Passport:
You’ll need a passport with a validity of at least six months beyond entry date to enter Cambodia. Visas: The vast majority of tourists enter Cambodia on a tourist visa. This visa can be organized online, via a Cambodian embassy or on arrival at the two international airports and most land crossings. The typical visa is valid for 30 days. Visa extensions are possible.

Flights in

There are plans of building an airport on Koh Rong Island but so far those plans have not yet materialized. The closest airport is in Sihanoukville, although it is – August 2013 – literally – out of service. At the moment – August 2013 – Pochentong Airport is the closest major airport to the islands. A number of international carriers (both full service and budget) fly to Cambodia, including:

Air Asia
Asiana
Bangkok Airways
China Airlines
China Southern
Jetstar
Korean Air
Lao Airlines
Silk Air
Thai Air
Malaysia Airlines
Vietnam Airlines
Air France

Flights out

Right now, 27 airlines operate out of Pochentong Airport. Pochentong Airport offers nonstop flights to 13 cities. Every week, at least 21 domestic flights and 294 international flights depart from Pochentong Airport.

Koh Rong-Cheap Discount Airfares

Land border crossings

Cambodia has at least a dozen international overland border crossings. These allow overland travel to Thailand (via six crossings), Laos (via one crossing) and Vietnam (via five crossings). You can also arrive by air at either Phnom Penh or Siem Reap, both of which have international airports, or by sea at Sihanoukville.

Popular crossings:
The most popular overland border crossing to Thailand by far is the Aranyprathet/Poipet border crossing. To Laos, you only have one option, the Veun Kham/Dom Kralor crossing (but note your Laos visa on arrival is NOT available at this crossing). To Vietnam, the most popular crossing is the Bavet/Moc Bai crossing. Cambodian visa on arrival is available at all these crossings and Cambodian e-Visas are also accepted at these entry points.

Technicalities:
Cambodian border crossings are generally open from 08:00 to 20:00 with the exception of Veun Kham/Dom Kralor, which closes earlier. On weekends and late hours, don’t be surprised if you’re asked to pay a dollar or so in “overtime” — and don’t expect a receipt.

Cambodia/Lao borders:
Veun Kham/ Dom Kralor
This is the only overland option between Cambodia and Laos, making it quite popular. Both Cambodian and Lao visa on arrival is available. For a comprehensive walk-through on this crossing, see feature story on the Lao Cambodia border crossing.

Cambodia/Thailand borders:
Aranyaprathet / Poipet
This is by far the most popular and the most dysfunctional border crossing between Cambodia and Thailand. Cambodian visas on arrival are available and eVisas are accepted. Crossing times can be in excess of three hours depending on the whims of the border officials, but they can also be mercifully fast. Poipet (the Cambodian side of the border) has a major tout problem and it can be difficult to organise onwards transport to Siem Reap at a reasonable price. The Tales of Asia website has an excellent section dedicated to this crossing.

Hat Lek / Ko Kong
A very straightforward crossing, Hat Lek/Ko Kong is most convenient for those planning on travelling between Thailand’s Koh Chang and the Sihanoukville beach area of Cambodia. There are numerous reports of Cambodian officials here being particularly troublesome and asking ridiculous amounts of money for visas on arrival. The easiest way around this is to arrive with a visa already in hand. If you need to get to an ATM, there is one in the Thai town of Hat Lek. Expect to pay 80B – 100B for a moto from Ko Kong town to the border — this should include the bridge toll.

Chong Jom / O Smach
This crossing is convenient to Surin in Thailand and Siem Reap in Cambodia. There are a half dozen buses a day from Surin to the border (and back) with the trip taking a couple of hours. On the Khmer side you can either grab a share taxi to Siem Reap or get to Samraong first, from where you can either continue onto Siem Reap by share taxi or head east for Anlong Veng.

Chong Sa Ngam / Anlong Veng
This crossing is very convenient to Anlong Veng but little else. If you are heading to Thailand via this crossing, there is no public transport from the border to any sizeable Thai towns, so you will need to hitch a ride from the border for around 20km to a sealed road, from where occasional public buses pass. You are better off hitching at least as far as Route 24, along which there are very frequent buses.

Ban Pakard / Phsa Prum
This little utilized border is a 30-minute motorbike ride from Pailin and from the Thai side there are frequent minibuses to Chanthaburi an hour or so away. Cambodian visas on arrival are available.

Ban Laem / Daun Lem
Close to the Ban Pakard, Chantaburi/Phsa Prum, Pailin crossing, this very little-used border is about 45 minutes from Pailin and on the Thai side there are songthaeaw services to Chanthaburi. The Ban Pakard/Phsa Prum crossing is your better bet.

Cambodia/Vietnam borders:
Bavet / Moc Bai
This was the first crossing between Cambodia and Vietnam to open to foreign travellers and it remains easily the most popular. Daily buses regularly ply the Saigon – Phnom Penh route and the service is both fast and affordable. Cambodian visa on arrival is available here, but Vietnamese visas must be arranged in advance.

Kaam Samnor / Ving Xuong
This very popular riverine crossing links Phnom Penh with the Vietnamese town of Chau Doc. Both slow and fast boat services are available. When you arrive at the border, a fixer will generally gather up all the passports and head into the immigration office to do all the paperwork. You’re welcome to accompany them, but it’s not essential.

Phnom Den / Tinh Bien
Midway between Ha Tien and Chau Doc, this crossing is open to foreign travellers and Cambodian visas on arrival are available. The closest town on the Khmer side is Kampot or Takeo — but both are a couple of hours away. There are buses from Ha Tien to the border, though a motorbike ride is far faster. On the Cambodian side, transport is a bit sparse and travellers have reported paying upto $55 for a taxi from the border town of Phnom Den to Kampot.

Prek Chak / Xa Xia
Yes, the Cambodia/Vietnam coastal border crossing is open and travellers with a valid Vietnamese visa can enter Vietnam at the Prek Chak/Xa Xia crossing, a 20-minute motorbike ride from Kep. A moto to the border from Kep costs around US$7 and onwards transport to Ha Tien in Cambodia is available. Cambodian visas on arrival are available.

Le Thanh / O Yadao crossing
This remote crossing links Ban Lung in northeast Cambodia to Pleiku in Vietnam, with a through trip between the two taking about six hours. From the Vietnamese side, buses run from Pleiku to Duc Co, from where you’ll need to grab a xe om for the last 20km to the border. From the border to Ban Lung is a trip of about 70km. Expect to pay US$15-20 to charter a car for the run, $10-15 by moto.