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Koh Rong has grown into a famous beach destination, with long white sands and lively nightlife. Khum Kaoh Sdach on Koh Sdach (King Island) is a quieter step away, a fishing village where life moves at a slower pace.
A speedboat links the two islands.[1] Buva Sea runs speedboats from the mainland to Koh Rong and Koh Sdach.[2] You can compare and book on GoAsia.cc.
Koh Rong to Khum Kaoh Sdach by Speedboat
The crossing takes from about 45 minutes, depending on sea conditions and the pier you leave from on Koh Rong. On booking platforms, a ticket costs about $20 (October 2026).[1] The covered seating protects you from sun and spray, and the boat saves you the trip back to Sihanoukville.
As the boat pulls away from Koh Rong you get a last look at its long beaches before the captain opens the throttle. The ride can be bumpy in a swell, so sit towards the back if you are prone to seasickness. At Kaoh Sdach the boat docks near the village, where there is no big tourist infrastructure and you can be settled in a guesthouse well before lunch.
Comparing Your Options
| Mode | Price (USD) | Duration |
|---|---|---|
| Speedboat | About $20[1] | From 45min[1] |
Tips for Traveling from Koh Rong to Khum Kaoh Sdach
- Check the pier: Koh Rong has several piers, such as Koh Touch and Long Set Beach, and they are not all within walking distance. Confirm which one your boat leaves from.
- Protect your luggage: Bags are often stored in an area open to spray. Use a rain cover or a dry bag for valuables.
- Sun protection: The sun reflecting off the water is strong even on a short crossing. Put on sunscreen before boarding.
- Bring cash: There are no ATMs on Koh Rong,[3] so withdraw what you need in Sihanoukville or on the mainland, in US dollars or Cambodian riel.
- Book ahead in high season: Inter-island boats are small and fill up, so book a day or two before you travel.
Frequently Asked Questions
Use the booking tool on this page to compare the transport options currently available from Koh Rong to Khum Kaoh Sdach, including current prices and schedules.
The speedboat, at about $20 for a one-way ticket on booking platforms.
The speedboat, from about 45 minutes.
From about 45 minutes, depending on the weather and sea state.
Yes. A speedboat connects Koh Rong and Khum Kaoh Sdach directly, so you do not have to go back to the mainland.
No. Bring enough cash from Sihanoukville or the mainland to cover your stay, including food and boats.
The speedboat can be bumpy. If you take motion sickness medication, follow the product instructions, and sit towards the back of the boat where the movement is smaller.
Sources and background
Numbers in the text such as [1] refer to these sources.
- [1] 12Go: 12Go Timetable: Koh Rong - Khum Kaoh Sdach. Retrieved October 28, 2026.
- [2] Buva Sea: Buva Sea Cambodia. Retrieved October 28, 2026.
- [3] Island Speed Ferry: Koh Rong: Cambodia Wild Island Paradise. Retrieved October 26, 2026.
Guide prices and journey times are indicative, not live quotes. A booked package may include transfers and waiting time as well as the main journey. Check the selected offer, pickup point and current conditions before booking.