It's over 36 hours so it's safe for me to say that it is the old Nha Trang airport (VVNT / NHA), which as Asturias points out, is now being "developed'.
I flew into this very convenient airport once, in the 90s, in a Vietnam Airlines ATR72. The only airport I've ever been to where you could walk to your beachside hotel, or if your luggage was too heavy, cyclo drivers were waiting to take you:
However, for the sake of progress and profits, this very convenient airport was closed and replaced by the reopened Cam Ranh Bay (VVCR / CXR), an hour's bus ride away.
Here are a couple of images I had lined up, if the location proved too difficult:
SVNAF A-1 Skyraiders trailing smoke in the colours of the South Vietnamese flag
SVNAF U-17A (C185)
In 2016, it was reported that the airport was being sold:
https://saigoneer.com/saigon-develop...port-for-$540m
The latest GE image shows that the development is underway:
Deveoper's plan:
Asturias56 has control.