How Far Is Thailand From Vietnam? About 990 km, and No Land Border

Bangkok to Hanoi is about 990 km. Two hours in the air. Bangkok to Ho Chi Minh City is nearer 740 km and takes about an hour and a half.

Thailand and Vietnam share no border. Laos and Cambodia sit between them, so no road and no railway runs from one country into the other. You fly. Almost everyone does. We are the destination management company working on the ground in both countries, and we book this crossing most weeks of the year. It is the least complicated part of a two-country trip.

The distance reality: no shared border

At a glance: Thailand and Vietnam share no land border, with Laos and Cambodia lying between them, so there is no way to drive directly and almost everyone crosses on a single short flight. Bangkok to Hanoi is about 990 km (615 mi) and roughly two hours by air; Bangkok to Ho Chi Minh City is about 740 km (460 mi) and about an hour and a half. The overland alternative through Laos or Cambodia is possible but takes several days, so it suits a dedicated overland journey, not a two-country holiday.

On a map they look like neighbours across the top of mainland Southeast Asia. There is no Thai-Vietnamese frontier to drive across, no through train, no single road crossing from one country directly into the other. Every overland journey has to pass through Laos or Cambodia first. That one fact shapes the whole itinerary.

Stop measuring in road miles and the two countries are genuinely close. The figures below are approximate great-circle distances between the main cities, the kind of number that predicts a flight time, not a drive.

Treat these as planning numbers. The exact figure shifts with the airport pair and the routing. What holds across all of them is the shape: the southern crossing to Ho Chi Minh City is the shortest hop, the northern crossing to Hanoi a little longer, and both are short-haul by any measure. On a combined trip the international leg never dominates the schedule the way a long-haul would. You will spend longer getting to the airport and through security than you spend in the air.

The flight that connects them

The schedule supports the crossing well. From Bangkok Suvarnabhumi there are nine or ten nonstop departures a day to Hanoi and about a dozen to Ho Chi Minh City. Thai Airways and Vietnam Airlines hold the full-service end, Vietjet and Vietravel add lower fares, and Bangkok Airways sells the Vietnam Airlines flights under a codeshare. The result is a choice of departure times across the day instead of one daily flight to build the itinerary around.

On the Thai side the hub is Bangkok. Bangkok has two airports. Suvarnabhumi (BKK) is the larger international gateway and carries most full-service long-haul and regional traffic. Don Mueang (DMK) is the older airport and now handles a bigger share of low-cost regional flying, including Thai AirAsia's own nonstops to both Vietnamese gateways. The distinction matters at the booking stage, because the two sit on opposite sides of the city and a same-day transfer between them needs real time built in. Most luxury itineraries cross from Suvarnabhumi, alongside the long-haul network.

On the Vietnamese side there are two natural arrival points and a useful third. Hanoi (HAN) opens the north, the cultural heartland, Ha Long Bay and the highlands. Ho Chi Minh City, still widely called Saigon (SGN), opens the south and the Mekong Delta. Da Nang (DAD) serves the central coast and the heritage towns of Hoi An and Hue. Da Nang connects to Bangkok on both its airports but to nowhere else in Thailand, so it carries fewer Thai links than the two big hubs. It can still be the smarter arrival when a trip is built around central Vietnam.

The aim on any combined trip is one clean international sector and no backtracking. A group flies into one country, travels through it in a logical direction, crosses once, flies home from the other. Book the crossing alongside the internal flights and the connection times stay sensible; book it as an afterthought and a delay on one leg starts threatening the next.

Which Thai airport you cross from

This is the decision that quietly costs people a day, because the four Thai departure airports do not all reach both Vietnamese gateways.

Verified against airline schedules on 27 July 2026. Routes and frequencies move with the season, so we check live schedules while we plan.

Bangkok is the default. It holds the densest schedule to both Vietnamese gateways and connects to the long-haul flights at either end of a trip. If the Thai leg ends in the capital, the crossing takes care of itself.

Chiang Mai (CNX) is the useful one, with a catch. It has a nonstop to Hanoi, which makes it the natural crossing point when the Thai leg finishes in the north. A group spending its final Thai days in the hills can fly straight on instead of doubling back to Bangkok. The catch is that the service does not run every day, so it has to be checked against the actual trip dates before the itinerary depends on it. There is no nonstop from Chiang Mai to Ho Chi Minh City. A northern Thai finish paired with a southern Vietnamese start means a connection, almost always back through Bangkok, and that is a routing worth designing around rather than discovering late.

Phuket (HKT) is the mirror image. There is a nonstop to Ho Chi Minh City, so a trip that ends on the Andaman beaches and starts again in the Mekong Delta crosses in one hop. Hanoi from Phuket is a connection. The real question is whether a same-day one-stop beats an extra night in Bangkok to catch a nonstop, and that depends on the rest of the itinerary.

The general rule: cross from wherever the Thai leg naturally ends, and let the gateway that airport actually reaches shape which end of Vietnam you start at.

The overland reality and why most trips skip it

No border means no quick overland crossing. Travelling between the two countries by land is possible, but only through Laos or Cambodia, and only over several days.

The northern route runs from northeastern Thailand through Laos into northern Vietnam: long bus or rail segments, at least two border crossings. The southern route goes through Cambodia, typically Bangkok to Phnom Penh and on to Ho Chi Minh City. That one is more straightforward, and still a multi-day undertaking with its own visa steps for the country in the middle.

For most travellers the maths settles it. Overland turns a ninety-minute flight into two or three days on the road, spent moving instead of arriving, and adds a third country's entry formalities to a trip meant to cover two. It earns its place as a deliberate adventure through Laos or Cambodia, where the route itself is the reason for going. It does not earn its place as a way to get from a Thai beach to a Vietnamese city. Anyone genuinely drawn to the cross-border idea is better served by a planned multi-country journey such as our combined Cambodia and Vietnam route, which builds the overland and regional legs into the experience instead of treating them as a transit problem.

One practical note on the crossing. It is an international border, so each country sets its own entry rules and they rarely match. Thai and Vietnamese visa or visa-exemption terms are decided separately, a traveller has to satisfy both, and any overland leg brings a third country's requirements into play. We keep a current breakdown in our guide to entry and visa requirements, worth reading before dates are locked.

How this fits a two-country trip

Distance and transport are the easy part of pairing Thailand and Vietnam. That is rather the point. The crossing is short enough and frequent enough that it never constrains the itinerary.

The harder questions are the interesting ones. How to sequence the two countries. Which to visit first. How long to give each. Where the trip should peak. Those are itinerary problems, not logistics problems, and we cover them in our guide to building a two-country itinerary and our guide to how many days you need. The single clean flight described here is what lets a combined trip feel like one journey instead of two trips bolted together. Each country gets its own distinct stretch, and the border crossing stays all but invisible to the client.

If you are planning a Thailand and Vietnam trip and want the crossing and the internal flights handled as one operation, talk to our team. We hold the supplier relationships and the flight knowledge in both countries, and we build the international sector alongside the rest of the schedule, so the route holds up against real timings and not a hopeful map.