From the category archives:
Sorya Transport Company Daily Travels to Sihanoukville and Siem Reap Central Bus Station 023 210 359
Sok Sokha Express Daily Travels to Sihanoukville, Siem Reap and Battambang 121 Sisowath Quay 023 991 414
Rith Mony Bus Service Daily Travels to Siem Reap and Sihanoukville 137CD Street 118 023 991 329
Paramount Angkor Express Three trips t Siem Reap Two trips to Sihanoukville 24E Street 102 023 427 567
Neak Krorhorm Daily Travels to Siem Reap and Saigon 127 Street 108 023 219 496
Mai Linh Daily Travels to Siem Reap and Saigon 391 Sihanouk Blvd 023 211 888
Hour Sokha Daily Travels to Siem Reap 125 Sisowath Quay 012 671 588
GST Bus Daily Travels to Sihanoukville, Siem Reap, Battambang, Poipet and Saigon Central Bus Station 012 895 550
Capitol Tours Daily Travels to Sihanoukville, Siem Reap, Battambang, Poipet, Bangkok and Saigon 14A Street 182
Cambodia Asia Travel Company Daily travels to Sihanoukville, Siem Reap and Saigon on the Mekong Express. 87 Sisowath Quay 023 427 518