Speed Ferry Cambodia has sailings from Sihanoukville to Koh Rong Sanloem and Koh Rong at 9am, 11.30am and 3pm. There's also a slow boat at 9.30am. Return trips from both islands are at 10am, 12.30pm and 4pm.
Ferries depart Sihanoukville for Saracen Bay, M'Pai Bay and Koh Rong at 9am, noon and 3pm. They return from Koh Rong at 10.30am, 1.30pm and 4.30pm (with stops at M'Pai Bay and Saracen Bay).
Departures to Ha Tien, Vietnam (US$13, 3½ hours), via Kampot (US$5) and Kep (US$7) at 8am, 11am, 1.30pm and 3.30pm.
Organises buses to Ha Tien (Vietnam) via Kampot and Kep, and also does the usual tours and visas.
In addition to public fast boats to Koh Rong and Koh Rong Sanloem, also offers private boat hire.
First-class speed ferries between Sihanoukville, Koh Rong and Koh Rong Sanloem.
Luxury buses to Phnom Penh, Siem Reap, Ho Chi Minh City and Bangkok.
Has one daily direct flight from Sihanoukville Airport to Siem Reap.