How US Citizens Travel Bangkok to Siem Reap in 2026 (Fly, Land Border Closed)

Why the old Bangkok-to-Siem Reap bus route no longer works

For years the cheap way into Cambodia from Thailand was the overland run: a bus from Bangkok west to the border town of Aranyaprathet, across the Poipet checkpoint on foot, then onward by bus or taxi to Siem Reap. That entire chain depended on one thing — an open land border at Poipet. Since June 2025, that border has been closed, and so has every other Thailand–Cambodia land crossing. There are seven of them, and all seven are shut to travelers.

The closure has held firm through 2026 with no published reopening date. The practical takeaway is blunt: do not buy a through-bus ticket that promises to carry you from Bangkok all the way to Siem Reap, do not believe a tout or an old forum post claiming Poipet quietly reopened, and do not build your itinerary around an overland crossing that no longer happens. If a booking site is still selling a Bangkok-to-Siem Reap bus, it is selling a route that ends at a closed gate.

Because the situation has shifted before and could shift again, treat any specific reopening claim with skepticism and check a current source rather than a years-old blog. The U.S. Department of State maintains an active travel advisory for Cambodia, and the wider reason the only option is now to fly is covered in our explainer on why Americans must fly from Thailand to Cambodia.

The Bangkok to Siem Reap flight: what to expect

With the land route gone, the air route is the whole story — and it is an easy one. Both of Bangkok’s airports, Suvarnabhumi (BKK) and Don Mueang (DMK), run flights to Siem Reap-Angkor International Airport (SAI), the airport that sits closest to the Angkor temple complex. The flight is roughly an hour gate to gate. Compared with the full day the old bus-and-border route ate up, that is the single biggest time saver on a Thailand-and-Cambodia trip.

Carriers, frequency, and which Bangkok airport

The Bangkok–Siem Reap corridor is served by a mix of full-service and budget carriers, with multiple departures spread across the day. Full-service flights tend to leave from Suvarnabhumi (BKK); several budget options leave from Don Mueang (DMK). If you are connecting from a long-haul flight out of the US, check which Bangkok airport your inbound lands at, because BKK and DMK are on opposite sides of the city and the transfer between them eats time. Booking your Cambodia leg from the same airport you arrive at saves a cross-town scramble.

Siem Reap-Angkor (SAI) — the airport you actually land at

You arrive at Siem Reap-Angkor International Airport (SAI), the newer airport that replaced the old in-town field. It is farther from the city center than the old airport was, so budget for a 45-minute to one-hour transfer by taxi or arranged hotel pickup into Siem Reap proper. That is still a fraction of the time the overland crossing used to cost, and it lands you on the doorstep of Angkor Wat rather than at a chaotic border town.

Whichever carrier and airport you pick, the one fixed rule is that your eVisa has to be sorted before you fly — you present an approved, printed visa at check-in in Bangkok and again at Siem Reap immigration. If your plans run to the capital as well, our guide to the Bangkok to Phnom Penh flight with the border closed covers that parallel route into Techo International.

The Cambodia eVisa you need before you board

Flying in from Bangkok does not change the visa US citizens need — it is the standard Cambodia eVisa. The Tourist eVisa is $80 USD all-in, approved in 3 business days, and delivered as a printable PDF by email. It gives you a single 30-day stay and is valid for 3 months from issue, so you can apply now even if your Bangkok-to-Siem Reap leg is a few weeks out. It is valid at Siem Reap-Angkor airport, which is exactly where you are landing.

The timing point that matters most: you need the eVisa before you board, not on arrival. Airlines check for an approved visa at the Bangkok gate, and Cambodian Immigration expects a printed PDF when you land at Siem Reap. Because approval takes 3 business days, the safe play is to apply at least a week ahead — apply the moment your flight dates firm up and you remove the only thing that can realistically stop you boarding.

A quick note for multi-country trips: the Cambodia eVisa is single-entry. If you fly into Siem Reap, hop back to Thailand, and want to return to Cambodia, that second entry needs its own visa — and because the land border is closed, you cannot slip back across overland the way travelers used to. For a clean Thailand-then-Siem Reap trip that ends with a flight home, a single Tourist eVisa is all you need.

There is no document pack to assemble for this visa — no return flight, no hotel booking, no bank statement. That is part of why it goes so fast. When your dates are set you can apply for your Cambodia eVisa directly, and most Americans finish the form in under ten minutes.

The e-Arrival Card and arriving at Siem Reap

There is a second, separate step that catches travelers off guard, and it applies to every air arrival into Cambodia: the e-Arrival Card. It is not part of the visa. It is a short digital arrival declaration — 14 fields across three sections — that you submit within 7 days before your flight. Verified through us it is $5 USD. The eVisa proves you can enter; the e-Arrival Card is the arrival form Siem Reap immigration expects you to have already filed.

When you land at Siem Reap-Angkor, the flow is calm and quick: present your printed eVisa, your e-Arrival confirmation, and your passport at immigration, then collect your bags and head out to your transfer. There is no land-border scrum, no tout steering you toward an unofficial counter, and no surprise stamping fee — the air arrival is a completely different experience from the Poipet crossing it replaced.

Treat the e-Arrival Card as a deliberate second task rather than an afterthought, because a single mismatched date or a misread field is the most common reason Americans get sent back at the kiosk. Our guide on whether US citizens should fly or cross overland into Cambodia walks through sequencing the visa, the e-Arrival Card, and your flights so each one is done before its deadline.

Planning the Thailand-then-Siem Reap trip in 2026

Now that flying is the only option, the trip is easier to plan, not harder. You no longer have to pad your schedule with a buffer day for a slow border, vet which bus company is reputable, or budget for the small unofficial fees that used to grease the Poipet crossing. You book a flight, sort your eVisa, file your e-Arrival Card, and show up at the gate.

A sensible 2026 structure looks like this: spend your Bangkok and Thailand days first, fly into Siem Reap to see Angkor, then either fly home from Siem Reap or continue to Phnom Penh or the coast before flying out. Because the eVisa is single-entry, plan a route that enters Cambodia once and exits once — a loop that bounces back into Thailand mid-trip means buying a second Cambodia visa, which is rarely worth it now that you cannot do the return overland.

One more thing worth flagging: the tourist auto-extension that used to let travelers stretch a 30-day stay ended in November 2025. If you want longer than 30 days in Cambodia, you either plan to leave and return on a fresh visa or look at the Business eVisa, which is the only Cambodia visa you can extend in-country. For a typical one-to-two-week temples-and-capital trip, the standard 30-day Tourist eVisa is comfortably enough.

Budget-wise, the flight does cost more than the old bus ticket did — but the bus route carried hidden costs the airfare does not: scam fees at the border, a lost travel day, and the risk of a missed onward connection. Once you net those out, a one-hour flight straight to the temples is the better deal for almost everyone, and it is the only deal still on the table.

Putting the Bangkok-to-Siem Reap route together

Here is the whole picture in one line: the Bangkok-to-Siem Reap land route through Poipet is closed in 2026, so you fly — a direct one-hour hop from Bangkok into Siem Reap-Angkor (SAI), right by the temples — with a Cambodia eVisa sorted before you board and an e-Arrival Card filed in the week before. The Tourist eVisa is $80 USD all-in, approved in 3 business days as a printable PDF. Before you book, you can confirm whether the Thailand–Cambodia land border has reopened so an old reopening rumor never derails your plans.

When your flights are booked, apply for your eVisa early — the 3-business-day approval is the only part of this leg with a clock on it, and there is no document pack to assemble first. Most Americans finish the form in under ten minutes, and once your visa lands as a PDF, the rest of the Bangkok-to-Siem Reap trip is just a short, easy flight.

Next steps and related reading for Americans: apply for your Cambodia eVisa when your flights are booked, and read why your Cambodia eVisa will not work at the Thai land border for the full closure context before you finalize the route.