Siem Reap to Phnom Penh is one of Cambodia\’s busiest travel corridors. Once you\’ve explored Angkor Wat and the temples, most travellers head south to the capital before continuing to the coast or crossing into Vietnam. The journey has never been easier thanks to the new expressway, which brings bus times down to around 4–5 hours.
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ℹ️ Phnom Penh\’s main transport hub for onward connections is Phnom Penh International Airport (PNH) and the central bus stations near the riverside. Most buses drop you centrally.
Option 1: Express Bus
The express bus is the standard and most practical choice. Giant Ibis, Mekong Express, and Larryta all operate comfortable, air-conditioned coaches with multiple daily departures. Pick-up is often available from your guesthouse or hotel in central Siem Reap.
- Journey time: 4–6 hours (expressway route: 4–5 hours)
- Price: $6–15 USD depending on operator
- Departures: Multiple daily, morning and early afternoon
- Drop-off: Central Phnom Penh (Riverside / Boeung Keng Kang area)
Giant Ibis remains the top-rated operator on this route — comfortable seats, on-time record, and included snacks and water. Book directly on their website or via 12Go.
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Option 2: Minivan
Shared minivans are faster but far less comfortable. They typically cram more passengers than the vehicle was designed for and drive aggressively. Fine for budget travellers, but a poor experience over 5+ hours.
- Journey time: 4–5 hours
- Price: $5–8 USD
- Comfort: Low — bring earplugs and a neck pillow
Option 3: The Boat (Siem Reap → Phnom Penh)
The speedboat service down the Tonle Sap is most enjoyable going northbound (Phnom Penh to Siem Reap) when the scenery opens up. Southbound works the same way in high water season and offers the same floating village views.
- Journey time: 4–6 hours (high season) — can be longer in dry season
- Price: $35–45 USD
- Season: Best June–December; limited or cancelled January–May
⚠️ Verify departure status before booking in January–May. Water levels on the Tonle Sap drop significantly and the service may not operate or can take 8+ hours.
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Option 4: Flight
Domestic flights between Siem Reap (REP) and Phnom Penh (PNH) take about 45 minutes. With the bus now a comfortable 4–5 hour journey, flights mainly make sense if you\’re pressed for time or have a connecting international flight from Phnom Penh.
- Journey time: 45 minutes
- Price: $50–120 USD
- Note: Siem Reap\’s new international airport (SAI) opened in 2023 — check which airport your flight uses
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Journey Summary
| Method | Time | Cost from | Best for |
|---|---|---|---|
| Express bus | 4–6 hours | $6 USD | Most travellers |
| Minivan | 4–5 hours | $5 USD | Budget only |
| Speedboat | 4–6 hours | $35 USD | Scenic, wet season |
| Flight | 45 min | $50 USD | Speed / connections |
Where to Stay in Phnom Penh
The Riverside area (near the Royal Palace) and BKK1 (Boeung Keng Kang) are the most popular neighbourhoods for travellers. Both have a wide range of guesthouses, mid-range hotels and restaurants.
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Frequently Asked Questions
What is the best way to travel from Siem Reap to Phnom Penh?
For most travellers, the express bus with Giant Ibis or Mekong Express is the best option — comfortable, affordable, and takes around 4–5 hours on the expressway. Only consider the boat if you\’re travelling in wet season and want the Tonle Sap experience.
Which airport does Siem Reap use now?
Siem Reap now has a new international airport — Siem Reap Angkor International Airport (SAI) — which opened in 2023 and handles most international flights. The old airport (REP) is no longer the primary hub. Check which airport your flight uses when booking.
Can I do Siem Reap to Phnom Penh in one day?
Yes easily. Take an early morning bus (7:00–8:00 AM departure) and you\’ll be in Phnom Penh by early afternoon. Plenty of time to check in and explore the Riverside or visit the Royal Palace.
Related Guides
- Phnom Penh to Siem Reap: All Options Explained
- Phnom Penh to Sihanoukville: Bus and Transport Guide
- Phnom Penh to Koh Rong: How to Get There
- Siem Reap to Bangkok: Bus and Flight Guide
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