Mad Monkey Cambodia: How to Get from Sihanoukville to Siem Reap (2026)

TL;DR:

Here’s a quick comparison of the ways to make the journey, including travel times and estimated costs:

*Prices are indicative booking estimates, not fixed fares. They vary by operator, vehicle, departure date, and availability. Allow additional time for airport transfers when flying.

Mad Monkey Reco: The direct sleeper bus is a practical choice if you’re watching your spending. Flying makes more sense if you find a convenient departure and would rather spend your time exploring Siem Reap than watching the Cambodian highway roll past.

How Do You Get from Sihanoukville to Siem Reap by Bus?

Let’s start with the option that makes the most sense for many backpackers: the bus.

It’s not exactly a quick hop between destinations. You’re looking at roughly 9–11 hours on the road, depending on the operator and service you book. But you can travel directly without organising a separate connection in Phnom Penh.

There are daytime and overnight bus services available, so you can choose whether you’d rather watch Cambodia roll past your window or attempt to get some sleep while covering the distance.

Direct bus tickets start at around ៛53,000 ($13 USD), while overnight sleeper bus tickets generally cost between ៛77,000 and ៛142,000 ($19–$35 USD).

Which Bus Companies Travel from Sihanoukville to Siem Reap?

A few operators serve this route. Here are some worth comparing before you book.

Giant Ibis Transport

If comfort is high on your list, Giant Ibis is worth investigating. Its published Sihanoukville–Siem Reap route takes approximately 11 hours, with a scheduled overnight departure at 7:00 PM.

The bus departs from the Giant Ibis ticket office on Phe Street, Sangkat 3, near Sihanoukville Autonomous Port. In Siem Reap, it arrives at the Giant Ibis terminal behind the Old Stadium, close to Pub Street.

A few useful onboard features include:

• Single and double sleeper bunks
• Wi-Fi and power outlets
• An onboard toilet on its night buses
• Water, a cold towel, pillow and blanket
• A crew attendant during the journey

One detail worth checking when booking: complimentary pickup isn’t available for its night bus departures. You’ll need to arrange your own ride to the departure point.

You can check departure details and book directly through the Giant Ibis Sihanoukville to Siem Reap route page.

Vireak Buntham Express

Another operator worth comparing is Vireak Buntham Express, which runs sleeper services between Sihanoukville and Siem Reap.

Its Luxury Hotel Bus service offers single and double sleeping arrangements on selected departures. Overnight services generally depart between 6:45 PM and 9:30 PM, with journey times of approximately 9–11 hours. Tickets start at around ៛80,000 ($19.71 USD).

Before booking, check the exact sleeping arrangement. Some sleeper buses have shared double-width beds rather than individual bunks, which may not be what you expect when booking a sleeper ticket.

You can compare available departure times and fares through Vireak Buntham’s night bus listings.

Should You Take a Daytime or Overnight Bus?

This is where your itinerary comes into play.

If you’d rather save yourself a night of accommodation, an overnight sleeper is a sensible choice. You can leave Sihanoukville in the evening and arrive in Siem Reap the following morning.

The downside? Sleeping on a moving bus isn’t everyone’s idea of a restful night. Road noise, air conditioning, and shared sleeping arrangements can make it harder to get proper rest.

A daytime service is a different story. You’ll spend most of the day travelling, but you can watch the countryside pass by and avoid trying to sleep through every bump in the road.

Mad Monkey Tip: If you’re booking a sleeper bus, check the bed arrangement before choosing your berth. A single sleeper is worth considering if you don’t fancy sharing sleeping space with a stranger. Bring a light jacket, too. Bus air conditioning can get surprisingly chilly overnight.

How Do You Get from Sihanoukville to Siem Reap by Plane?

Not particularly keen on spending 10 hours on a bus? Fair enough. There’s always the option of flying.

Direct flights operate between Sihanoukville International Airport (KOS) and Siem Reap–Angkor International Airport (SAI). The flight takes approximately 55 minutes to 1 hour and 10 minutes, depending on the airline and scheduled service.

Direct flights are available on selected dates through Air Cambodia and Cambodia Airways. Schedules and fares vary, so check availability for your travel dates before booking.

Here’s what you’ll need to know:

• Departure: Sihanoukville International Airport (KOS)
• Arrival: Siem Reap–Angkor International Airport (SAI)
• Flight duration: Approximately 55–70 minutes
• Airlines: Air Cambodia and Cambodia Airways, subject to availability
• Ticket price: Check date-specific fares before booking

The biggest advantage is the time you’ll save. Instead of spending most of the day travelling, you’ll have more time to explore Siem Reap.

There is one small catch, though. Siem Reap–Angkor International Airport isn’t right in the middle of town. It’s approximately 50 kilometres from the city centre, so you’ll need to arrange onward transport after landing.

You can take the official airport shuttle bus for approximately ៛32,000 ($8 USD) per person, one way, or arrange a private transfer. The journey to Siem Reap takes around an hour, but the shuttle operates on a fixed timetable rather than leaving whenever passengers arrive. Check the official Siem Reap Airport Shuttle Bus website for current departure times and booking information.

Can You Travel from Sihanoukville to Siem Reap via Phnom Penh?

Another option is to break the journey in Phnom Penh, travelling by bus or minivan from Sihanoukville before changing to a second bus bound for Siem Reap.

Several transport operators offer services along both legs, giving you more flexibility with departure times. The first journey from Sihanoukville to Phnom Penh takes approximately 3–4.5 hours, while the second leg to Siem Reap takes around 6 hours. Depending on your connection, the entire trip can take 10–14 hours or longer.

Here’s how the journey works:

1. Sihanoukville to Phnom Penh: Take a bus or minivan to the capital. Giant Ibis, for example, publishes afternoon and evening departures.
2. Phnom Penh to Siem Reap: Transfer to another bus or minivan. Giant Ibis offers several daytime departures, as well as overnight services.

If you have a few hours between connections, you could use the opportunity to explore Phnom Penh. Sisowath Quay, the Royal Palace area and Bassac Lane are worth considering, provided you have enough time to get back to your departure point.

Mad Monkey Tip: If you’re purchasing two separate tickets, don’t assume the second bus will wait if your first journey runs late. Allow a generous connection window, especially if you’re travelling during busy periods.

You can compare departure times and fares directly with Giant Ibis Transport and other operators before booking.

Taking the Phnom Penh route is a good option if you want to break up the journey and spend some time exploring Cambodia’s capital. But if Siem Reap is your only destination, booking a direct bus will save you the hassle of changing vehicles and coordinating separate departures.

Where Should You Stay in Siem Reap After the Journey?

Once you’ve made it to Siem Reap, you’ll want somewhere that puts you close to the action. From exploring Angkor Wat to wandering around Pub Street after dark, choosing the right base can make a difference.

Mad Monkey Siem Reap is a great base for travellers who want a social atmosphere, opportunities to meet fellow backpackers and easy access to the city’s nightlife. It’s a good place to swap travel stories, find people to explore the temples with and make plans for the evening.

You’re also within reach of Pub Street, the Old Market (Phsar Chas) and the riverside area, so you can explore Siem Reap without spending your entire budget on tuk-tuk rides.

Whether you’re arriving after an overnight bus or flying in from Sihanoukville, drop your bags, get your bearings, and ease into the social pulse of the city.

Ready to settle in? Explore Mad Monkey Siem Reap for a social stay, then get your temple plans sorted with our How to Visit Angkor Wat: First-Timer’s Guide 2026.

Ready for Your Siem Reap Adventure?

Whether you take an overnight sleeper bus, catch a flight or make a stop in Phnom Penh, the journey from Sihanoukville is just the beginning.

There’s plenty waiting on the other side. Think sunrise over Angkor Wat, wandering through the colourful stalls of Old Market, sampling Khmer dishes, exploring hidden cafés and seeing where the evening takes you around Pub Street. And that’s before you’ve even scratched the surface of what Siem Reap has to offer.

So, pack your bags, pick your route, and get ready for a change of scenery. From coastal views to ancient wonders, Siem Reap is calling. Safe travels!

FAQs: How to Get from Sihanoukville to Siem Reap

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