A layover in Hanoi or Saigon, and what it buys

A layover in Vietnam is really two questions. The first is whether you can legally leave the airport, and the second is whether the city is close enough to be worth it.

The answers are different in Hanoi and Ho Chi Minh City, and the difference is 20 kilometres of road.

Should you leave the airport at all?

Only with six clear hours in Saigon or eight in Hanoi, counted from wheels down rather than from the schedule.

Leaving also means clearing immigration, which needs whatever entry permission your passport requires. There is no transit visa that lets you out for an afternoon. The e-visa guide covers what applies to which nationality.

What fits into a Saigon layover?

The colonial walk and one meal. The Central Post Office, Notre-Dame and the Opera House sit within a few hundred metres of each other in District 1, which the things to do page covers as a forty-five minute stroll and the colonial architecture guide explains properly.

Add a bowl of something on a plastic stool and you have used three hours well. The metro from Ben Thanh is the other option, and it is a novelty rather than transport for a visitor with an afternoon.

Take a Grab both ways. The ride is short, the price is fixed in the app, and the airport taxi queue is where a tight layover goes wrong.

What fits into a Hanoi layover?

The Old Quarter, and only if the numbers work. Noi Bai is about 27 km out, so the round trip costs at least an hour and a half of the gap before anything else happens.

With eight hours you get a walk around Hoan Kiem, a bowl of pho and a coffee, which is a fair sample of the city. With six you get a taxi ride, a rushed lunch and an anxious return. The things to do in Hanoi page has the short version of a first walk.

What if the layover is overnight?

Take an airport hotel rather than the city. Both airports have hotels a few minutes away, and eight hours of sleep beats a round trip that ends with a two-in-the-morning taxi back.

If the gap runs past twelve hours and you can enter the country, a night in town is the better version. Treat it as a short stay rather than a layover, and read where to stay for the districts near the airport road.

What should you do with the bags?

Use the left-luggage counters in arrivals, which both airports run, charged by the piece and by the hour. Clear immigration first, then drop them. In town it is cheaper, and the luggage storage guide covers who holds a bag and for how much.

Keep the receipt on your phone as well as on paper, and keep your passport and boarding documents with you rather than in the stored bag. The safety guide covers the everyday theft risk, which is real and small and concentrated on phones rather than luggage.

What if you cannot leave?

Tan Son Nhat and Noi Bai are both workable for a few hours. Tan Son Nhat's international terminal has lounges sold by the hour, showers, and enough food to avoid the gate-side prices. Noi Bai's Terminal 2 is newer, quieter and better provided for a long wait.

The terminals hold nothing worth seeing, which is the honest reason to leave when the numbers allow. If they do not, buy a lounge hour rather than sitting at the gate: it costs less than a taxi into town and it comes with a shower after a night flight.

Do the arithmetic before you land. A layover that looked like a day out at booking is often five usable hours once immigration, traffic and the check-in cut-off are counted, and knowing that at the gate is better than discovering it in a queue.

What is the mistake people make?

Underestimating the return. Traffic into both airports thickens from about 16:00, and international check-in typically closes an hour before departure. The useful part of a layover therefore ends around 15:00, not around 17:00.

Work backwards from the check-in cut-off, add an hour of traffic, and spend whatever is left. That is usually less city than the map suggests and more than nothing, which is the whole calculation.