Title: £412 Cheap Flights from London to Samui Intl. Airport (LON 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://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_flights_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £412 Cheap Flights from London (LON) to Samui Intl. Airport (USM) [View £412 flight on Mon, 16 Mar 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:LHR,to:USM,departure:16/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:411.92&airProductToken=AQqcAQoxCMWyARICNjQY64kBIIA9KOPjhwMwh-eHAzhFQABYAWoGWUJBU0lDcghFTE4yMEgySwoyCMWyARIDNDEyGIA9IMeaASjY6ocDMM_thwM4RUABWAFqBllCQVNJQ3IIRUxOMjBIMksKMwjFsgESBDc3NjQYx5oBINRkKMfuhwMw_u6HAzhFQAFYAWoGWUJBU0lDcghFTE4yMEgySxIKCAEQARgBKgJFWRgBIgQIARABKAIoAygEMAE) - [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 London to Samui Intl. Airport (USM) - ![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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EY"}}]) - ![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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&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:lon,to:usm,departure:09/10/2025TANYT&leg2=from:usm,to:lon,departure:16/10/2025TANYT&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 (LON) to Samui Intl. Airport (USM) Prices were available within the past 7 days and start at £412 for one-way flights and £618 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Tue, 3 Mar - Wed, 20 May LHR London USM Koh Samui £618 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:03/03/2026TANYT&leg2=from:USM,to:LHR,departure:20/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:617.92&airProductToken=AQqcAQozCM-mARIDMzM4GOuJASCVIiiN1IYDMJTVhgM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE3GJUiIMFSKMHVhgMwntqGAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESBDg2NTcYwVIg1GQojNuGAzDr24YDOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqcAQozCM-mARIEODY3NBjUZCDBUiiuvo0DMPm-jQM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjAIz6YBEgE4GMFSIJUiKKjAjQMwt8WNAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjPpgESAzMzMRiVIiDriQEogsaNAzCYx40DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQhIKCAIQARgCKgJPUxgBIgQIARABKAIoAygEMAs) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Fri, 28 Nov - Thu, 4 Dec LHR London USM Koh Samui £633 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:28/11/2025TANYT&leg2=from:USM,to:LHR,departure:04/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:632.82&airProductToken=AQqhAQozCMywARIDMzE3GOuJASC5PCi8ov4CMK-j_gI4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjQIzLABEgQ4MDUwGLk8IMeaASjApP4CMO2p_gI4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCjQIzLABEgQ0MTY0GMeaASDUZCjlqv4CMJyr_gI4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCqEBCjQIzLABEgQ0MTU4GNRkIMeaASjs4v4CMKjj_gI4TEAAWAFqCEVDT1NBVkVScgdMTkNEWEdCCjQIzLABEgQ4MDUxGMeaASC5PCjN5P4CMMXq_gI4TEABWAFqCEVDT1NBVkVScgdMTkNEWEdCCjMIzLABEgMzNDAYuTwg64kBKIvr_gIw9Ov-AjhMQAFYAWoIRUNPU0FWRVJyB0xOQ0RYR0ISCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Tue, 19 May - Tue, 2 Jun LCY London USM Koh Samui £649 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LCY,to:USM,departure:19/05/2026TANYT&leg2=from:USM,to:LCY,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:648.21&airProductToken=AQqeAQozCMywARIDNDYxGMvAASC5PCiZsY0DMPixjQM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzLABEgMxODAYuTwgwVIo27SNAzDluY0DOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgozCMywARIENDE3MBjBUiDUZCjYuo0DMJm7jQM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCp4BCjMIzLABEgQ0MTgzGNRkIMFSKJnMjgMw5MyOAzhLQABYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMgjMsAESAzE4MRjBUiC5PCi-zY4DMP_SjgM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCjMIzLABEgM0NTYYuTwgy8ABKM7ajgMwstuOAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0ISCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Thu, 7 May - Mon, 11 May LHR London USM Koh Samui £649 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:07/05/2026TANYT&leg2=from:USM,to:LHR,departure:11/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:648.22&airProductToken=AQqfAQo0CMyQARIEMjQ3ORjriQEgjBUokq6MAzCKr4wDOEtAAFgBaghFQ09TQVZFUnIHS05DRFhHQgoyCMyQARIDNzcyGIwVIMFSKOSvjAMw7rSMAzhLQAFYAWoIRUNPU0FWRVJyB0tOQ0RYR0IKMwjMkAESBDQ2MjYYwVIg1GQo3LWMAzCdtowDOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgqeAQozCMyQARIENDYzNhjUZCCSaijV14wDMMjYjAM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzJABEgM3ODEYkmogpQQozNqMAzDT4IwDOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgozCMyQARIDOTAwGKUEIOuJASio4YwDMIzijAM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCEgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Mon, 16 Mar - Mon, 30 Mar LGW London USM Koh Samui £662 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LGW,to:USM,departure:16/03/2026TANYT&leg2=from:USM,to:LGW,departure:30/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:661.48&airProductToken=AQqeAQozCMywARIDNDMzGMuxASC5PCiA5ocDMOnmhwM4S0AAWAFqCEVDT1NBVkVScgdLTkNEWEdCCjIIzLABEgMxNzYYuTwgkmootOeHAzCY7YcDOEtAAVgBaghFQ09TQVZFUnIHS05DRFhHQgozCMywARIENDE3MRiSaiDUZCia7ocDMI3vhwM4S0ABWAFqCEVDT1NBVkVScgdLTkNEWEdCCqEBCjQIzLABEgQ0MTg0GNRkIMeaASic-4gDMNj7iAM4VEAAWAFqCEVDT1NBVkVScgdUTkNEWEdCCjQIzLABEgQ4MDUxGMeaASC5PCjz_IgDMNeCiQM4VEABWAFqCEVDT1NBVkVScgdUTkNEWEdCCjMIzLABEgM0MzIYuTwgy7EBKI6NiQMw8o2JAzhUQAFYAWoIRUNPU0FWRVJyB1ROQ0RYR0ISCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Air France](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AF.gif) Sat, 21 Mar - Mon, 15 Jun LHR London USM Koh Samui £675 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:21/03/2026TANYT&leg2=from:USM,to:LHR,departure:15/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:674.62&airProductToken=AQqZAQoyCMGMARIEMTY4MRjriQEg4jAo3JmIAzCxmogDOExAAFgBagVMSUdIVHIIUlJMREk1TEEKMAjBjAESAzE5NhjiMCDBUijWm4gDMP6giAM4UkABWAFqBUxJR0hUcghSUkxESTVMQQoxCMGMARIEODAzMRjBUiDUZCjYoYgDMLeiiAM4UkABWAFqBUxJR0hUcghSUkxESTVMQQqZAQoxCMGMARIENDM5MBjUZCDBUijp3Y8DMLTejwM4UkAAWAFqBUxJR0hUcghSUkxESTVMQQowCMGMARIDMTk5GMFSIOIwKJPfjwMwhuWPAzhSQAFYAWoFTElHSFRyCFJSTERJNUxBCjIIwYwBEgQxMzgwGOIwIOuJASj05Y8DMMnmjwM4TEABWAFqBUxJR0hUcghSUkxESTVMQRIKCAIQARgCKgJBRhgBIgQIARABKAIoAygEMA0) ![Etihad Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EY.GIF) Thu, 5 Mar - Wed, 18 Mar LHR London USM Koh Samui £682 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:USM,departure:05/03/2026TANYT&leg2=from:USM,to:LHR,departure:18/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:681.26&airProductToken=AQpkCh8IxbIBEgI2NBjriQEggD0og-iGAzCn64YDOEVAAFgBCh8IxbIBEgM0MDQYgD0gwVIo_OuGAzD97oYDOEVAAVgBCiAIxbIBEgQ3NzkzGMFSINRkKKLwhgMw6PCGAzhFQAFYAQpkCiAIxbIBEgQ3NzUyGNRkIMFSKLL6hwMwkfuHAzhFQABYAQofCMWyARIDNDAxGMFSIIA9KIv9hwMwpYCIAzhFQAFYAQofCMWyARICNjMYgD0g64kBKPqAiAMw1YSIAzhFQAFYARIKCAEQARgBKgJFWRgBIgQIARABKAQwAQ) ![Gulf Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/gf.gif) Wed, 11 Mar - Thu, 19 Mar LGW London USM Koh Samui £733 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LGW,to:USM,departure:11/03/2026TANYT&leg2=from:USM,to:LGW,departure:19/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:732.63&airProductToken=AQqcAQoxCMeMARIBOBjLsQEggTgo-6mHAzD8rIcDOFdAAFgBagdFQ09MSVRFcghXRUxJVDFHQgoyCMeMARIDMTUyGIE4IMFSKKGuhwMwrLGHAzhXQAFYAWoHRUNPTElURXIIV0VMSVQxR0IKMwjHjAESBDQ0ODYYwVIg1GQo4rOHAzCotIcDOFdAAVgBagdFQ09MSVRFcghXRUxJVDFHQgqcAQozCMeMARIENDQ4ORjUZCDBUii6g4gDMIWEiAM4V0AAWAFqB0VDT0xJVEVyCFdFTElUMUdCCjIIx4wBEgMxNTMYwVIggTgo34SIAzCciIgDOFdAAVgBagdFQ09MSVRFcghXRUxJVDFHQgoxCMeMARIBORiBOCDLsQEoy4mIAzCcjYgDOFdAAVgBagdFQ09MSVRFcghXRUxJVDFHQhIKCAgQAhgCKgJHRhgBIgQIARABKAcoBCgGMAE) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Tue, 20 Jan - Wed, 4 Feb LCY London USM Koh Samui £740 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LCY,to:USM,departure:20/01/2026TANYT&leg2=from:USM,to:LCY,departure:04/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:739.11&airProductToken=AQqaAQoyCMuYARIDOTk2GMvAASCAkwEo9fuCAzC2_IIDOExAAFgBagVMSUdIVHIIR1JMME1ITEkKMQjLmAESAzgzNRiAkwEgkmoo_IaDAzDvjIMDOEdAAVgBagVMSUdIVHIIR1JMME1ITEkKMQjLmAESBDM3MjMYkmog1GQo2o6DAzDNj4MDOEdAAVgBagVMSUdIVHIIR1JMME1ITEkKmgEKMQjLmAESBDM3MTgY1GQgkmoooZ6EAzCUn4QDOEdAAFgBagVMSUdIVHIIR1JMME1ITEkKMQjLmAESAzgzNhiSaiCAkwEoxKOEAzCCqoQDOEdAAVgBagVMSUdIVHIIR1JMME1ITEkKMgjLmAESAzk4MxiAkwEgy8ABKL6qhAMw-qqEAzhMQAFYAWoFTElHSFRyCEdSTDBNSExJEgoIARABGAEqAktMGAEiBAgBEAEoAigDKAQwAQ) ![Singapore Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SQ.gif) Mon, 18 May - Mon, 25 May LGW London USM Koh Samui £749 Return found 4 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LGW,to:USM,departure:18/05/2026TANYT&leg2=from:USM,to:LGW,departure:25/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:748.08&airProductToken=AQpyCjcI06IBEgMzMDkYy7EBIJJqKKumjQMwvKyNAzhLQABYAWoMRWNvbm9teSBMaXRlcgdLMjVHQlJMCjcI06IBEgQ4MzYwGJJqINRkKICxjQMw6bGNAzhLQAFYAWoMRWNvbm9teSBMaXRlcgdLMjVHQlJMCnIKNwjTogESBDgzNDEY1GQgkmooyfGNAzDB8o0DOEtAAFgBagxFY29ub215IExpdGVyB0syNUdCUkwKNwjTogESAzMxMhiSaiDLsQEom_iNAzDF_o0DOEtAAVgBagxFY29ub215IExpdGVyB0syNUdCUkwSCggBEAEYASoCU1EYASIECAEQASgCKAMoBDAP) ## 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:09/10/2025TANYT&leg2=from:USM,to:LHR,departure:25/10/2025TANYT&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 £889](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:USM,departure:09/10/2025TANYT&leg2=from:USM,to:LHR,departure:25/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## 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 | £618 | | 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 LON-All Airports 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 LON-All Airports (LON) 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 LON-All Airports to Samui Intl. Airport start at just £618 and range up to £749.   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 March, 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 LON-All Airports 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.   \*Available to Expedia members.