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Flights from Koh Samui to Colombo

Find the cheapest flight options from Koh Samui to Colombo over the next three months. Book one-way tickets from PHP 16,302 and round-trip tickets from PHP 30,977.

      • USM 06:45
        20h 30m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Thu, Jan 22 | Bangkok Airways
        CMB 03:15
        26h 50m
        1 stop
        USM 07:35
        Colombo - Koh Samui | Sun, Jan 25 | Thai AirAsia
        PHP 30,977 PHP 39,564
        22% OFF
        22% OFF
        PHP 39,564 PHP 30,977
      • USM 06:45
        20h 30m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Sat, Feb 7 | Bangkok Airways
        CMB 23:00
        20h 50m
        1 stop
        USM 21:20
        Colombo - Koh Samui | Mon, Feb 9 | Thai AirAsia
        PHP 31,833 PHP 39,564
        20% OFF
        20% OFF
        PHP 39,564 PHP 31,833
      • USM 07:00
        16h 30m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Fri, Dec 19 | Bangkok Airways
        CMB 23:00
        16h 10m
        1 stop
        USM 16:40
        Colombo - Koh Samui | Fri, Dec 26 | Thai AirAsia
        PHP 32,135 PHP 39,564
        19% OFF
        19% OFF
        PHP 39,564 PHP 32,135
      • USM 07:15
        16h 15m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Mon, Feb 2 | Bangkok Airways
        CMB 23:10
        20h 40m
        1 stop
        USM 21:20
        Colombo - Koh Samui | Sun, Feb 8 | Thai AirAsia
        PHP 33,535
        15% OFF
        PHP 39,564 PHP 33,535
      • USM 07:00
        20h 15m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Tue, Dec 16 | Bangkok Airways
        CMB 23:00
        15h 10m
        1 stop
        USM 15:40
        Colombo - Koh Samui | Tue, Dec 23 | Thai AirAsia
        PHP 33,778
        15% OFF
        PHP 39,564 PHP 33,778
      • USM 11:00
        12h 30m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Fri, Jan 9 | Bangkok Airways
        CMB 23:10
        14h 5m
        1 stop
        USM 14:45
        Colombo - Koh Samui | Sat, Jan 17 | Thai AirAsia
        PHP 34,692
        12% OFF
        PHP 39,564 PHP 34,692
      • USM 07:15
        16h 15m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Fri, Jan 2 | Bangkok Airways
        CMB 02:50
        26h 50m
        1 stop
        USM 07:10
        Colombo - Koh Samui | Wed, Jan 7 | Thai AirAsia
        PHP 34,877
        12% OFF
        PHP 39,564 PHP 34,877
      • USM 06:45
        16h 45m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Fri, Dec 12 | Bangkok Airways
        CMB 03:15
        16h 35m
        1 stop
        USM 21:20
        Colombo - Koh Samui | Sun, Dec 14 | Thai AirAsia
        PHP 34,885
        12% OFF
        PHP 39,564 PHP 34,885
      • USM 16:35
        10h 40m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Thu, Jan 1 | Bangkok Airways
        CMB 23:10
        19h 45m
        1 stop
        USM 20:25
        Colombo - Koh Samui | Thu, Jan 8 | Thai AirAsia
        PHP 35,195
        11% OFF
        PHP 39,564 PHP 35,195
      • USM 07:15
        20h
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Thu, Dec 18 | Bangkok Airways
        CMB 23:10
        10h 55m
        1 stop
        USM 11:35
        Colombo - Koh Samui | Thu, Dec 25 | Thai AirAsia
        PHP 35,212
        11% OFF
        PHP 39,564 PHP 35,212
      • USM 13:00
        17h 25m
        1 stop
        CMB Invalid Date
        Koh Samui - Colombo | Fri, Dec 12 | Normal Airline
        CMB 15:00
        6h
        Direct
        USM 16:00
        Colombo - Koh Samui | Sun, Dec 14 | Normal Airline
        Find More Flights
        Find More Flights
      • USM 18:40
        28h 50m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Wed, Jan 28 | Bangkok Airways
        PHP 16,302 PHP 21,031
        22% OFF
        22% OFF
        PHP 21,031 PHP 16,302
      • USM 19:35
        27h 55m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Wed, Dec 31 | Bangkok Airways
        PHP 17,527 PHP 21,031
        17% OFF
        17% OFF
        PHP 21,031 PHP 17,527
      • USM 06:45
        16h 45m
        1 stop
        CMB 22:00
        Koh Samui - Colombo | Thu, Jan 22 | Bangkok Airways
        PHP 17,963 PHP 21,031
        15% OFF
        15% OFF
        PHP 21,031 PHP 17,963
      • USM 21:10
        15h 20m
        1 stop
        CMB 11:00
        Koh Samui - Colombo | Thu, Jan 22 | SriLankan Airlines
        PHP 18,231
        13% OFF
        PHP 21,031 PHP 18,231
      • USM 07:55
        10h 55m
        1 stop
        CMB 17:20
        Koh Samui - Colombo | Wed, Jan 28 | SriLankan Airlines
        PHP 18,374
        13% OFF
        PHP 21,031 PHP 18,374
      • USM 06:45
        20h 30m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Sat, Feb 7 | Bangkok Airways
        PHP 18,382
        13% OFF
        PHP 21,031 PHP 18,382
      • USM 07:55
        9h 20m
        1 stop
        CMB 15:45
        Koh Samui - Colombo | Thu, Jan 29 | SriLankan Airlines
        PHP 18,399
        13% OFF
        PHP 21,031 PHP 18,399
      • USM 06:45
        20h 30m
        1 stop
        CMB 01:45
        Koh Samui - Colombo | Tue, Jan 6 | Bangkok Airways
        PHP 18,525
        12% OFF
        PHP 21,031 PHP 18,525
      • USM 17:40
        12h
        1 stop
        CMB 04:10
        Koh Samui - Colombo | Mon, Dec 22 | SriLankan Airlines
        PHP 18,567
        12% OFF
        PHP 21,031 PHP 18,567
      • USM 07:55
        9h 30m
        1 stop
        CMB 15:55
        Koh Samui - Colombo | Sat, Jan 31 | SriLankan Airlines
        PHP 18,717
        11% OFF
        PHP 21,031 PHP 18,717
      • USM 13:00
        17h 25m
        1 stop
        CMB Invalid Date
        Koh Samui - Colombo | Fri, Dec 12 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Koh Samui to Colombo are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Koh Samui to Colombo

The distance between Koh Samui and Colombo is 2,242.83 km. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight pricePHP 16,302
Cheapest round-trip ticket pricePHP 30,977
Off-season for travelOctober
Peak season for travelJuly
Flight distance2,242.83 km

Find the best time to fly from Koh Samui to Colombo

The cheapest time for Koh Samui to Colombo flights: Jan 4 to Jan 11 — one way flight prices from PHP 12,830.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Koh Samui to Colombo, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Koh Samui to Colombo (USM-CMB)?

    Based on Trip.com data, Bangkok Airways offers one-way fares as low as PHP 16,302 on Cheapest nonstop routes (e.g. USM to CMB on Wed, Jan 28), while Bangkok Airways offers Cheapest nonstop round-trips from PHP 30,977 departing on Thu, Jan 22 and returning on Sun, Jan 25.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Koh Samui to Colombo is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Koh Samui to Colombo, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Jan 28, with one-way flights priced at just PHP 16,302.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Bangkok Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Colombo travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Koh Samui to Colombo is October, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Koh Samui to Colombo on December 19, 2025 with Bangkok Airways, with prices starting at PHP 32,134.
  • The time difference between Colombo and Koh Samui is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.