タイの国境地帯でカンボジアのeVisaが機能しない理由（米国市民に必要なこと）

Where your eVisa actually does work

The same eVisa that cannot cross the closed Thai border works perfectly everywhere it can actually be presented. The three Cambodian international airports accept it on arrival, every time: Techo International (KTI) for Phnom Penh, Siem Reap-Angkor International (SAI) for the temples, and Sihanouk International (KOS) on the south coast. Land at any of them and your eVisa is checked at the immigration desk and you walk in. No land-border issue, because there is no land border involved.

So the fix for the Thailand leg is simply to fly it. Bangkok to Siem Reap is the direct replacement for the old Poipet overland run — about an hour in the air, landing right by Angkor Wat. Bangkok to Phnom Penh lands at KTI, the new capital airport that replaced the old Phnom Penh field (PNH) on 9 September 2025. Bangkok to Sihanoukville reaches KOS, the air version of the old Cham Yeam beach route. In every case the eVisa is accepted the moment you land, and you skip the closed border entirely.

The eVisa is also accepted at a defined set of land and river crossings — just not on the Thai border, because none of the Thai crossings are open. From Vietnam, the major crossings used by Mekong-route travelers accept the eVisa, including Bavet on the Ho Chi Minh City road. From Laos, the Trapeang Kriel crossing in the north is eVisa-eligible. So if overland travel is the point of your trip, you keep it everywhere except the Thai leg, which you fly.

The one rule for any land crossing is to confirm your exact crossing is on the eVisa-eligible list before you commit, because a small regional border may not be covered even when a nearby major one is. Our guide to the Cambodia land borders that accept the eVisa for US citizens lists the crossings that actually work, so you are not guessing at the gate.

What US citizens actually need to enter Cambodia in 2026

Strip away the border noise and the requirement is simple. You need a valid Cambodia eVisa and, for every air arrival, a separate e-Arrival Card. That is the whole package. The Tourist eVisa is $80 USD all-in and the Business eVisa is $90 USD, both approved in 3–5 days and delivered as a printable PDF by email. The closed Thai border does not change a single one of those numbers — it only changes how you physically reach the country, from land to air.

The eVisa gives you a single entry, valid three months from issue, with a 30-day stay. Note that the tourist auto-extension ended in November 2025, so plan your dates inside the 30 days rather than counting on extending at the last minute. None of this is affected by the border situation. You apply the same way, you get the same document, and it is accepted at all three airports on arrival exactly as it would be if the Thai border were wide open.

The second piece is the e-Arrival Card, and it is the one Americans most often forget because it is separate from the visa. It is mandatory for every air arrival, it is 14 fields across a short form, and it has to be filed within 7 days before you fly. It is $20 USD verified through us. It is checked right at the immigration desk when you land, alongside your eVisa, so a missing or sloppy Card is a real way to get bounced at the kiosk even with a flawless visa in hand.

If you are still weighing how the Thailand-Cambodia trip fits together now that the land legs are gone, our guide to the closed Thailand-Cambodia borders and what Americans can do instead lays out the full status and the working routes. The short version: fly the Thailand leg, keep any Vietnam or Laos legs overland, and your eVisa carries you the whole way.

予約前にまとめてみましょう

The clean version for any American: your Cambodia eVisa is valid, the Thai land border is closed, and those are two separate facts that happen to collide at the gate. There is no land-border eVisa, no document that reopens a closed crossing, and no agent with secret access. To enter Cambodia, fly the Thailand leg into KTI, SAI, or KOS, where your eVisa is accepted on arrival — and add the e-Arrival Card for every air arrival. If you are checking whether anything has changed, our running status on whether the Cambodia-Thailand land border is open gives you the current answer in one place.

Next steps and related reading for Americans: apply for your Cambodia eVisa when you are ready to lodge, read the full closed-border guide for the working routes, and check the running reopening status before you book the Thailand leg. The Tourist eVisa is $80 USD all-in and the Business eVisa is $90 USD, both approved in 3–5 days and delivered as a printable PDF by email.