$217 Cheap Flights from Phnom Penh (PNH) to Sihanoukville (KOS)

View $217 flight on Sun, Oct 12, 2025Opens in a new window

Popular airlines from Phnom Penh Intl. Airport (PNH) to Sihanoukville (KOS)

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Cheap Flights from Phnom Penh to Sihanoukville (PNH-KOS)

Prices were available within the past 7 days and start at $217 for one-way flights and $406 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Cambodia
Thu, Sep 4 - Sat, Sep 6
PNH
Phnom Penh
KOS
Sihanoukville
$406 Roundtrip, found 2 days ago
$406
Roundtrip
found 2 days ago
Select Air Cambodia flight, departing Thu, Sep 4 from Phnom Penh to Sihanoukville, returning Sat, Sep 6, priced at $406 found 2 days ago
Air Cambodia
Sun, Aug 31 - Tue, Sep 2
PNH
Phnom Penh
KOS
Sihanoukville
$415 Roundtrip, found 2 days ago
$415
Roundtrip
found 2 days ago
Select Air Cambodia flight, departing Sun, Aug 31 from Phnom Penh to Sihanoukville, returning Tue, Sep 2, priced at $415 found 2 days ago
Air Cambodia
Sat, Aug 30 - Tue, Sep 2
PNH
Phnom Penh
KOS
Sihanoukville
$417 Roundtrip, found 2 days ago
$417
Roundtrip
found 2 days ago
Select Air Cambodia flight, departing Sat, Aug 30 from Phnom Penh to Sihanoukville, returning Tue, Sep 2, priced at $417 found 2 days ago

Alternative airports near Sihanoukville

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sihanoukville KOS. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $415
KOS
Sihanoukville
CheapestClosest
Average driving time to city center17 min
Flights from $415
Flights from Phnom Penh (PNH) to Sihanoukville (KOS)
Origin airport
Phnom Penh Intl.
Destination airport
Sihanoukville
Roundtrip price
$406
Distance
105 mi

Phnom Penh to Sihanoukville Flights

The cheapest times to fly from Phnom Penh to Sihanoukville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phnom Penh to Sihanoukville are during the month of September. You can find some of the cheapest flights from Phnom Penh to Sihanoukville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phnom Penh to Sihanoukville

Sunday is one of the best days to book for cheap flights from Phnom Penh to Sihanoukville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phnom Penh to Sihanoukville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phnom Penh to Sihanoukville in 2025. You can also book with separate airlines for your outbound and return journeys, from $217 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phnom Penh to Sihanoukville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phnom Penh to Sihanoukville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS) cost?
Get a cheap one-way flight from $217 or cheap return flight from $406 from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS)?
Planning your trip for September is a good way to save, as it's the cheapest month for flights between PNH and KOS. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS)?
To find the cheapest airline flying from PNH to KOS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS)?
You'll need to book a flight with a layover if you're traveling from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from PNH to KOS?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS)?
To avoid potential delays on the Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS) route, fly before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS) last-minute?
Booking your plane ticket from PNH to KOS just before your trip is typically more expensive. But if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a PNH to KOS flight and hotel package?
Compared with arranging flights and hotels separately, booking a PNH to KOS flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place will take the hassle out of planning your trip. Simply secure your flights and choose from our extensive range of hotels, then tailor your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Phnom Penh Intl. Airport (PNH) to Sihanoukville Airport (KOS)?
Typically, you can cancel or reschedule your PNH to KOS flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need further information, visit our Customer Service portal.

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