Bangkok to Siem Reap (Angkor)

By the Viamo editorial team · Editor Terje Moy · Last updated July 2026 · 5 min read

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Bangkok to Siem Reap, gateway to Angkor Wat, is a well-worn overland route with one unavoidable feature: the land border crossing at Poipet–Aranyaprathet, which has a well-earned reputation for scams. Done right, it is a straightforward day of travel; done carelessly, it can be an expensive lesson. Here is how each option works, and what to actually watch for.

The easiest way: a direct international bus

Several operators run direct coaches from Bangkok to Siem Reap that handle the border crossing as part of the ticket — you get off, walk through immigration on both sides with the group, and re-board a connecting vehicle on the Cambodian side. The full journey typically takes 8–9 hours including the border stop, depending on queues. This is the option most first-time visitors should take: it removes most of the opportunities for touts to intercept you mid-journey, since you are moving with a group and a company representative rather than alone. See our coaches in Southeast Asia guide for how this cross-border bus network fits together more broadly.

Book through a reputable operator or a well-known booking platform rather than an unmarked travel-agent storefront near Khao San Road — quality varies enormously, and the cheapest advertised fare sometimes comes with a much longer, multi-transfer journey than advertised.

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The classic route: train to the border, then onward transport

The more traditional (and cheaper) way is to take a Thai State Railway train from Bangkok to Aranyaprathet, the last town on the Thai side, a journey of around 5–6 hours on a slow, no-frills service. From Aranyaprathet station, it's a short tuk-tuk or motorbike-taxi ride to the Poipet border itself, then a walk across, followed by a shared taxi, minibus or bus for the roughly 2.5–3 hour onward leg to Siem Reap on the Cambodian side.

This route costs less than the direct bus but takes longer overall once you add the connections, and it puts more of the crossing's logistics in your own hands — which is exactly where the well-known Poipet scams operate.

The honest scam warnings at Poipet

Poipet is notorious among overland travellers in South-East Asia, and it's worth being blunt about the common tricks:

• Fake "visa" offices before the actual border. Touts on the Thai side sometimes direct travellers to unofficial buildings claiming to process Cambodian visas at inflated prices. The real Cambodian visa-on-arrival counter is at the official border post itself — walk past anyone stopping you before that point.
• "Free" shuttle buses to a fake bus station. On the Cambodian side, some operators run free shuttles that bypass the real Poipet bus terminal and instead take you to a private depot, where onward tickets are sold at a markup and departures are timed to a schedule that suits the operator, not you.
• Overpriced "through tickets" sold in Bangkok. Some Khao San Road agents sell a single ticket that bundles an inflated Cambodian visa fee into the price without saying so clearly. Check exactly what the ticket covers before paying.
• Clock manipulation. Cambodia is one hour ahead of Thailand; a small number of scams have historically relied on confusing travellers about the time to push a rushed, worse-value transaction at the border. Set your phone to the correct time zone once you cross and don't let anyone rush your paperwork.

None of this means the crossing is dangerous — millions of travellers cross Poipet every year without incident. Sticking to official channels, knowing the standard Cambodian e-visa or visa-on-arrival fee before you travel, and being politely firm with touts is enough to avoid nearly all of it.

The e-visa alternative

Applying for a Cambodian e-visa online in advance is one of the simplest ways to sidestep the visa-related scams entirely, since it removes any need to hand over cash or paperwork to anyone other than the actual immigration officer at the booth. It costs a little more than a visa on arrival and needs to be arranged a few days ahead, but many travellers find the certainty worth it. See our South-East Asia entry requirements guide for the wider regional picture, and our Thailand entry requirements guide if you also need to check your entry conditions before leaving Bangkok.

Flying instead

Direct flights between Bangkok and Siem Reap take roughly 1 hour in the air, and for travellers short on time or keen to avoid the border altogether, flying removes the Poipet crossing completely. Once you add airport transfers, check-in and security at both ends, the door-to-door time saving over the direct bus is more modest than the flight time alone suggests — but it is by far the least stressful option if the overland crossing doesn't appeal. If you're starting this trip after flying into Bangkok, see our Bangkok airport to the city guide for getting from Suvarnabhumi or Don Mueang into the city first.

Which should you choose?

For most travellers, the direct international bus is the best balance: it handles the border as part of the ticket, keeps you with a group, and costs a fraction of flying. Choose the train-plus-onward-transport route if you want the lower fare and don't mind arranging each leg yourself, and choose to fly if avoiding Poipet altogether is worth the extra cost to you. Whichever you pick, arrange your Cambodian visa in advance if you can, and treat any unsolicited help at the border with polite scepticism.

Practical tips

• Start early — the Poipet border can get very busy by mid-morning, and queues lengthen significantly later in the day.
• Carry a passport photo and small-denomination US dollars for the Cambodian visa on arrival, even if you've applied for an e-visa, as a backup.
• The Aranyaprathet train is genuinely slow and has minimal facilities — it is an experience in itself, not a fast connection, so don't book it if you're tight on time.

Frequently asked questions

What is the best way from Bangkok to Siem Reap?

A direct international bus that includes the Poipet border crossing as part of the ticket is the simplest and most reliable option for most travellers, taking around 8–9 hours in total.

Is the Poipet border crossing safe?

Yes, but it has a reputation for scams involving fake visa offices and misleading "free" shuttles. Stick to official channels, know the standard visa fee in advance, and be firm with touts.

Do I need a visa for Cambodia?

Most nationalities need a visa, available on arrival at the border or, more conveniently, as an e-visa applied for online before you travel. Check current requirements with the Cambodian authorities or your own government.

How long does the train to the border take?

The Thai State Railway train from Bangkok to Aranyaprathet takes around 5–6 hours, after which onward transport to Siem Reap adds a further 2.5–3 hours.