Title: £409 Flights from London Heathrow to Ko Samui (LHR to USM) - Expedia.co.uk ![](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) # £409 Cheap Flights from London (LHR) to Samui Intl. Airport (USM) [View £409 flight on Thu, 12 Mar 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:LHR,to:USM,departure:12/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:408.52&airProductToken=AQqbAQoxCMWyARICNjgY64kBIIA9KIe6hwMwob2HAzhFQABYAWoGWUJBU0lDcghFTE4yMEgySwoyCMWyARIDNDEyGIA9IMeaASjYvYcDMM_AhwM4RUABWAFqBllCQVNJQ3IIRUxOMjBIMksKMgjQjgESAzI1OBjHmgEg1GQox8GHAzD-wYcDOExAAVgBagZZQkFTSUNyCEVMTjIwSDJLEgoIARABGAEqAkVZGAEiBAgBEAEoAigDKAQwAQ) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers 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 Heathrow Airport (LHR) to Samui Intl. Airport (USM) - ![Etihad Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EY.svg) Etihad Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EY"}}]) - ![Singapore Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_SQ.svg) Singapore Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"SQ"}}]) - ![Thai Airways International](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_TG.svg) Thai Airways International [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TG"}}]) - ![Qatar Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QR.svg) Qatar Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![British Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![EVA Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BR.svg) EVA Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BR"}}]) - ![KLM](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_KL.svg) KLM [](https://www.expedia.co.uk/Flights-Search?leg1=from:lhr,to:usm,departure:11/11/2025TANYT&leg2=from:usm,to:lhr,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"KL"}}]) ![notification illustration](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\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Cheap Flights from London (LHR) to Samui Intl. Airport (USM) Prices were available within the past 7 days and start at £409 for one-way flights and £630 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Fri, 15 May - Tue, 2 Jun LHR London USM Koh Samui £630 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:15/05/2026TANYT&leg2=from:USM,to:LHR,departure:02/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:629.52&airProductToken=AQqeAQozCMywARIDMzE5GOuJASC5PCi-hY0DMKKGjQM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzLABEgMxODAYuTwgwVIo24eNAzDljI0DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgozCMywARIENDE3MBjBUiDUZCjYjY0DMJmOjQM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCp4BCjMIzLABEgQ0MTc5GNRkIMFSKOfLjgMwssyOAzhLQABYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMgjMsAESAzE4MRjBUiC5PCi-zY4DMP_SjgM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCjMIzLABEgMzNDAYuTwg64kBKM_TjgMwvdSOAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0ISCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Thu, 14 May - Tue, 26 May LHR London USM Koh Samui £630 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:14/05/2026TANYT&leg2=from:USM,to:LHR,departure:26/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:629.72&airProductToken=AQqcAQozCM-mARIDMzM4GOuJASCVIijW_YwDMNj-jAM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE3GJUiIMFSKI__jAMw9oONAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESBDg2NjMYwVIg1GQo5ISNAzClhY0DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqcAQozCM-mARIEODY3NBjUZCDBUijugY4DMLmCjgM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE4GMFSIJUiKOiDjgMw94iOAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESAzMzMRiVIiDriQEowomOAzDYio4DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJPUxgBIgQIARABKAIoAygEMAs) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Thu, 14 May - Tue, 26 May LHR London USM Koh Samui £633 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:14/05/2026TANYT&leg2=from:USM,to:LHR,departure:26/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:632.12&airProductToken=AQqfAQo0CMyQARIEMjQ3ORjriQEgjBUo8vyMAzDq_YwDOEtAAFgBaghFQ09TQVZFUnIHS05DRFhHQgoyCMyQARIDNzcyGIwVIMFSKMT-jAMwzoONAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjMkAESBDQ2MjYYwVIg1GQovISNAzD9hI0DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqfAQozCMyQARIENDYzNhjUZCCSaii1gI4DMKiBjgM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzJABEgM3NjkYkmogjBUonYOOAzCQiY4DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgo0CMyQARIEMjQ3MBiMFSDriQEo1omOAzDTio4DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, 17 Jun - Sun, 21 Jun LHR London USM Koh Samui £641 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:17/06/2026TANYT&leg2=from:USM,to:LHR,departure:21/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:640.72&airProductToken=AQqfAQo0CMyQARIEMjQ3NxjriQEgjBUo3fqPAzDQ-48DOEtAAFgBaghFQ09TQVZFUnIHS05DRFhHQgoyCMyQARIDNzY4GIwVIJJqKIT9jwMw6IKQAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjMkAESBDQ2MzAYkmog1GQov4SQAzCyhZADOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqfAQozCMyQARIENDYzNhjUZCCSaij1pJADMOilkAM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzJABEgM3NjkYkmogjBUo3aeQAzDQrZADOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgo0CMyQARIEMjQ3MBiMFSDriQEolq6QAzCTr5ADOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Thu, 7 May - Tue, 19 May LHR London USM Koh Samui £643 Return found 16 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:07/05/2026TANYT&leg2=from:USM,to:LHR,departure:19/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:642.52&airProductToken=AQqcAQozCM-mARIDMzM4GOuJASCVIij2rowDMPivjAM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE3GJUiIMFSKK-wjAMwlrWMAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESBDg2NjMYwVIg1GQohLaMAzDFtowDOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqcAQozCM-mARIEODY1OBjUZCDBUij_so0DMMqzjQM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE4GMFSIJUiKIi1jQMwl7qNAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESAzMzNRiVIiDriQEoxb2NAzDgvo0DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJPUxgBIgQIARABKAIoAygEMAs) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Sat, 16 May - Tue, 26 May LHR London USM Koh Samui £645 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:16/05/2026TANYT&leg2=from:USM,to:LHR,departure:26/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:644.22&airProductToken=AQqcAQozCM-mARIDMzM4GOuJASCVIiiWlI0DMJiVjQM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE3GJUiIMFSKM-VjQMwtpqNAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESBDg2NjMYwVIg1GQopJuNAzDlm40DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqcAQozCM-mARIEODY1OBjUZCDBUijfgY4DMKqCjgM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE4GMFSIJUiKOiDjgMw94iOAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESAzMzMRiVIiDriQEowomOAzDYio4DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJPUxgBIgQIARABKAIoAygEMAs) ![Etihad Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EY.GIF) Mon, 16 Mar - Thu, 26 Mar LHR London USM Koh Samui £680 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:16/03/2026TANYT&leg2=from:USM,to:LHR,departure:26/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:679.10&airProductToken=AQqcAQoxCMWyARICNjYY64kBIIA9KKjmhwMwwumHAzhFQABYAWoGWUJBU0lDcghFTE4yOEgySwoyCMWyARIDNDEyGIA9IMeaASjY6ocDMM_thwM4RUABWAFqBllCQVNJQ3IIRUxOMjhIMksKMwjFsgESBDc3NjQYx5oBINRkKMfuhwMw_u6HAzhFQAFYAWoGWUJBU0lDcghFTE4yOEgySwqcAQozCMWyARIENzcyMBjUZCDHmgEoqtCIAzDm0IgDOEVAAFgBagZZQkFTSUNyCEVMTjI4SDJLCjIIxbIBEgM0MTcYx5oBIIA9KN7RiAMwh9WIAzhFQAFYAWoGWUJBU0lDcghFTE4yOEgySwoxCMWyARICNjEYgD0g64kBKLXYiAMwkNyIAzhFQAFYAWoGWUJBU0lDcghFTE4yOEgySxIKCAEQARgBKgJFWRgBIgQIARABKAIoAygEMAE) ![Air France](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AF.gif) Fri, 22 May - Wed, 10 Jun LHR London USM Koh Samui £729 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:22/05/2026TANYT&leg2=from:USM,to:LHR,departure:10/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:728.62&airProductToken=AQqZAQoyCMGMARIEMTI4MRjriQEg4jAo49aNAzCz140DOExAAFgBagVMSUdIVHIIR1JMNVBITEkKMAjBjAESAzI1NhjiMCCSaiiD2I0DMJ7ejQM4R0ABWAFqBUxJR0hUcghHUkw1UEhMSQoxCMGMARIENDM4NhiSaiDUZCj_340DMPLgjQM4R0ABWAFqBUxJR0hUcghHUkw1UEhMSQqZAQoxCMGMARIENDM4MBjUZCCSaiiVqY8DMIiqjwM4R0AAWAFqBUxJR0hUcghHUkw1UEhMSQowCMGMARIDMjU3GJJqIOIwKMarjwMw-rGPAzhHQAFYAWoFTElHSFRyCEdSTDVQSExJCjIIwYwBEgQxNjgwGOIwIOuJASjPso8DMKSzjwM4TEABWAFqBUxJR0hUcghHUkw1UEhMSRIKCAEQARgBKgJBRhgBIgQIARABKAIoAygEMA0) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Fri, 5 Jun - Fri, 19 Jun LHR London USM Koh Samui £750 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:05/06/2026TANYT&leg2=from:USM,to:LHR,departure:19/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:749.92&airProductToken=AQqbAQozCMuYARIEMTAwNhjriQEggJMBKMXxjgMwkPKOAzhMQABYAWoFTElHSFRyCEdSTDVQSExJCjEIy5gBEgM4NDMYgJMBIMFSKNPzjgMw9viOAzhHQAFYAWoFTElHSFRyCEdSTDVQSExJCjEIy5gBEgQzNzQ5GMFSINRkKPj5jgMwufqOAzhHQAFYAWoFTElHSFRyCEdSTDVQSExJCpsBCjEIy5gBEgQzNzU1GNRkIMFSKOmKkAMwtIuQAzhOQABYAWoFTElHSFRyCE5STDBLQkxBCjEIy5gBEgM4NDQYwVIggJMBKLGMkAMwhpKQAzhOQAFYAWoFTElHSFRyCE5STDBLQkxBCjMIy5gBEgQxMDE3GICTASDriQEo25KQAzCrk5ADOExAAVgBagVMSUdIVHIITlJMMEtCTEESCggBEAEYASoCS0wYASIECAEQASgCKAMoBDAN) ![Singapore Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SQ.gif) Thu, 13 Nov - Tue, 18 Nov LHR London USM Koh Samui £764 Return found 23 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:13/11/2025TANYT&leg2=from:USM,to:LHR,departure:18/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:763.72&airProductToken=AQpyCjcI06IBEgMzMTcY64kBIJJqKMD6_AIw1oD9AjhLQABYAWoMRWNvbm9teSBMaXRlcgdLMjVHQlJMCjcI06IBEgQ4NTg2GJJqINRkKLiF_QIwpob9AjhLQAFYAWoMRWNvbm9teSBMaXRlcgdLMjVHQlJMCnIKNwjTogESBDg1ODcY1GQgkmoo3bP9AjDftP0COEtAAFgBagxFY29ub215IExpdGVyB0syNUdCUkwKNwjTogESAzMxOBiSaiDriQEonbv9AjD-wf0COEtAAVgBagxFY29ub215IExpdGVyB0syNUdCUkwSCggBEAEYASoCU1EYASIECAEQASgCKAMoBDAP) ## Alternative airports near Koh Samui Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:USM,departure:11/11/2025TANYT&leg2=from:USM,to:LHR,departure:25/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) USM Samui Intl. Airport CheapestClosest 31 min [Flights from £792](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:USM,departure:11/11/2025TANYT&leg2=from:USM,to:LHR,departure:25/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Frequently asked questions ### How much is a flight from Heathrow Airport to USM? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip flight between London Heathrow and Samui Airport was £630. Cheap tickets don't hang around, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from LHR to Ko Samui Airport? > This differs from airline to airline, as each has its own set of terms and conditions. Head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where there are easy instructions on how to cancel online. ### How do I find cheap flights from Heathrow Airport (LHR) to Ko Samui Airport (USM) that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for London Heathrow to Ko Samui Airport (USM) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from London Heathrow to Ko Samui Airport (USM)? > The distance is around 9,900 kilometres, so fill your carry-on luggage with all you need to make the long journey comfortable. Wondering what to take on board your Hounslow to Koh Samui flight? Earplugs, a sleep mask and a neck pillow are a few essentials. ### Which airlines fly direct from Heathrow Airport (LHR) to Ko Samui Airport? > There are no direct flights, so you'll have to make at least one stop between Heathrow Airport and Samui Airport. Make the most of the layover time to stretch your legs and grab a coffee. ### Are LHR to Ko Samui Airport (USM) flight tickets cheaper when they're purchased at the last minute? > Booking your trip from LHR to Ko Samui Airport (USM) at the last minute could be your ticket to an awesome deal. However, it could end up costing a great deal more! If you'd rather avoid the risk, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia. ## Travel information | Origin airport | Heathrow | | --- | --- | | Destination airport | Samui Intl. Airport | | Airlines serving | Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Emirates, Etihad Airways, Finnair, Gulf Air, KLM, Lufthansa, Malaysia Airlines, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines | | Return price | £630 | | Distance | 9836 km | ## Book with confidence ### Compare flights from London to Samui Intl. Airport easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Samui Intl. Airport. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Samui Intl. Airport in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to Samui Intl. Airport.   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 Heathrow (LHR) to Samui Intl. Airport (USM) The easiest way to view the best deals on flights from London to Samui Intl. Airport 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 Heathrow to Samui Intl. Airport start at just £630 and range up to £764.   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near London and Samui Intl. Airport - booking your flight during May, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your London to Samui Intl. Airport flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Samui Intl. Airport 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.   ## Explore a world of travel with Expedia - Accommodation - Flights - Packages - Cars - Holiday Homes - Other - [4 Star Hotels in Koh Samui](https://www.expedia.co.uk/4Star-Koh-Samui-Hotels.s40-0-d6035013.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Koh Samui](https://www.expedia.co.uk/5Star-Koh-Samui-Hotels.s50-0-d6035013.Travel-Guide-Filter-Hotels) - [Hotels near Bangrak Pier](https://www.expedia.co.uk/Bangrak-Pier-Hotels.0-l6146122-0.Travel-Guide-Filter-Hotels) - [Hotels near Bo Phut Beach](https://www.expedia.co.uk/Bo-Phut-Beach-Hotels.0-l6050548-0.Travel-Guide-Filter-Hotels) - [Gay-Friendly Hotels in Bophut Hills](https://www.expedia.co.uk/Bophut-Hills-Koh-Samui-Hotels-Gay-Friendly-Hotel.0-n553248635976400168-0-tGayFriendlyHotel.Travel-Guide-Filter-Hotels) - [Bophut Hills Hotels](https://www.expedia.co.uk/Bophut-Hills-Koh-Samui-Hotels.0-n553248635976400168-0.Travel-Guide-Filter-Hotels) - 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