A quick guide on getting to Vietnam
The easiest way to cross the border is to fly. Currently there are two entrance points, the Noi Bai Airport in Hanoi and Tan Son Nhat in Ho Chi Minh City. However, it is possible to enter and leave Vietnam by land. Learn more on Overland border crossing to Vietnam
Crossing the border to Cambodia
Cambodia visa on arrival is available on international check points and the airports. Entering the country from Vietnam by bus is easily the cheapest way to get to Phnom Penh.
Traveler can can have exit port changed to Moc Bai at the immigration office in Saigon. Be prepared for at least an hour wait on each side of the border. The bus arrives in Phnom Penh around 4:00 or 5:00 pm.
Getting to Laos
The border crossing at Lao Bao is possible, at least coming from Laos. From the border to the bus station take a motorbike costing 30000 VND or so. The ride takes only a couple of minutes.