$456 Cheap Flights from Colombo (CMB) to Samui Intl. Airport (USM)

View $456 flight on Mon, Dec 1, 2025Opens in a new window

Popular airlines from Bandaranaike Intl. Airport (CMB) to Samui Intl. Airport (USM)

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Cheap Flights from Colombo to Samui Intl. Airport (CMB-USM)

Prices were available within the past 7 days and start at $456 for one-way flights and $757 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$757 Roundtrip, found 20 hours ago
$757
Roundtrip
found 20 hours ago
Select Cathay Pacific flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $757 found 20 hours ago
Thai Airways International
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$786 Roundtrip, found 20 hours ago
$786
Roundtrip
found 20 hours ago
Select Thai Airways International flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $786 found 20 hours ago
Thai Airways International
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$790 Roundtrip, found 20 hours ago
$790
Roundtrip
found 20 hours ago
Select Thai Airways International flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $790 found 20 hours ago
Thai Airways International
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$796 Roundtrip, found 20 hours ago
$796
Roundtrip
found 20 hours ago
Select Thai Airways International flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $796 found 20 hours ago
Thai Airways International
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$800 Roundtrip, found 20 hours ago
$800
Roundtrip
found 20 hours ago
Select Thai Airways International flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $800 found 20 hours ago
SriLankan Airlines
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$815 Roundtrip, found 20 hours ago
$815
Roundtrip
found 20 hours ago
Select SriLankan Airlines flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $815 found 20 hours ago
SriLankan Airlines
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$819 Roundtrip, found 20 hours ago
$819
Roundtrip
found 20 hours ago
Select SriLankan Airlines flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $819 found 20 hours ago
SriLankan Airlines
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$825 Roundtrip, found 20 hours ago
$825
Roundtrip
found 20 hours ago
Select SriLankan Airlines flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $825 found 20 hours ago
Singapore Airlines
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$997 Roundtrip, found 20 hours ago
$997
Roundtrip
found 20 hours ago
Select Singapore Airlines flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $997 found 20 hours ago
Malaysia Airlines
Thu, Nov 6 - Wed, Nov 12
CMB
Colombo
USM
Koh Samui
$1,030 Roundtrip, found 20 hours ago
$1,030
Roundtrip
found 20 hours ago
Select Malaysia Airlines flight, departing Thu, Nov 6 from Colombo to Koh Samui, returning Wed, Nov 12, priced at $1,030 found 20 hours ago

Frequently asked questions

How much does a flight from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) cost?
Snag a cheap one-way flight from $456 or cheap return flight from $757 from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)?
The cheapest month to fly from CMB to USM is November, when demand is low. Off-peak months are usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest CMB to USM flight.
How many flights per day from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)?
Nonstop flights from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CMB to USM?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)?
Opt for a flight from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) that leaves before 3 PM to reduce the likelihood of delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) last-minute?
Booking your flight from CMB to USM just before your getaway is usually more expensive. However, if there's some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a CMB to USM flight and hotel package?
You can save money by booking a CMB to USM flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After choosing your ideal flights and accommodations, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)?
Typically, you're able to cancel or reschedule your CMB to USM flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, head to our Customer Service portal.

Travel information

Origin airport
Bandaranaike Intl.
Destination airport
Samui Intl. Airport
Roundtrip price
$756
Distance
1388 mi

Book with confidence

Colombo to Samui Intl. Airport Flights

The cheapest times to fly from Colombo to Samui Intl. Airport

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 Colombo to Samui Intl. Airport are during the month of November. You can find some of the cheapest flights from Colombo to Samui Intl. Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Colombo to Samui Intl. Airport

Sunday is one of the best days to book for cheap flights from Colombo to Samui Intl. Airport: 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 Colombo to Samui Intl. Airport

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 Colombo to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $456 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 Colombo to Samui Intl. Airport 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 Colombo to Samui Intl. Airport 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.

 

Colombo to Samui Intl. Airport Flights
*Available to One Key members.