Thailand to Cambodia in 2026: Flights and the Land Border Situation

Prepared by the NovAsia Editorial Team

In 2026, the familiar overland journey from Bangkok to Siem Reap is not a viable route. As of 25 July, passenger land crossings between Thailand and Cambodia remain suspended, and conditions near the border are considered unpredictable. For an ordinary traveller, the practical choice is to fly from Thailand to Phnom Penh or Siem Reap.

That does not make Cambodia difficult to reach. Regular air services continue between the two countries, and the flight from Bangkok is short. The complications come from outdated information: many older travel guides, bus timetables and search results still describe Poipet or Koh Kong as functioning international crossings. Phnom Penh also has a new airport and airport code, while travellers must separately check their Cambodian visa, electronic arrival card and status for re-entering Thailand.

The practical answer for 2026

From Bangkok, the most direct route is a nonstop flight to Phnom Penh or Siem Reap. Choose Phnom Penh for the capital, business travel, a longer stay or onward journeys towards Kampot, Kep and central Cambodia. Choose Siem Reap for Angkor, north-western Cambodia or a short cultural trip.

From Phuket, Chiang Mai, Krabi, Koh Samui and other Thai cities, routing through Bangkok is often the most dependable approach. Direct regional services may appear, disappear or operate only on selected days, so they should not be treated as permanent. A connection in Bangkok usually offers more options, but it is essential to check whether both flights use Suvarnabhumi or whether one departs from Don Mueang.

The most reliable sequence is to choose the Cambodian city first, then the Bangkok airport, and only then compare fares. Searching with an obsolete airport code or treating Bangkok as a single airport creates more problems than the flight itself.

Why the land border is closed

Passenger movement across the Thailand-Cambodia land border was suspended following armed conflict and a severe escalation of the long-running border dispute in 2025. Fighting included rocket and artillery fire, and later incidents prevented border crossings from returning to normal operation. Current British and Australian government travel advice continues to state that land borders and crossing points remain closed.

The suspension is not limited to the well-known Aranyaprathet-Poipet crossing formerly used for travel between Bangkok and Siem Reap. Travellers should not rely on the Hat Lek-Koh Kong coastal route, Chong Chom-O Smach or other checkpoints. Humanitarian, official or freight exceptions do not make a crossing available to ordinary international passengers.

Travelling to the border simply to ask in person is a poor strategy. Government advisories refer not only to closed checkpoints but also to continuing military tension, landmines and unexploded ordnance in affected areas. A private operator may still sell transport towards the border, but that does not mean a foreign passenger will be allowed through or that the approach is safe.

The situation may change, but a limited reopening for local residents, trade or a specific category of traveller would not necessarily restore normal international tourism. Do not buy a non-refundable combined bus ticket, arrange a private transfer to Poipet or build fixed bookings on both sides until reopening has been officially confirmed by both countries and clearly applies to foreign passengers.

Choosing between Phnom Penh and Siem Reap

The right airport depends more on the next stage of the trip than on a small difference in airfare. Phnom Penh and Siem Reap are in different parts of Cambodia, and an apparently cheap flight can create a long and expensive onward transfer.

Phnom Penh is the natural entry point for the capital, Kandal, Kampot, Kep and many longer-stay arrangements. From the capital, travellers can continue by domestic flight, coach, minivan or private car. Flying into Siem Reap simply because the fare is slightly lower and then travelling immediately to Phnom Penh rarely saves time.

Siem Reap is the better choice when Angkor, the city itself and nearby Tonle Sap excursions are the main purpose of the visit. From Bangkok, it is particularly suitable for a short break: the journey avoids the full-day road trip and border procedures that once defined the overland route.

Bangkok has two major airports. Suvarnabhumi uses the code BKK, while Don Mueang uses DMK. Full-service carriers and many international services use Suvarnabhumi; low-cost regional flights often use Don Mueang, although this is not a universal rule. If separate tickets involve different airports, the itinerary includes a road transfer across the metropolitan area and requires a substantial time buffer.

A protected through-ticket is safer than two unrelated low-cost bookings. Separate segments can become considerably more expensive if the first flight is delayed, checked baggage must be collected and rechecked, or the second departure turns out to be from the other Bangkok airport.

Phnom Penh's new airport

The most common error in material written before September 2025 is the old Phnom Penh airport code. Scheduled commercial passenger operations moved to Techo International Airport on 9 September 2025. The airport code is KTI. The former Phnom Penh International Airport, code PNH, no longer serves regular commercial passenger flights.

For travel in 2026, a booking should therefore show Phnom Penh, KTI. If an online listing still displays PNH for a current passenger flight, verify the itinerary directly with the airline. Old hotel instructions, saved transfer messages and archived travel articles may still refer to PNH even though the passenger will arrive at KTI.

Techo International Airport is outside the old urban airport area, south of central Phnom Penh. Transfer times should not be calculated using instructions written for PNH. Allow for immigration, baggage collection, meeting the driver and road traffic. The journey can take noticeably longer during busy periods or heavy rain.

When arranging collection, send the driver the code KTI, flight number and arrival details rather than simply saying "Phnom Penh airport". This is especially useful when a small hotel, private host or landlord is organising the car and may still use an old template.

Siem Reap is served by Siem Reap-Angkor International Airport, code SAI. It is also farther from the city than the former airport. At either destination, the scheduled landing time should not be treated as the time at which a tour, meeting or long-distance bus can begin.

Visa and Cambodia e-Arrival

The closure of the land border does not change Cambodia's basic entry rules. Foreign visitors need a visa or other appropriate permission for their nationality and purpose of travel. For many tourists, the practical options are an electronic tourist visa or a tourist visa on arrival, generally allowing a stay of up to 30 days. Eligibility and conditions depend on the passport, so they should be checked through Cambodia's official visa system or a Cambodian embassy before travel.

An e-visa reduces uncertainty because permission is obtained before departure. Use the official Cambodian government portal rather than a commercial intermediary with a similar name, additional service charges or its own processing timetable.

Foreign passengers arriving by air must also submit the Cambodia e-Arrival Card within seven days before arrival. The form combines immigration and customs information, but it is not a visa and does not create permission to enter Cambodia. Passport details, flight information and any e-visa should match exactly.

Keep offline copies of the following:

• the passport identity page;
• the visa approval, when obtained in advance;
• the Cambodia e-Arrival confirmation;
• onward or return travel evidence, if requested;
• the address of the first accommodation in Cambodia;
• travel-insurance documents and emergency contacts.

Do not rely solely on an app that requires a live connection. A flat battery, weak airport Wi-Fi or an inaccessible email account can turn a routine document check into an avoidable delay. Download PDFs in advance and save screenshots of the essential confirmations.

Baggage, connections and the real fare

On a short international route, the lowest headline fare is not always the cheapest final option. A budget ticket may exclude checked baggage, seat selection, meals and changes. For someone moving between Thailand and Cambodia with several suitcases, baggage charges can completely change which flight offers the best value.

Compare the total after adding every service you need. Also check the cabin-baggage limit: enforcement on a regional flight may be stricter than on the long-haul service that brought the traveller to Thailand.

A connection from another Thai city generally falls into one of three categories. A single ticket issued by one airline or partner group normally gives the passenger protection if the first sector is delayed. Two separate tickets through the same airport leave the connection risk with the traveller. A connection that changes from BKK to DMK adds baggage collection, a road journey across Bangkok and a completely new check-in process.

For a self-transfer, the buffer must cover more than the advertised drive between airports. Allow for baggage delivery, possible immigration formalities, traffic, check-in deadlines and security screening. A connection that appears technically possible on a timetable can be unrealistic in practice.

Airfares change by day, holiday period and booking lead time, so a fixed price range ages quickly. Compare nearby dates, both Bangkok airports and the fully inclusive fare. With the overland alternative unavailable, demand for flights can also be higher than during periods when travellers could simply take a bus the following day.

Returning to Thailand

A trip to Cambodia is also a departure from Thailand. For a visitor on a straightforward short-stay entry, that may seem obvious. For someone holding an extension of stay or a longer-term education, retirement, employment or family-based status, leaving can have significant consequences.

Before buying the ticket, establish whether the current Thai permission remains valid after departure and whether a re-entry permit is required. A re-entry permit is designed to preserve an existing authorised period of stay in circumstances where departure would otherwise end it. The correct procedure depends on the traveller's immigration basis and should be confirmed with the Thai Immigration Bureau or an appropriately qualified adviser before leaving Thailand.

Even when a new entry may be available under a visa exemption or a fresh visa, admission should not be treated as automatic. Immigration officers apply the rules in force and may consider the traveller's documents and travel history. Repeated short departures are not a guaranteed method of maintaining residence in Thailand.

Every arrival in Thailand also requires a new Thailand Digital Arrival Card, or TDAC, for foreign nationals covered by the system. The official platform allows submission within the three-day period before arrival, including the arrival date. A TDAC is valid for one entry and is not itself a visa or guarantee of admission.

The sensible order is to confirm the right to return and any re-entry-permit requirement first, then purchase the return flight, and submit a new TDAC shortly before travelling back. This prevents a simple Cambodia trip from unintentionally disrupting a longer-term Thai immigration status.

How to verify the route before departure

The border situation remains dynamic, so an article dated 2026 should not be treated as a permanent timetable. Verification does not require reading dozens of travel groups. Use different sources for different questions.

Check border status through official government travel advice and announcements from the relevant authorities, not through the continued sale of a bus ticket. Confirm flight operation directly with the airline. Check visa conditions through Cambodia's official eVisa system or a Cambodian diplomatic mission. Submit the e-Arrival only through the official government service.

Twenty-four hours before travelling, confirm:

• the Bangkok departure airport: BKK or DMK;
• the Cambodian arrival airport: KTI for Phnom Penh or SAI for Siem Reap;
• airline check-in time and baggage rules;
• the latest flight status;
• visa approval and Cambodia e-Arrival confirmation;
• the first accommodation address and airport transfer;
• the conditions for returning to Thailand, when the trip is not one-way.

An outdated guide can often be identified by three signs: it recommends Poipet as an open tourist crossing, treats PNH as Phnom Penh's active passenger airport, or makes no reference to Cambodia e-Arrival. Any one of these is enough reason to verify the rest of its advice.

Final recommendation

As of 25 July 2026, travellers should fly between Thailand and Cambodia. Land crossings remain closed, and travelling to the border in the hope of passing "depending on the situation" risks leaving the passenger without a route in a sensitive security area. Bangkok has direct air links to Phnom Penh and Siem Reap, while travellers from other Thai cities will often find the widest choice by connecting through the capital.

Four checks matter before purchase. Phnom Penh now uses KTI, Siem Reap uses SAI, and a Bangkok itinerary may involve either BKK or DMK. Cambodia requires appropriate visa permission and an electronic arrival card for air passengers. Anyone returning to Thailand should confirm that the trip will not cancel an existing status and must submit a new TDAC for the next arrival.

Border arrangements may change after publication, but reopening should be officially confirmed and clearly apply to foreign passenger travel. Until then, flying is not merely the backup option; it is the principal predictable route between the two countries.

Sources

1. UK Foreign, Commonwealth & Development Office — Thailand and Cambodia travel advice: suspension of Thailand-Cambodia land crossings, conflict-related risks and warnings for border areas. Current advice checked 25 July 2026.
2. Australian Department of Foreign Affairs and Trade, Smartraveller — Cambodia and Thailand travel advice: closure of all land crossing points, Cambodian visa requirements and Cambodia e-Arrival. Current advice checked 25 July 2026.
3. Ministry of Foreign Affairs and International Cooperation of Cambodia — official Cambodia eVisa portal: visa categories, eligibility and recognised entry points. Access checked 25 July 2026.
4. General Department of Immigration of Cambodia — official Cambodia e-Arrival service: electronic arrival-card requirements for air passengers. Access checked 25 July 2026.
5. Techo International Airport and Air Cambodia — official notices confirming the start of passenger operations at KTI on 9 September 2025 and the transfer from PNH. Access checked 25 July 2026.
6. Thailand Immigration Bureau — official Thailand Digital Arrival Card guidance and information on re-entry permits. Access checked 25 July 2026.

Frequently asked

Can I travel from Bangkok to Siem Reap through Poipet in 2026?

As of 25 July 2026, passenger land crossings between Thailand and Cambodia remain closed, so the Aranyaprathet-Poipet route is not available for ordinary travellers.

Which airport now handles passenger flights to Phnom Penh?

Scheduled passenger flights serving Phnom Penh use Techo International Airport, code KTI. The former PNH airport no longer handles regular commercial passenger services.

Do I need Cambodia e-Arrival when flying from Thailand?

Yes. Foreign passengers arriving in Cambodia by air must submit the electronic arrival card within seven days before arrival. It does not replace a visa.

What should I check before returning to Thailand?

Confirm whether leaving Thailand affects your existing immigration status, whether you need a re-entry permit, and submit a new Thailand Digital Arrival Card before each arrival.