PREMIUM
Giant Ibis VIP
VIP 25-seat
3-4x daily
Price
$12-15
WiFi English staff Water + snacks Direct
SE Asia bus route
🇰🇭 Phnom Penh Sihanoukville 🇰🇭
Phnom Penh to Sihanoukville is Cambodia's beach + islands route — 4-5h south via National Highway 4. Giant Ibis + Cambodia Post VIP are the reliable operators — AC + WiFi + English staff. Sihanoukville has been transformed by Chinese investment 2018-2022 — city itself now feels less appealing, but the islands (Koh Rong + Koh Rong Samloem) are the beach heaven. From Sihanoukville, fast boat to Koh Rong 45min + Koh Rong Samloem 30min.
Distance
230 km
Duration
4-5h
Operators
3
Region
SE Asia
Scam-note + booking tips
Book Giant Ibis + Cambodia Post directly on their websites, 12go, or at their offices. Riverside touts in Phnom Penh overcharge tourists 2-3x + oversell to unbranded buses.
Operators comparison
RELIABLE
Cambodia Post VIP
AC 32-seat + reclining
4-5x daily
Price
$8-12
AC Reclining
BUDGET
Local Cambodian buses
Standard AC 40-seat
Price
$5-8
AC
Older + less reliable. Budget-only.
Book Phnom Penh → Sihanoukville
Live schedules + prices. Cancel free 24h before departure.
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Frequently asked
Phnom Penh to Koh Rong journey?
Bus Phnom Penh → Sihanoukville (4-5h, $8-15), then fast boat Sihanoukville pier → Koh Rong (45 min, $25 return). Book combined bus+boat on 12go — saves time + often cheaper than DIY.
Is Sihanoukville still worth visiting?
The city itself is much less appealing since 2018 Chinese casino development — many beaches feel overbuilt. BUT: Koh Rong + Koh Rong Samloem islands 30-45min offshore are still gorgeous — this is what most tourists actually visit. Sihanoukville is a transfer point, not a destination.
Where does the Sihanoukville bus arrive?
Giant Ibis: their office near central Sihanoukville, walkable to fast boat pier (10 min). Cambodia Post: their terminal north of city, tuk-tuk to pier $3-5.
Overnight bus Phnom Penh to Sihanoukville?
Not recommended — the route is 4-5h so overnight sleepers don't exist. Day buses depart 07:00-15:00. Take an afternoon bus + arrive Sihanoukville evening, ferry to islands next morning.