There are no direct flights to Cambodia from Europe, North America, Australasia or South Africa, so if you plan to fly into the country you’ll need to get a connecting flight from elsewhere in Southeast or East Asia.
There are direct flights to Phnom Penh from an increasing number of cities in the region including Kuala Lumpur, Singapore, Seoul, Bangkok, Vientiane, Ho Chi Minh City, and several cities in China (including frequent connections with Hong Kong).
Alternatively, it’s also possible to fly direct to Siem Reap from Singapore, Bangkok, Ho Chi Minh City, Kuala Lumpur and a number of other Asian destinations.
There are numerous land borders into Cambodia open to foreigners from neighbouring Thailand, Vietnam and Laos. Visas at all are issued on arrival.