Zwei Zahlen entscheiden, ob Ihr US-Pass bereit für Kambodscha ist: sechs Monate Gültigkeit ab Ihrem Ankunftsdatum und eine vollständig leere Seite. Wenn Sie sich bei einem der beiden irren, hält Sie die Fluggesellschaft in den Vereinigten Staaten auf, bevor Sie jemals Phnom Penh erreichen.

Your US passport must be valid for at least 6 months from your date of entry into Cambodia and must have at least one full blank page for the entry stamp. Validity is counted from the day you arrive, not the day you apply for the eVisa, and the 6-month rule is enforced by the airline at your US departure gate. The eVisa is tied to the exact passport number on your application, so if your passport is expiring soon or short on pages, renew it first and then apply on the new book. Damaged passports and recently changed names are the two edge cases that catch Americans out most often.
Cambodia keeps its passport rules for US citizens short: your passport must be valid for at least 6 months from the day you enter, and you need at least one full blank page for the entry stamp. That is the whole standard. Almost everything that goes wrong for Americans is a version of one of those two numbers — a passport that runs out 5 months after arrival instead of 6, or a book so full of stamps that there is no clean page left.
The detail most travelers miss is where the rule bites. People assume an immigration officer in Phnom Penh checks the dates. By then it is far too late to matter. The 6-month validity rule is enforced by your airline at the US departure gate, because the carrier is liable if Cambodia turns you away on arrival. A passport that is one week short gets you stopped at LAX, SFO, or JFK — bag checked, boarding pass in hand, and no flight.
Your US passport needs at least 6 months of validity remaining measured from your date of entry into Cambodia — not from the day you fill in the eVisa form, and not from the day you book your flight. This is the single number that trips up the most Americans, because it is easy to glance at an expiry date that looks comfortably in the future and miss that it lands inside the window.
Work it forward from your arrival date. If you land in Cambodia on March 1, 2027, your passport must be valid through at least September 1, 2027. An expiry of October 2027 is fine. An expiry of July 2027 is not, even though the trip itself is long over by then — the airline reads the rule as six clear months past the entry date, full stop. The math is unforgiving precisely because a human is not doing it; a gate-system check is.
Why six months and not the length of your actual stay? It is a regional convention across most of Southeast Asia, built so that no traveler is sitting in-country on a near-dead passport if plans slip or an emergency extends the trip. Cambodia applies it the same way Thailand, Vietnam, and Indonesia do. For Americans, the practical upshot is simple: if your passport expires anytime in the six months after your planned arrival, treat it as expired for this trip and renew before you do anything else.

Cambodia requires at least one full blank page in your passport for the entry stamp. Not a half page, not the corner of a page already carrying a Thai or Vietnamese stamp — one clean page the officer can ink without crowding another country. For most Americans with a standard 28-page passport book and a few trips behind them, this is a non-issue. For frequent travelers, it is worth ten seconds of checking before you apply.
Did this guide help you?
Erste Reise nach Kambodscha? Hier ist die ehrliche Checkliste für Erstbesucher aus Amerika — das Visum, die US-Dollar-Geldbesonderheit, die Sicherheitsrealität, die Impfungen, der Tempel-Kleidungsstil und wie die Ankunft am neuen Flughafen im Jahr 2026 tatsächlich aussieht.
Alle sieben Landgrenzen zwischen Thailand und Kambodscha sind seit Juni 2025 geschlossen, daher ist in 2026 der einzige Weg für Amerikaner, von Thailand nach Kambodscha zu gelangen, das Flugzeug. Hier erfahren Sie, wie die Routen Bangkok-nach-Siem Reap und Bangkok-nach-Phnom Penh funktionieren, welches Kambodscha eVisa Sie vor dem Boarding benötigen, und warum der alte Poipet-Überlandplan nicht mehr existiert.
Drei Möglichkeiten, die 310 Kilometer zwischen der Hauptstadt Kambodschas und Angkor Wat zurückzulegen: ein $15 Expressbus, ein 45-minütiger Flug oder eine langsame Flussfähre. Hier erfahren Sie, was jede Option für einen amerikanischen Reisenden tatsächlich kostet, wie lange sie dauert und welche zu Ihrer Reise passt.
Open your passport to the visa pages — the ones after the photo page, headed for stamps and visas — and flip through. You are looking for at least one page with no stamps, no stickers, and no visas on either side that would crowd the new stamp. Cambodian Immigration stamps on a clean spread, so a page that is half-used on the back counts as used. If you are down to scattered gaps and edge slivers, you are effectively out of pages.
Frequent flyer? Count your clean pages now
If your passport is busy with Schengen, Japanese, and Thai stamps, count the genuinely clean pages before you apply for your eVisa. Fewer than one full blank page means a renewal, not a quick fix at the airport — there is no add-pages service for US passports anymore. The State Department ended visa-page inserts back in 2016, so a full book means a brand-new passport.

Two passport conditions cause more last-minute scrambles for Americans than expiry or pages combined: physical damage, and a name that no longer matches across documents. Both are fixable, but only if you catch them before you apply, because your eVisa locks to the passport you submit.
A passport with water damage, a torn or detached cover, a bent or delaminated photo page, or pages coming loose can be refused by either your airline or Cambodian Immigration — even if the dates and pages are fine. Normal wear is accepted; a soft cover and a few dog-eared corners will not stop you. Significant damage will. If the machine-readable zone at the bottom of your photo page is scuffed, smeared, or peeling, that is the part scanners read, and damage there is the most likely to cause a problem. When in doubt, renew — a damaged passport is treated as invalid, not as a lesser version of valid.
The name on your eVisa application must match your current passport exactly — character for character, including middle names and any hyphenation. If you married and changed your name but your passport still shows your maiden name, apply in the name on the passport. If you have already updated your passport, apply in the new name and travel on the new book. Do not mix the two, and do not apply in a name that matches your driver license but not your passport. The eVisa is checked against the passport, not against any other ID.

If your passport fails any of the checks above, renew it before you apply for your eVisa — not after, and not in parallel. The order matters because the eVisa attaches to the passport number you submit, and a brand-new passport carries a brand-new number. Renew, receive the new book, then apply on the new details.
In 2026, standard US passport renewal runs about 4 to 6 weeks once the application is received, with expedited service at roughly 2 to 3 weeks for an added fee. Online renewal is available for many eligible adults, which can shave processing time, but the realistic planning number is still weeks, not days. If you have a trip within a couple of months and a passport that needs work, treat the renewal as the long pole and book travel around it.

Run the full check in half a minute. Open your passport to the photo page and read the expiry date — is it at least six months past your planned arrival in Cambodia? Flip to the visa pages — is there at least one fully clean page? Look at the book itself — any water damage, a loose cover, or a scuffed strip across the bottom of the photo page? Check the name — does it match exactly what you will type on the eVisa? If all four are yes, you are ready to apply on this passport.
If any answer is no, the fix is the same: renew first, then apply on the new book. It is the single piece of advice that prevents the most stressful version of this — a paid eVisa attached to a passport you can no longer use, discovered at the airport. For everything else around eligibility and entry, the eligibility overview and the full visa hub linked above are the next two stops.
Popular pairing for Americans — but all 7 land borders into Cambodia are closed.
Read the 2026 border update →The classic Indochina loop. Americans need a separate Vietnam eVisa.
See the entry points guide →The quieter third stop on the regional route for US travelers.
Check Cambodia entry rules →Where many Americans connect on the way through to Phnom Penh.
Plan the connection →Your destination — sort the passport, then the eVisa, then the e-Arrival Card.
Start your eVisa →