Beware of scams when entering Cambodia overland. Most common is the inflation of the visa fee from the official US$20 to 1000 baht US$30+ charged by Cambodian custom officers but it is easy to deal with. In Poipet which is a visa-free zone, you can always change your Thai bahts into US dollars with cigarette vendors or restaurants. Insist to pay your visa with US dollars. When dealing with custom officers, standing firm and keeping smiling will give you a long way to go. If you don't have an ID photo for the application of visa, don't let them charge you more than 2 dollars. You can also get your visa in advance - either from a Cambodian embassy/consulate via an agency if necessary or from the e-Visa website. See the Visas section for full details.
Past scams have included telling travelers they have to get visas from a consulate at inflated prices before going to the border not true, fines for not presenting a vaccination certification even though this is not mandatory, charging 50 baht for a bogus SARS health form, and enforcing an imaginary US$100 to Cambodian riel exchange requirement at lousy rates.
Note, in the list of borders below, the Cambodian town comes second. E.g. Aranyaprathet is in Thailand; Poipet is in Cambodia
International departure tax
From 1 April 2011, tickets for departing Cambodia will include an addtional airport departure tax of US$25, or US$17 for Cambodians
Cambodia has international airports at Phnom Penh and Siem Reap.
Direct flights connect Phnom Penh International Airport (http://www.cambodia-airpo...) previously Pochentong International Airport with mainland China Beijing, Guangzhou, France Paris, Hong Kong, Laos Vientiane, Malaysia Kuala Lumpur, Singapore, South Korea Incheon, Taiwan Taipei, Thailand Bangkok and Vietnam Ho Chi Minh City.
Direct flights connect Siem Reap - Angkor International Airport (http://www.cambodia-airpo...) with Laos Pakse, Vientiane, Malaysia Kuala Lumpur, Singapore, South Korea Incheon, Busan, Thailand Bangkok and Vietnam Hanoi, Ho Chi Minh City.
Travellers going specifically to visit the Angkor temple ruins may prefer to use Siem Reap as it's only a few minutes away from the main sites; however as Bangkok Airways has a monopoly on direct flights between Bangkok and Siem Reap, it's a lot cheaper to fly to Phnom Penh and to take the bus or cross overland from Bangkok.
Low-cost carrier Air Asia (http://www.airasia.com) has introduced flights from Kuala Lumpur and Bangkok to Phnom Penh and Kuala Lumpur to Siem Reap. Tiger Airways (http://www.tigerairways.com) now has direct daily flights between Singapore and Phnom Penh, while Jetstar Asia (http://www.jetstarasia.com) has begun flying from Singapore to Siem Reap and Phnom Penh.
Other airlines operating flights to/from Cambodia include Asiana Airlines (http://flyasiana.com/english/), Bangkok Airways (http://www.bangkokair.com), China Southern Airlines (http://www.cs-air.com/en), Dragonair (http://www.dragonair.com), Eva Airways (http://www.evaair.com), Korean Air (http://www.koreanair.com), Lao Airlines (http://www.laoairlines.com), Malaysia Airlines MAS (http://www.malaysiaairlin...), Shanghai Airlines (http://www.shanghai-air.com), Siem Reap Airways (http://www.siemreapairways.com) a subsidiary of Bangkok Airways, SilkAir (http://www.silkair.com), Singapore Airlines (http://www.singaporeair.com), Thai Airways International (http://www.thaiair.com), and Vietnam Airlines (http://www.vietnamairlines.com).
To/from Laos - There is one border crossing for tourists on the Mekong, a 90 minute speedboat ride north of Stung Treng. The border guards have few opportunities for "alternative" income, and will usually try to make a few extra dollars from scamming tourists.
To/from Thailand - There are no ferry services between Cambodia and Thailand. The Sihanoukville - Koh Kong ferry no longer runs.
To/from Vietnam - It's possible to travel between Ho Chi Minh City and Phnom Penh by boat, or by combination of road and boat. Fast boats leave daily from Chau Doc in Vietnam's Mekong Delta and take 5 hours to reach Phnom Penh. Chau Doc is a four hour drive from Ho Chi Minh City. A popular overland route is to make a three day trip, stopping at Can Tho and Chau Doc before taking the boat to Phnom Penh.