Overnight Trains in Thailand: Sleeper Classes, Berths and Booking

An overnight train in Thailand is a State Railway of Thailand (SRT) service whose carriages convert to made-up bunks for the night, and the comfortable standard for most travellers is the second-class air-conditioned sleeper, which turns the long haul across the country into a bed you booked instead of a hotel you paid for. ¹ The first time I took one, from Bangkok up to Chiang Mai, I expected to endure it and instead slept better than I did in half the guesthouses waiting at the other end. The trick is knowing the classes, picking the right berth, and booking it before the good bunks go. Once you do, the night train stops being a backpacker rite of passage and becomes the most sensible way to cover a long distance in this country.

What the sleeper classes are

The class you want is almost always the second-class air-conditioned sleeper, the balance point between price and comfort on the SRT network. ¹ By day the carriage is arranged as facing seats; in the evening a staff member walks through and folds them down into two tiers of berths, makes them up with sheets and a pillow, and pulls a curtain across each one for privacy. You get air conditioning, a reading light, and a flat place to lie down, which is all the night really needs.

Above it sits first-class: a private cabin with one or two berths and a door that locks, at a higher fare, which earns its keep if you are a couple or want to shut the world out. ¹ Below it is third-class, seats only, perfectly good for a daytime leg but not something to sleep in overnight. My standing advice, worn in over a decade of these trips, is that the second-class air-conditioned sleeper is the one to learn and default to.

Upper berth or lower berth

Within a second-class sleeper carriage the berths come in two tiers, and the choice between them is the one decision that most shapes your night. ¹ The lower berth is the wider of the two, it has the window, and you can sit up in it more easily, which is why it costs a little more and sells out first. The upper berth is reached by a short ladder, sits a touch narrower under the carriage roof, and is cheaper, with the quiet advantage that nobody perches on it during the evening because it is already folded down as a bed.

I book the lower berth when I can, purely for the window and the extra headroom to sit up and read. When only uppers are left I take one happily; you lose the view but gain a cocoon nobody else can intrude on. Either way, keep the bag you actually care about up on the bunk with you rather than in the aisle rack.

The routes worth taking overnight

The classic overnight run is Bangkok to Chiang Mai, roughly 11 to 13 hours, leaving in the early evening and arriving the following morning, so the whole journey passes while you sleep. ¹ It is the route the sleeper was made for: too far to enjoy by road in a day, short enough to fly, but the night train lets you skip both the flight and a hotel and wake up in the north. If you want the full comparison of ways to make that trip, I have laid them out in Bangkok to Chiang Mai.

The other great sleeper corridor runs south. Overnight southern trains head down towards Surat Thani, the mainland railhead for the gulf islands of Samui, Phangan and Tao, where you change onto a ferry to finish the trip. ¹ It is the backbone of the classic Bangkok to the islands journey, and doing the long leg overnight means you reach the coast in the morning fresh for the boat rather than road-weary.

What the night is genuinely like

The night itself is calmer than newcomers expect, a slow evening that settles into sleep somewhere around the first few hours of the 11 to 13 hour run. ¹ Dusk arrives, the food trolley or the order-taker comes through, and there is a gently sociable stretch where the carriage eats and chats before the beds go up. Then the main lights dim, everyone climbs behind their curtain, and the train rocks you along with a rhythm that I find knocks me out faster than my own bed does.

It is not silent. There is the rattle of the couplings, the occasional station stop, someone’s alarm before dawn, and the air conditioning runs cold, so the blanket matters and a layer helps. My routine now is fixed: eat early, brush teeth at the end-of-carriage sink before everyone else has the same idea, water and phone tucked into the bunk, earplugs in. Do that and you wake up already at your destination, which is the whole quiet magic of the thing.

How to book a berth

You book a Thai sleeper either directly through the SRT, which sells tickets on its own D-Ticket site, or through an aggregator that resells the same seats alongside buses and ferries. ² Booking direct is usually cheapest and lets you pick the exact berth; an aggregator such as 12Go is handier when you want the train to sit in one basket with a connecting ferry or bus, and it shows the whole journey in one place. ³ For the mechanics of doing it all online, e-tickets and pickup, see booking transport online in Thailand.

Whichever route you choose, book ahead for anything overnight, and earlier still around Thai holidays, when berths on the popular evening departures vanish fast. ⁴ Grab a lower berth if you have the choice and it is still there; if not, take the upper and do not fret, because a booked bunk of any tier beats a sold-out train and a last-minute flight every time.

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General guidance, not a live timetable. SRT services, classes and fares change from time to time, and journey times vary with the specific train and any delays; treat the durations here as approximate and confirm the current schedule and fare before you travel.