Reunification Express

Vietnam is roughly 1,700 kilometres long and, in places, barely fifty wide. It is a country shaped like a railway — and there is a railway shaped like the country. A single metre-gauge line runs from Hanoi to Ho Chi Minh City, 1,726 kilometres and 175 stations, and it takes about thirty hours end to end.

The French built it, slowly and at great cost, between 1899 and 1936; the full Hanoi–Saigon link was formally in operation on 2 October 1936. Then the country tore itself apart, and the line with it — bombed, cut, and for years simply severed in the middle.

Which is where the name comes from. The war-damaged railway was rebuilt after 1975 and the through service returned on 31 December 1976. The Reunification Express is not a marketing flourish. It is a description of what the train does: it puts the country back in one piece, twice a day, in both directions.

Ride it and Vietnam arrives in order — the deltas and limestone of the north, the long thin waist where the country narrows to almost nothing, the imperial capital at Huế, the beaches of the centre, the sprawl of the Mekong at the far end. And in the middle, the three hours everyone remembers: the Hải Vân Pass, where the track abandons the flat and goes climbing around a headland on a shelf above the South China Sea.

It is not luxurious. It is a real train full of real people, it is very cheap, and the food comes through the window. It is one of the great railway journeys of Asia.

The train pulls out of Hanoi in the afternoon or the evening, depending which one you've taken, and the city gives way to the Red River delta almost immediately — paddy fields to the horizon, water buffalo, conical hats bent over the rice, and graves standing in the middle of the fields because the land is too precious to waste on a cemetery.

Through the night it runs south to Vinh and down the narrow waist of the country, where Vietnam pinches to a few dozen kilometres between the Laotian mountains and the sea. This was the most heavily bombed landscape on earth. You wake somewhere near Đồng Hới, and by mid-morning the train is running into Huế — the imperial capital, its citadel and tombs strung along the Perfume River, and the first place most people get off.

Then comes the reason to have taken the train at all.

South of Huế the line reaches the coast at Lăng Cô, a long sandbar between a turquoise lagoon and the open sea, and begins to climb. For the next three hours it works around the Hải Vân Pass — the "Pass of the Ocean Clouds" — on a ledge blasted into the side of a headland, ducking through tunnels, curving out again with nothing between the window and the water but a few metres of scrub and a very long drop. Cars go through a tunnel underneath and miss all of it. On a clear day you can see back along the whole coast; in cloud, which is often, the jungle drips and the sea vanishes and it is somehow better.

The train comes down into Da Nang — beaches, bridges, and the gateway to Hội An — and then runs south through the central coast, a long afternoon of fishing villages, salt pans, dragonfruit farms and startling blue water, to Nha Trang.

The last night takes it inland and south through the dark, and the final morning is the Mekong's edge: flat, hot, dense, endlessly busy. The train arrives at Ho Chi Minh City having crossed a country that is still, in living memory, two.

Almost nobody should do all thirty hours in a single sitting, and the good news is that nobody has to. The line is built for hopping: Hanoi to Huế overnight, the pass to Da Nang in the morning, a few days at Hội An, another sleeper south. Same railway, taken in bites.

The Reunification Express is not one train but a family of scheduled Vietnam Railways services running the North–South line both ways, several times a day. Southbound trains take odd numbers (SE1, SE3, SE5, SE7), northbound even (SE2, SE4, SE6, SE8).

Real southbound departures from Hanoi (2026 timetable — confirm before travelling):

Northbound, SE2/SE4/SE6/SE8 mirror these up the coast from Ho Chi Minh City across a similar spread of morning-to-night departures. All run the full 1,726 km through Vinh, Đồng Hới, Huế, Da Nang, Nha Trang and on to Saigon.

Good to know:

• Do the Hải Vân Pass in daylight. This is the single most important piece of planning: the Huế ⇄ Da Nang leg (~3 hours) over the pass is the scenic climax, and some overnight services cross it in the dark. Pick a train whose timing puts you there by day.
• Sit on the right going south for the sea over the pass — on the left going north.
• The SE trains are the good ones — newer and faster than the older TN locals; book sleepers ahead, and avoid travelling at Tết (Lunar New Year) unless booked far out.
• Typhoon season (roughly September–November) floods the central coast and can close the line through it; build in slack.

Times as of the 2026 Vietnam Railways timetable. Confirm current schedules with the operator — see the Tickets section below.

Tickets come from Vietnam Railways, online or at any station, and they are cheap enough that the decision is comfort rather than cost. Hard seat is fine for three hours and punishing for thirty; soft seat is reclining and air-conditioned, and plenty for the daytime legs; hard sleeper is six berths three high, and the top bunk is cheap for a reason; the soft sleeper is four berths with a door that shuts, and is worth it overnight.

Berth position matters. Lower berths cost more and earn it — you get to sit on them during the day, which upper-berth passengers do not. Book months ahead for Tết, or do not travel then at all. Bring đồng in cash for the platform vendors, who are the best part of the catering. And check whether your train does the Hải Vân Pass in daylight before you book anything else: it is the whole reason you are here.

The line is the itinerary — nearly everything travellers come to Vietnam for sits within a short ride of a station on it.

Three stops that are not below. The Hải Vân Pass, the three hours between Huế and Da Nang, is the finest stretch of the whole railway, but you don't visit it; you ride it, and the carriage window is the only viewpoint that matters. Da Nang itself has the beaches and the Marble Mountains, and is the jumping-off point for Hội An half an hour down the road. And Nha Trang is the central coast's beach city, with the Po Nagar Cham towers on the bluff above the river mouth and islands offshore.

The rest sits in the cards below, north to south. Almost none of it needs a flight, a tour or a car: get off, spend two or three days, and get back on.

On the train, the decision is the berth — and over thirty hours it matters more than the money saved.

• Soft sleeper — four berths, air-conditioning, a door that closes. The obvious choice overnight, and still inexpensive by any international standard. Ask for a lower berth: uppers are cheaper but you can't sit up on them, and you'll spend the daylight hours perched on someone else's bed or standing in the corridor.
• Hard sleeper — six berths, three tiers. Cheaper, hotter, more sociable, and perfectly survivable.
• Soft seat — fine for the daytime legs, including the pass. Don't try it for a full night.

Off the train, the line hands you the country's best bases:

• Huế — small hotels along the Perfume River, and the citadel on the doorstep. The natural first break coming south.
• Hội An (via Da Nang) — the one place to give more nights than you planned: an old merchant town of lanterns and tailors, with a beach nearby. Da Nang has the station and the high-rises; Hội An has the charm.
• Nha Trang — beach hotels of every grade, and a good place to do nothing for a day.
• Hanoi and Ho Chi Minh City — the bookends, with everything from hostels to grand old colonial piles.

Timing: March–April and September–November are broadly the best, though a country this long never has one good season everywhere at once. Avoid Tết, when every berth in Vietnam is spoken for, and treat the typhoon months on the central coast with respect — the Hải Vân stretch is exactly the part that floods.