Can two passengers fly on one ticket on domestic flights in Vietnam (e.g. Da Nang to Phu Quoc)?

There is fresh repeat evidence from a Vietnam domestic flight: with this non-standard single-ticket setup, the ticket scan may not work automatically, but staff can re-check the passengers and still let them proceed, including via the Face ID boarding system.

Online check-in may not be available for some domestic flights from Da Nang — check in advance. If it is available, you can go straight to security without queuing at the check-in desk.

Trip.com is a convenient platform for booking domestic and regional flights in Southeast Asia, including Da Nang to Phu Quoc. Flying without checked baggage and using online check-in makes the process smoother.

In practice, two people have traveled together on a single ticket showing one seat and one passenger on Vietnamese domestic flights without any issues at the gate. However, this is not standard and carries no guarantee.