A 30-day visa can be obtained on arrival at international airports in Phnom Penh and Siem Reap, road and river crossings, also by land destination from Laos and Vietnam. The formality is very simple; the form is usually given on the plane before landing.
From Thailand: Koh Kong, Poipet.
From Vietnam: Bavet (MocBai), Chau Doc (Ka-omSamnor), Phnom Den.
From Laos: By Dom Krolor road. Prepare an ID photo.
Warning: The passport must havea period of validity of 6 months to the date of entry in Cambodia.
Cost: Base price at airport: USD30. Euros are accepted at airports.
There is a supplement of stamping $ 2-5 in all land and river border crossings: Arrival from Laos by route: Dong Krolor, $ 2 per person. Arrival from Vietnam by Mekong: at Chau Doc, $ 5 person for the service. The client just presents the passport and $ 5, the rest is arranged by ship personnel with the police. Arrival from Thailand by road: At Poipet $ 5 per person Assistance VISA
Note: The Cambodian Ministry of Foreign Affairs and International Cooperation has created the e-Visa can be issued on their website. https://www.evisa.gov.kh/ . Fill the form online and pay by credit card. Visa is sent by email.