Siem Reap to Phnom Penh is one of Cambodia\’s most-traveled domestic routes — and it\’s straightforward. The bus journey takes 5–6 hours on a comfortable express service, or you can fly in under an hour. Most travelers do it at least once when combining Angkor Wat with the capital. Here\’s what to know.
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Option 1: Bus (Best Value)
Express buses from Siem Reap to Phnom Penh take approximately 5–6 hours on National Road 6. Operators including Giant Ibis, Mekong Express, and Virak Buntham run this route with modern air-conditioned coaches and onboard WiFi on premium services. Departure times are spread throughout the morning.
- Giant Ibis: Premium operator, onboard WiFi and snacks, $15–18 USD. Departs from dedicated terminal.
- Mekong Express: Reliable mid-range option, $9–12 USD.
- Virak Buntham: Budget option, $6–9 USD, more basic coaches.
All buses drop passengers in Phnom Penh near the riverside or central bus station, walkable or short Grab ride from most guesthouses.
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Option 2: Flight (Fastest)
Cambodia Angkor Air operates the Siem Reap (SAI) to Phnom Penh (PNH) route in approximately 45 minutes. Prices from ~$60–90 USD one way. Worth it if time is tight or you want to avoid the road journey — though you lose the countryside scenery and add airport transfer time at both ends.
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Quick Comparison
| Option | Time | Cost from | Best for |
|---|---|---|---|
| Giant Ibis bus | ~5–6 hours | ~$15 USD | Comfort + value |
| Budget bus | ~5–6 hours | ~$6 USD | Cheapest |
| Flight | ~45 min + transfers | ~$60 USD | Speed |
Where to Stay in Phnom Penh
- Riverside (Sisowath Quay): Most atmospheric, close to Royal Palace and museums. Best for first-timers.
- BKK1: Expat-popular, best cafes and restaurants, slightly removed from tourist sights.
- Toul Tompoung: Local feel, Russian Market nearby, budget-friendly.
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