guide
Connecting Flights at Long Thanh Airport
What a transit at Long Thanh involves: whether you re-clear immigration, how bags are handled, and how much connection time to leave.
Two different things called “connecting”
Long Thanh International Airport is being built to be a hub, which means connections are meant to be one of its main jobs. But “connecting in Ho Chi Minh City” now covers two situations that could hardly be more different, and travellers routinely book the wrong one.
Connecting within Long Thanh — landing and departing from the same terminal — is a normal airside transit, and the subject of this page.
Connecting between Long Thanh and Tan Son Nhat is not a connection at all. It is two airports, a city crossing, and a whole separate journey; the airport comparison page covers that case and why it deserves a great deal more time than any airline minimum suggests.
Check which one your itinerary actually contains before you plan anything else. The airport codes on the two boarding passes tell you immediately.
Do you re-clear immigration?
The general rule at Vietnamese international airports: an international-to-international transit through the same terminal is designed to keep you airside, without formally entering Vietnam — you follow transfer signage rather than immigration.
The case that catches people is international to domestic. A domestic flight departs from the domestic system, so a passenger connecting onward within Vietnam clears immigration and customs, collects checked bags, and re-enters departures. That is a fundamentally longer process than an airside transfer, and it is where most missed connections at Vietnamese airports come from.
Because Long Thanh’s opening period will see arrangements bedding in, treat any transit assumption as worth confirming with your airline for your specific pair of flights, rather than reasoning from how another airport works.
What happens to your checked bags
Two possibilities, and the difference is entirely about how the ticket was sold:
- Booked as one itinerary, on a single ticket — bags are usually checked through to the final destination, and you collect them at the end. Confirm this at your original check-in desk, and confirm it out loud.
- Two separate tickets — bags are almost never through-checked. You collect them, clear customs, and check in again from scratch. This turns a “two-hour connection” into something that needs far more than two hours, and it is the single most expensive misunderstanding in self-connected itineraries.
If you booked two tickets to save money, that saving assumed you would not miss the second flight. Price the risk honestly.
How much time to leave
Airlines publish minimum connection times, and those minimums assume a settled airport, on-time inbound flights, and a passenger who moves briskly. Long Thanh in its opening years satisfies none of those assumptions reliably.
Three things push the realistic number up:
- Walking distance. Phase one is one very large terminal, and the internal distances are the fixed floor under any connection, even with every queue empty.
- New-airport variability. Baggage delivery and queue handling are historically the least predictable parts of a terminal’s first season.
- The domestic switch. If your onward flight is domestic, add the full arrival process — immigration, bags, customs — plus a fresh departure process.
For a self-connected itinerary in the opening period, leaving a large margin is not caution, it is arithmetic. For a single-ticket airside transit, the airline’s minimum is the floor rather than the plan.
If the inbound flight is late
On a single ticket, the airline carries the responsibility for rebooking you — that protection is most of what you paid for when you chose the through fare. On separate tickets, a missed onward flight is your problem and your cost, whatever caused the delay.
This asymmetry matters more than usual at a brand-new airport, where “the inbound was late” is a more likely sentence than at a mature one.
Where assistance helps, and where it does not
A transit escort can meet you at the aircraft and walk you the right way — which, in a terminal this size, is worth real minutes on a tight connection, and is most of the value of arrival assistance applied to a transfer.
What it cannot do is make an immigration hall move faster, retrieve a bag that has not reached the belt, or hold a departing aircraft. Book the margin first; treat the escort as insurance on the margin, never as a replacement for it.