Enter from Vietnam:
From Ho Chi Minh City – Phnom Penh, guests can travel by bus. The tickets cost between US$10 – 12. Bus passengers have to walk between the Cambodian and Vietnamese checkpoints and transfer between two buses, which travel the Cambodian and Vietnamese legs respectively. Obtaining Cambodia Visa at this crossing, it requires only one passport photo. The travellers also can join the Mekong Dalta tour; it costs about US$25 -35 for three days. It travels between two cities, Ho Chi Minh & Phnom Penh. Fast boats leave daily from Chau Doc in Vietnam’s Mekong Delta and take around 5hours to get 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.
Enter from Laos:
From Voeung Kam (Laos) – Dam Kralor (Cambodia) Unfortunately, the transportation is not regularly available. Cambodian Visas available but there will be a transaction charge between $1-3 on both sides of the border.
Travel by boat from/to Laos: There is one border crossing for tourist on the Mekong, a 90 mn speedboat ride north of Stung Treng. But it is noticed that the boat guards usually try to make a few extra dollars from the scamming tourists.
Enter from Thailand:
There are six international border crossings between Cambodia and Thailand. Generally, they open from 7:00AM to 8:00AM and all the crossings have visa-on-arrival facilities at the Cambodian Immigration checkpoints. There are no direct bus services from Thailand that cross the border, but there are many buses to all crossings except Chong Sa-Ngam. On Cambodian side, more basic and less frequent bus services are available from Poipet and Koh kong. To Siem Reap and Battambang – Crossing Aranyaprathet, Thailand – Poipet, Cambodia. The busies land crossing into Cambodia, and the most convenient for forward travel to Siem Reap. The road has finally been paved all the way from the border to Siem Reap and Phnom Penh. To Koh Kong and Sihanouk ville – Crossing Hat Lak and Koh KongTake a bus to Trat and from there a minibus to the border. After crossing into Cambodia, you may have two options – the once-daily boat to Sihanoukville or a minibus or taxi to either Sihanouk ville or Phnom Penh. However, the trip by boat can be unpleasant in adverse weather. Chong Sa Ngam, Si Saket Province, Thailand – Anlong Veng, Cambodia Chong Jom, Surin Province, Thailand – O’ Smach, CambodiaTo Siem Reap – Guests can take minibus from Surin bus station to the border. Once you cross the border, you are in the middle of nowhere and currently there is no bus direct from the border. But the taxi can be available and it takes around 5 hours to Siem Reap on the bumpy road.
However, guests will have chance to witness the great and unique view in the rural away from the tourist area. Be warned, this journey will be more difficult during the rainy season.Ban Pakard, Chanthaburi Province, Thailand – Phra Prom, near Pailin, CambodiaBan Leam, Chanthaburi Province, Thailand – Daun Lem, the geographically closest crossing to Battambang. There are no ferry services between Cambodia and Thailand. But it is possible to cross the border from Thailand to Koh Kong on foot, take a 15 minute share taxi or motor bike taxi ride and then proceed to Sihanuok ville by ferry from there (or vice-versa).