Buses are the most popular means of overland transport from Phnom Penh. The roads are in good condition (except for short stretches of road repair) and there are dozens of daily buses in both directions, taking 5-7 hours.

Cheapest, standard buses provide a/c and sometimes on-board toilet. Some companies, such as Giant Ibis and Mekong Express, have deluxe buses and mini-buses offering a better level of service and comfort.

Generally speaking it is easiest to buy tickets through an agency. Phnom Penh does not have a centralized bus station.

Buses from different companies depart from different stations. In Siem Reap the Chong Kov Sou station is located 7km west of town center. On arrival, motodups from the station into town run $1.50-$2 and tuk-tuks for $3. For departing passengers, most companies offer a free shuttle service to the bus.