I get asked about Cambodia more than almost any other Southeast Asia stop, mostly because the e-visa form makes it look so simple. Cambodia has three international airports, in Phnom Penh, Siem Reap, and Sihanoukville, and every one of them can still ask you for proof you're leaving. A dummy ticket, also called an onward ticket, is a real PNR booked for visa or border-check purposes without paying for the flight. Here's what actually comes up when you're standing in that queue.

Do I actually need an onward ticket to enter Cambodia?

Technically, yes. Cambodian immigration rules list proof of onward or return travel as a standard entry condition, same as most of its neighbours. In practice, it's checked less consistently than you'd think, but "less consistently" isn't the same as "never," and I wouldn't bet a trip on it.

What actually counts as proof of onward travel?

A confirmed booking with your name on it, a date that fits inside your permitted stay, and a reference number that pulls up in a real reservation system if anyone bothers to check. That can be a flight, and at some land crossings a confirmed bus ticket works too.

Document Confirmed booking Verifiable Works for Cambodia
Dummy / onward ticket Yes Yes Yes
Paid flight with return Yes Yes Yes
Google Flights screenshot No No No
Comparison site PDF No No No
Confirmed bus ticket (land border) Yes Sometimes Usually

A friend of mine tried the screenshot approach at Phnom Penh airport and got sent to a side desk while a supervisor sorted it out. Nothing dramatic happened, but she missed her tuk-tuk driver and had to rebook the ride.

I'm crossing overland from Thailand or Vietnam, does this even apply?

Yes, though enforcement is patchier at land borders than at the airports. Poipet, on the Thai side, and Bavet, on the Vietnamese side, both accept e-visas, and questions about onward travel come up less often there than at Phnom Penh airport immigration. Some smaller crossings, like Cham Yeam near Koh Kong, only do visa on arrival, so double-check which visa type your crossing actually supports before you show up with the wrong one.

For the Vietnam side of that route specifically, our Vietnam dummy ticket entry FAQ covers what Bavet and the airports there expect from arriving travellers.

My plans are flexible, I don't know when I'm actually leaving. What do I do?

This is the question I get the most, and it's a fair one when you're backpacking without fixed dates. The trick is booking something dated within your visa window, usually 30 days for the e-visa, rather than trying to match your real plans exactly. Nobody expects backpackers to have their whole route locked in. They just want a document that resolves cleanly if it's checked.

Does the e-visa application already cover this requirement?

No, and that catches a lot of people out. The online form asks for your passport photo page and a selfie-style photo, nothing about onward travel. That silence makes it easy to assume the requirement doesn't exist, right up until someone at the airport asks anyway.

Can I just book a fully refundable ticket and cancel it after?

You can, and plenty of people do, but a refundable fare usually costs more than a dummy ticket booked specifically for this purpose, and you still have to remember to cancel it. A short-hold onward booking does the same job for less hassle and less money.

If you'd rather skip building your own booking from scratch, you can book a real onward ticket in two minutes and get back to planning the actual trip.

How long does the booking need to stay valid before my flight?

As long as it needs to cover your stated stay, and no longer. Our dummy ticket validity FAQ goes into exactly how long a PNR stays queryable before it needs refreshing, which matters if your Cambodia dates shift while you're still planning. For the official line on entry conditions, the UK's foreign travel advice for Cambodia is a solid reference to check before you go, and it updates faster than most blog posts, including this one.

What happens if an officer isn't satisfied with what I show them?

Usually just a delay, not an outright refusal. Expect to get pulled to a side desk while someone more senior looks at your passport and whatever booking you're holding. I've seen it resolve in five minutes and I've seen it drag on closer to an hour, depending entirely on how busy the shift is that day. Worst case, and this is genuinely rare, you're asked to buy a ticket on the spot before they'll let you through, at whatever price happens to be available that day. None of that is fun to deal with after a long flight, so it's worth avoiding entirely if you can.

Frequently asked questions

Is Cambodia strict about checking onward tickets at the airport?

Not consistently, no, but it does happen, especially if your visa type or stated stay looks unusual. Bring one anyway.

What if I'm doing a longer Southeast Asia loop with no fixed exit date?

Book something dated within your Cambodia visa window. You can always change your actual plans later; the document just needs to satisfy the entry check now.

Do ASEAN nationals still need proof of onward travel?

The visa exemption covers the visa fee, not the underlying entry conditions. It's rarely enforced for ASEAN arrivals but technically still applies.

Will a hostel booking work instead of a flight?

No. Accommodation doesn't demonstrate you're leaving the country, which is the actual thing being checked.

Is it cheaper to book onward travel or risk it and hope nobody asks?

Booking is cheaper almost every time. The worst-case scenario at the border, buying a same-day ticket under pressure, costs far more than sorting this out in advance.