Do you need to go through passport control during transit at Ho Chi Minh City airport?

Ho Chi Minh City airport has three terminals, two of which handle international flights. If your entire journey is on a single ticket with one airline and doesn't require a terminal change, you stay in the sterile zone and skip passport control.

If your transit requires a terminal change or you have separate tickets, you must exit the sterile zone, go through passport control, collect your baggage, and check in again — meaning you'll pass through immigration twice.

Travelers who have transited Ho Chi Minh City on a single through-ticket report that no repeat security screening or passport control is required, staying fully airside throughout.