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£205 Cheap Flights from Sihanoukville (KOS) to Bangkok (BKK)

View £205 flight on Sat, 15 Aug 2026Opens in a new window

Popular airlines from Sihanoukville (KOS) to Suvarnabhumi International Airport (BKK)

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Cheap Flights from Sihanoukville (KOS) to Bangkok (BKK)

Prices were available within the past 7 days and start at £205 for one-way flights and £375 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Cambodia
Sun, 6 Sept - Sun, 13 Sept
KOS
Sihanoukville
BKK
Bangkok
£375 Return, found 1 day ago
£375
Return
found 1 day ago
Select Air Cambodia flight, departing Sun, 6 Sept from Sihanoukville to Bangkok, returning Sun, 13 Sept, priced at £375 found 1 day ago
Air Cambodia
Wed, 19 Aug - Tue, 25 Aug
KOS
Sihanoukville
BKK
Bangkok
£384 Return, found 4 days ago
£384
Return
found 4 days ago
Select Air Cambodia flight, departing Wed, 19 Aug from Sihanoukville to Bangkok, returning Tue, 25 Aug, priced at £384 found 4 days ago
Air Cambodia
Sun, 6 Sept - Sun, 13 Sept
KOS
Sihanoukville
BKK
Bangkok
£386 Return, found 1 day ago
£386
Return
found 1 day ago
Select Air Cambodia flight, departing Sun, 6 Sept from Sihanoukville to Bangkok, returning Sun, 13 Sept, priced at £386 found 1 day ago
Air Cambodia
Wed, 19 Aug - Tue, 25 Aug
KOS
Sihanoukville
BKK
Bangkok
£425 Return, found 4 days ago
£425
Return
found 4 days ago
Select Air Cambodia flight, departing Wed, 19 Aug from Sihanoukville to Bangkok, returning Tue, 25 Aug, priced at £425 found 4 days ago
Air Cambodia
Thu, 18 Feb - Sat, 6 Mar
KOS
Sihanoukville
BKK
Bangkok
£429 Return, found 4 days ago
£429
Return
found 4 days ago
Select Air Cambodia flight, departing Thu, 18 Feb from Sihanoukville to Bangkok, returning Sat, 6 Mar, priced at £429 found 4 days ago
Air Cambodia
Thu, 18 Feb - Sat, 6 Mar
KOS
Sihanoukville
BKK
Bangkok
£441 Return, found 4 days ago
£441
Return
found 4 days ago
Select Air Cambodia flight, departing Thu, 18 Feb from Sihanoukville to Bangkok, returning Sat, 6 Mar, priced at £441 found 4 days ago
Air Cambodia
Thu, 18 Feb - Sat, 6 Mar
KOS
Sihanoukville
BKK
Bangkok
£442 Return, found 4 days ago
£442
Return
found 4 days ago
Select Air Cambodia flight, departing Thu, 18 Feb from Sihanoukville to Bangkok, returning Sat, 6 Mar, priced at £442 found 4 days ago
Air Cambodia
Thu, 18 Feb - Sat, 6 Mar
KOS
Sihanoukville
BKK
Bangkok
£454 Return, found 4 days ago
£454
Return
found 4 days ago
Select Air Cambodia flight, departing Thu, 18 Feb from Sihanoukville to Bangkok, returning Sat, 6 Mar, priced at £454 found 4 days ago

Frequently asked questions

How much does a flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) cost?
You can find one-way and return flights from KOS to BKK with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when KOS to BKK ticket fares go up or down.
What is the cheapest month to fly from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
The cheapest months to fly from KOS to BKK are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
Enter KOS to BKK and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
To find a cheap flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
There are approximately 1 connecting flight per day from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.). Some common connection points include Tan Son Nhat Intl. (SGN), Shenzhen Intl. (SZX), and Siem Reap Angkor Intl. Airport (SAI).
What is the earliest flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
The earliest flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) typically departs at around 9:50 AM local time. This service is operated by Cambodia Angkor Air and Vietnam Airlines. This is a seasonal service, active only in April. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
You'll typically find the most flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) on a Wednesday, with around 1 flight available. Cambodia Angkor Air operates on this route. Flight schedules are consistent throughout the week, so you'll find similar options on other days too.
What are the most popular departure times for flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
The most popular departure times for flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) are in the morning, between 9am and 12pm. Cambodia Angkor Air offers flights during this window. Many travellers prefer this timing as it allows for an early start to your journey, getting you to your destination with plenty of time left in the day.
How long does it take to fly from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
There are no nonstop flights from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.). If you're looking for a flight with one stop, the journey typically takes around 8 hours 48 minutes. Flights with two or more stops usually take longer, averaging about 25 hours. Keep in mind that these are average travel times, and your actual flight duration can vary depending on the specific route, layover times, and even factors like wind patterns.
Can you fly business or first class from Sihanoukville (KOS) to Bangkok (BKK)?
Select the "Business class" and "First class" filters when looking for Sihanoukville (KOS) to Bangkok (BKK) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) flight with Expedia?
It's easy to earn miles on a Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Bangkok (BKK) from Sihanoukville (KOS)?
If you're planning to travel to Bangkok from KOS, you can fly directly into Suvarnabhumi Intl. (BKK). Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) at the last minute?
Typically, booking a last minute flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) flight and hotel package?
Securing a Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.)?
If you booked your Sihanoukville (KOS) to Bangkok (BKK-Suvarnabhumi Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sihanoukville
Destination airport
Suvarnabhumi Intl.
Return price
£375
Distance
464 km

Book with confidence

Compare flights from Sihanoukville to Bangkok easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Sihanoukville to Bangkok. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Suvarnabhumi Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Sihanoukville to Suvarnabhumi Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Sihanoukville (KOS) to Suvarnabhumi Intl. (BKK)

The easiest way to view the best deals on flights from Sihanoukville to Bangkok today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Sihanoukville to Suvarnabhumi Intl. start at just £375 and range up to £454.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Sihanoukville and Bangkok
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Sihanoukville to Bangkok flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Sihanoukville to Suvarnabhumi Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Sihanoukville to Bangkok easily and book with confidence

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