Title: $459 Cheap flights from Colombo to Samui Intl. Airport (CMB to USM) - Expedia.com ![](https://images.trvl-media.com/place/6035013/26cceeb4-7a5f-4132-838c-9d0a557db5d2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6035013/26cceeb4-7a5f-4132-838c-9d0a557db5d2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $459 Cheap Flights from Colombo (CMB) to Samui Intl. Airport (USM) [View $459 flight on Mon, Nov 2, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:CMB,to:USM,departure:11/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:458.80&airProductToken=AQqYAQowCNOiARIDNDY5GIILIJJqKOOBnAMw04OcAzhOQABYAWoFRkY0MVNyCE4xNkxLT1BPCjEI06IBEgM3MjYYkmogx5oBKJSEnAMwh4WcAzhOQAFYAWoFRkY0MVNyCE4xNkxLT1BPCjEI0I4BEgMyNTAYx5oBINRkKOOGnAMwmoecAzhIQAFYAWoFRkY0MVNyCE4xNkxLT1BPEgoIAhABGAEqAlNRGAEiBAgBEAEoAigDKAQwDw) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travelers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Bandaranaike Intl. Airport (CMB) to Samui Intl. Airport (USM) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_CX.svg) Cathay Pacific [](https://www.expedia.com/Flights-Search?leg1=from:CMB,to:USM,departure:3/17/2026TANYT&leg2=from:USM,to:CMB,departure:3/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"CX"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_SQ.svg) Singapore Airlines [](https://www.expedia.com/Flights-Search?leg1=from:CMB,to:USM,departure:3/17/2026TANYT&leg2=from:USM,to:CMB,departure:3/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"SQ"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EK.svg) Emirates [](https://www.expedia.com/Flights-Search?leg1=from:CMB,to:USM,departure:3/17/2026TANYT&leg2=from:USM,to:CMB,departure:3/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EK"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_MH.svg) Malaysia Airlines [](https://www.expedia.com/Flights-Search?leg1=from:CMB,to:USM,departure:3/17/2026TANYT&leg2=from:USM,to:CMB,departure:3/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"MH"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_TG.svg) Thai Airways International [](https://www.expedia.com/Flights-Search?leg1=from:CMB,to:USM,departure:3/17/2026TANYT&leg2=from:USM,to:CMB,departure:3/24/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TG"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Colombo to Samui Intl. Airport (CMB-USM) Prices were available within the past 7 days and start at $459 for one-way flights and $877 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $877 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:876.30&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTkzGMFSINRkKJ3qiAMw_OqIAzhNQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTIyGNRkIMFSKIeHiQMw0oeJAzhNQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwNRjBUiCCCyifiYkDMOeKiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $887 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:887.00&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTkzGMFSINRkKJ3qiAMw_OqIAzhNQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTQ2GNRkIMFSKPmJiQMwxIqJAzhNQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNkYkDMJWTiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $901 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:900.50&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTA3GMFSINRkKMrviAMwi_CIAzhZQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTg4GNRkIMFSKP2LiQMw14yJAzhLQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNkYkDMJWTiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Sat, Apr 4 CMB Colombo USM Koh Samui $907 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:4/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:907.00&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTkxGMFSINRkKP_piAMwxeqIAzhLQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTY2GNRkIMFSKPG3iQMwvLiJAzhZQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNvokDMJXAiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Thu, Mar 12 - Fri, Mar 13 CMB Colombo USM Koh Samui $908 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/12/2026TANYT&leg2=from:USM,to:CMB,departure:3/13/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:908.00&airProductToken=AQpXCikI1ZgBEgM0MDQYggsgwVIomLGHAzDvsocDOFNAAFgBcghTM01QR0xLNgoqCNCOARIEMTE3NRjBUiDUZCiqtYcDMIm2hwM4VEABWAFyCFMzTVBHTEs2ClcKKgjQjgESBDExNzYY1GQgwVIox8GHAzCmwocDOFlAAFgBcghWM01QR0xLNgopCNWYARIDNDA1GMFSIIILKP_JhwMw0cuHAzhWQAFYAXIIVjNNUEdMSzYSCggBEAEYASoCVUwYASIECAEQASgCKAMoBDAB) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $911 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:910.50&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTA3GMFSINRkKMrviAMwi_CIAzhZQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTkwGNRkIMFSKIeMiQMw4YyJAzhNQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNkYkDMJWTiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $912 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:911.20&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTA3GMFSINRkKMrviAMwi_CIAzhZQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTcyGNRkIMFSKPuKiQMwxouJAzhLQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNkYkDMJWTiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![SriLankan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UL.gif) Sat, Mar 28 - Sat, Apr 4 CMB Colombo USM Koh Samui $917 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:4/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:917.00&airProductToken=AQpWCikI1ZgBEgM0MDQYggsgwVIomOWIAzDv5ogDOFNAAFgBcghTM01QR0xLNgopCNCOARIDMTkzGMFSINRkKJ3qiAMw_OqIAzhNQAFYAXIIUzNNUEdMSzYKVgopCNCOARIDMTY4GNRkIMFSKIq4iQMw1biJAzhZQABYAXIIUzNNUEdMSzYKKQjVmAESAzQwMxjBUiCCCyjNvokDMJXAiQM4U0ABWAFyCFMzTVBHTEs2EgoIARABGAEqAlVMGAEiBAgBEAEoAigDKAQwAQ) ![Singapore Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SQ.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $1,033 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1032.30&airProductToken=AQpxCjAI06IBEgM0NjkYggsgkmoog-KIAzDz44gDOFdAAFgBagVGRjMxU3IIVzIzTEtSUE8KPQjTogESBDg1ODYYkmog1GQo-OiIAzDm6YgDOFdAAVgBagVGRjMxU3IIVzIzTEtSUE96CgjUpAESBDg1ODYKZAowCNCOARIDOTY1GNRkIJJqKNCGiQMww4eJAzhRQABYAWoFRkYzMVNyCEgxNExLUlBPCjAI06IBEgM0NjgYkmogggso3IyJAzC9jokDOEhAAVgBagVGRjMxU3IISDE0TEtSUE8SCggCEAEYASoCU1EYASIECAEQASgCKAMoBDAP) ![Cathay Pacific](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/CX.gif) Sat, Mar 28 - Tue, Mar 31 CMB Colombo USM Koh Samui $1,051 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:CMB,to:USM,departure:3/28/2026TANYT&leg2=from:USM,to:CMB,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1050.30&airProductToken=AQp4CjQIw7ABEgM2MTAYggsgxzIog-KIAzDI5IgDOE1AAFgBaglFQ09OTElHSFRyCE1SMjFMS0FPCkAIw7ABEgQ2NTAzGMcyINRkKMHoiAMwk-qIAzhNQAFYAWoJRUNPTkxJR0hUcghNUjIxTEtBT3oJCNCOARIDODA2EgoIARABGAEqAkNYGAEiBAgBEAEoAigEKAYwAQ) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Vacation Sale Members save up to 40% on hotels and homes. Plan this year’s big trip and save. [Book now](https://expedia.com/deals?rfrr=FTG_SPRING_PROMO_) ## Frequently asked questions ### How much does a flight from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) cost? ### What is the cheapest month to fly from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)? ### What is the cheapest airline that flies from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)? ### How many flights per day from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)? ### What day of the week has the most flights from CMB to USM? ### What is the best time to fly from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)? ### Is it cheaper to buy a plane ticket from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM) last-minute? ### Is it cheaper to book a CMB to USM flight and hotel package? ### Can I cancel or change the date of my flight from Bandaranaike Intl. Airport (CMB) to Ko Samui Airport (USM)? ## Travel information | Origin airport | Bandaranaike Intl. | | ------------------- | ------------------- | | Destination airport | Samui Intl. Airport | | Roundtrip price | $876 | | 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 March. 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 2026\. You can also book with separate airlines for your outbound and return journeys, from $459 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](https://www.expedia.com/package-deals). 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. \*Flight schedules are subject to change. \*Available to One Key members.