnamese food at its origins as I am a fan of it, except the snake. I have a hidden admiration for these people looking back at their history.
From Hanoi I checked flights to Siem Reap or Bangkok and found so many flights at around 50 euros one way.