In terms of precipitation, rainfall in Colombo Bandaranaike Intl Airport ranges from 60.0 - 350.0 inches per month. October is typically the wettest month, when rainfall can reach 350.0 mm. February is typically the driest time to visit Colombo Bandaranaike Intl Airport when rainfall is around 60.0 mm.

If weather is an important factor for your trip to Colombo Bandaranaike Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

What is the cheapest time of day to fly from USM to CMB?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ko Samui to Colombo Bandaranaike Intl Airport as you normally would.

What airport do you fly from for flights from Ko Samui to Colombo Bandaranaike Intl?

Ko Samui (USM) is the airport you will fly out of if you book a flight from Ko Samui to Colombo Bandaranaike Intl. You should not have trouble finding flights to Colombo Bandaranaike Intl from Ko Samui; the airport handles an average of 0 outbound flights to Colombo Bandaranaike Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Ko Samui airport to Colombo Bandaranaike Intl. It is only a 3.3 km journey to Ko Samui (USM) from Ko Samui’s city centre.

Can I find deals for flights from Ko Samui to Colombo that include hotel bookings?

Yes. In addition to deals on Ko Samui to Colombo flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Ko Samui to Colombo?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to Colombo.

Can I find deals for business class flights from Ko Samui to Colombo?

Yes. Cheapflights offers flight deals from Ko Samui to Colombo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

฿7,825+ Cheap Flights from Ko Samui to Colombo Bandaranaike Intl Airport

Cheap flight deals from Ko Samui to Colombo

Enter your travel dates to find the best prices.

Cheapest

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One-way

Cheapest flights from Ko Samui to Colombo
Explore the most affordable flight options available from Ko Samui to Colombo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Thu 10/908:00 -

2 stops15h 25m

Wed 16/922:55 -

2 stops20h 00m

Deal found 5/9฿20,123

Fri 2/1008:00 -

2 stops14h 15m

Fri 2/1023:15 -

2 stops11h 10m

Deal found 6/9฿22,819

Sun 25/1008:30 -

1 stop8h 55m

Sun 25/1023:10 -

1 stop9h 45m

Deal found 8/9฿25,022

Thu 10/908:00 -

3 stops36h 00m

Wed 16/910:05 -

2 stops30h 25m

Deal found 5/9฿51,194

Find flight deals from Ko Samui to Colombo

Round-trip from	฿22,819
One-way from	฿7,825

2/10-2/10
4 total stops
25h 25m total
Ko Samui to Colombo

Search Deals

26/10-31/12
2 total stops
31h 45m total
Ko Samui to Colombo

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ko Samui to Colombo Bandaranaike Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Mon 26/10

19:45-09:25

2 stops15h 10m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿8,253

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Thu 3/12

08:15-22:05

2 stops15h 20m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿9,108

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Mon 7/12

07:00-00:01

1 stop18h 31m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿10,061

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Sun 25/10

08:15-00:40

3 stops17h 55m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿13,020

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Fri 2/10

08:00-20:45

2 stops14h 15m

Colombo Bandaranaike Intl

Fri 2/10

23:15-11:55

2 stops11h 10m

฿22,819

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Thu 3/12

16:25-18:25

3 stops51h 30m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿23,739

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Mon 26/10

16:25-10:15

3 stops43h 20m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿23,739

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Mon 7/12

16:25-18:25

3 stops27h 30m

Colombo Bandaranaike Intl

Wed 31/12

00:00-01:30

Nonstop0h 00m

฿23,739

Ko SamuiColombo

USM Ko Samui - CMB Colombo Bandaranaike Intl

USMCMB

Ko Samui

Sun 25/10

08:30-15:55

1 stop8h 55m

Colombo Bandaranaike Intl

Sun 25/10

23:10-11:55

2 stops11h 15m

฿25,153

Flights are sorted by cheapest return flights first.

Deals found on 6/9

Sorted by cheapest first

Best time to book a flight from Ko Samui to Colombo

Have a flexible travel schedule? Discover the best time to fly to Colombo from Ko Samui with our price prediction graph.

USM-CMB

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Ko Samui to Colombo Bandaranaike Intl?
Ko Samui (USM) is the airport you will fly out of if you book a flight from Ko Samui to Colombo Bandaranaike Intl. You should not have trouble finding flights to Colombo Bandaranaike Intl from Ko Samui; the airport handles an average of 0 outbound flights to Colombo Bandaranaike Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Ko Samui airport to Colombo Bandaranaike Intl. It is only a 3.3 km journey to Ko Samui (USM) from Ko Samui’s city centre.
Can I find deals for flights from Ko Samui to Colombo that include hotel bookings?
Yes. In addition to deals on Ko Samui to Colombo flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ko Samui to Colombo?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to Colombo.
Can I find deals for business class flights from Ko Samui to Colombo?
Yes. Cheapflights offers flight deals from Ko Samui to Colombo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from Ko Samui to Colombo Bandaranaike Intl Airport from ฿7,825

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to Colombo

Cheapest flights from Ko Samui to ColomboExplore the most affordable flight options available from Ko Samui to Colombo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Explore the most affordable flight options available from Ko Samui to Colombo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Ko Samui to ColomboDiscover carefully curated flight deals from Ko Samui to Colombo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Discover carefully curated flight deals from Ko Samui to Colombo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Ko Samui to ColomboDiscover last-minute flight deals from Ko Samui to Colombo. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to Colombo. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Ko Samui to ColomboSearch for one-way flight options from Ko Samui to Colombo. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Search for one-way flight options from Ko Samui to Colombo. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

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Use the filters below to find and compare flights from Ko Samui to Colombo Bandaranaike Intl Airport that are best for you.

Best time to book a flight from Ko Samui to Colombo

Have a flexible travel schedule? Discover the best time to fly to Colombo from Ko Samui with our price prediction graph.

Related info for your journey

What airport do you fly from for flights from Ko Samui to Colombo Bandaranaike Intl?

Can I find deals for flights from Ko Samui to Colombo that include hotel bookings?

How can I find direct flights from Ko Samui to Colombo?

Can I find deals for business class flights from Ko Samui to Colombo?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ko Samui to Colombo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Colombo by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Sri Lanka

Book a non-stop flight to one of these other cities located in Sri Lanka.

Search flights from Ko Samui to Colombo by cabin class

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Ko Samui and Colombo flights

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Cheapest flights from Ko Samui to Colombo
Explore the most affordable flight options available from Ko Samui to Colombo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 September 2026.

Best flights from Ko Samui to Colombo
Discover carefully curated flight deals from Ko Samui to Colombo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Ko Samui to Colombo
Discover last-minute flight deals from Ko Samui to Colombo. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Ko Samui to Colombo
Search for one-way flight options from Ko Samui to Colombo. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.