Title: £344 Cheap Flights from Samui Intl. Airport to London (USM to LHR) - Expedia.co.uk ![](https://images.trvl-media.com/place/178279/2a1d5619-553b-468a-a773-e81b88024741.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178279/2a1d5619-553b-468a-a773-e81b88024741.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £344 Cheap Flights from Samui Intl. Airport (USM) to London (LHR) [View £344 flight on Sat, 20 Dec 2025](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:USM,to:LHR,departure:20/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:343.90&airProductToken=AQqbAQoyCNCOARIDNDAzGNRkIMeaASiwm4ADMOybgAM4TEAAWAFqBllCQVNJQ3IIRU5OMjBINTkKMgjFsgESAzQxNRjHmgEggD0omp-AAzClooADOEVAAVgBagZZQkFTSUNyCEVOTjIwSDU5CjEIxbIBEgI2MxiAPSDriQEo-qKAAzDVpoADOEVAAVgBagZZQkFTSUNyCEVOTjIwSDU5EgoIARABGAEqAkVZGAEiBAgBEAEoAigDKAQwAQ) - [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 Samui Intl. Airport (USM) to Heathrow Airport (LHR) - ![Lufthansa](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.co.uk/Flights-Search?leg1=from:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![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:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EY"}}]) - ![Swiss International Air Lines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LX.svg) Swiss International Air Lines [](https://www.expedia.co.uk/Flights-Search?leg1=from:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ![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:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![Austrian Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_OS.svg) Austrian Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"OS"}}]) - ![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:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&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:usm,to:lhr,departure:12/11/2025TANYT&leg2=from:lhr,to:usm,departure:19/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BR"}}]) ![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 Samui Intl. Airport (USM) to London (LHR) Prices were available within the past 7 days and start at £344 for one-way flights and £681 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, 12 Nov - Mon, 17 Nov USM Koh Samui LHR London £681 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:12/11/2025TANYT&leg2=from:LHR,to:USM,departure:17/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:680.52&airProductToken=AQqiAQo0CMyQARIENDYzNhjUZCCSaijV7vwCMMjv_AI4S0AAWAFqCEVDT1NBVkVScghLWDBYRFlOQwozCMyQARIDNzY5GJJqIIwVKNHx_AIw3ff8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCjUIzJABEgQ0MTkyGIwVIOuJASit-PwCMKX5_AI4S0ABWAFqCEVDT1NBVkVScghLWDBYRFlOQwqiAQo1CMyQARIENDE5NxjriQEgjBUo7qr9AjDcq_0COExAAFgBaghFQ09TQVZFUnIITFgwWERZTkMKMwjMkAESAzc2OBiMFSCSaijArP0CMJWy_QI4TEABWAFqCEVDT1NBVkVScghMWDBYRFlOQwo0CMyQARIENDYzMBiSaiDUZCi6s_0CMK20_QI4TEABWAFqCEVDT1NBVkVScghMWDBYRFlOQxIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Tue, 11 Nov - Tue, 18 Nov USM Koh Samui LHR London £706 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:11/11/2025TANYT&leg2=from:LHR,to:USM,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:705.82&airProductToken=AQqhAQo0CMywARIENDE3ORjUZCDBUiib4PwCMP_g_AI4S0AAWAFqCEVDT1NBVkVScghLWDBYRFlOQwozCMywARIDMTgxGMFSILk8KPfh_AIw0ef8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCjQIzLABEgMzNDAYuTwg64kBKKvo_AIwlOn8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCqEBCjQIzLABEgMzMjcY64kBILk8KMC2_QIwrrf9AjhUQABYAWoIRUNPU0FWRVJyCFRYMFhEWU5DCjMIzLABEgMxNzYYuTwgkmoo9Lf9AjDYvf0COFRAAVgBaghFQ09TQVZFUnIIVFgwWERZTkMKNAjMsAESBDQxNzEYkmog1GQo2r79AjDNv_0COFRAAVgBaghFQ09TQVZFUnIIVFgwWERZTkMSCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Tue, 11 Nov - Tue, 18 Nov USM Koh Samui LHR London £713 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:11/11/2025TANYT&leg2=from:LHR,to:USM,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:712.72&airProductToken=AQqhAQo0CMywARIENDE3OBjUZCCSaii14_wCMKjk_AI4S0AAWAFqCEVDT1NBVkVScghLWDBYRFlOQwozCMywARIDMTc3GJJqILk8KMXm_AIw2-z8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCjQIzLABEgMzMTYYuTwg64kBKI3t_AIwhe78AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCqEBCjQIzLABEgMzMjcY64kBILk8KMC2_QIwrrf9AjhUQABYAWoIRUNPU0FWRVJyCFRYMFhEWU5DCjMIzLABEgMxNzYYuTwgkmoo9Lf9AjDYvf0COFRAAVgBaghFQ09TQVZFUnIIVFgwWERZTkMKNAjMsAESBDQxNzEYkmog1GQo2r79AjDNv_0COFRAAVgBaghFQ09TQVZFUnIIVFgwWERZTkMSCggCEAEYAioCTFgYASIECAEQASgCKAMoBDAL) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Mon, 16 Mar - Mon, 23 Mar USM Koh Samui LHR London £715 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:16/03/2026TANYT&leg2=from:LHR,to:USM,departure:23/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:714.22&airProductToken=AQqhAQo0CMyQARIENDYzNhjUZCCSaijV4YcDMMjihwM4VEAAWAFqCEVDT1NBVkVScghUWDBYRFlOQwozCMyQARIDNzgxGJJqIKUEKNvkhwMwgOuHAzhUQAFYAWoIRUNPU0FWRVJyCFRYMFhEWU5DCjQIzJABEgM5MDAYpQQg64kBKOnrhwMwzeyHAzhUQAFYAWoIRUNPU0FWRVJyCFRYMFhEWU5DCqIBCjUIzJABEgQ0MTk3GOuJASCMFSiutIgDMJy1iAM4S0AAWAFqCEVDT1NBVkVScghLWDBYRFlOQwozCMyQARIDNzcyGIwVIMFSKIC2iAMw9rqIAzhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DCjQIzJABEgQ0NjI4GMFSINRkKNq7iAMwoLyIAzhLQAFYAWoIRUNPU0FWRVJyCEtYMFhEWU5DEgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Tue, 4 Nov - Wed, 12 Nov USM Koh Samui LHR London £716 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:04/11/2025TANYT&leg2=from:LHR,to:USM,departure:12/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:715.42&airProductToken=AQplCiAIzLABEgQ0MTc5GNRkIMFSKLuR_AIwn5L8AjhLQABYAQofCMywARIDMTgxGMFSILk8KJeT_AIw8Zj8AjhLQAFYAQogCMywARIDMzQwGLk8IOuJASjLmfwCMLSa_AI4S0ABWAEKZQogCMyQARIDOTE1GOuJASClBCi68vwCMJnz_AI4S0AAWAEKHwjMkAESAzc4MBilBCCSaij48_wCMNf5_AI4S0ABWAEKIAjMkAESBDQ2MzAYkmog1GQomvv8AjCN_PwCOEtAAVgBEgoIARABGAEqAkxYGAEiBAgBEAEoBDAB) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Wed, 12 Nov - Mon, 17 Nov USM Koh Samui LHR London £717 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:12/11/2025TANYT&leg2=from:LHR,to:USM,departure:17/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:716.42&airProductToken=AQqhAQo0CMywARIENDE3ORjUZCDBUii76_wCMJ_s_AI4S0AAWAFqCEVDT1NBVkVScghLWDBYSVlOQwozCMywARIDMTgxGMFSILk8KJft_AIw8fL8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhJWU5DCjQIzLABEgMzNDAYuTwg64kBKMvz_AIwtPT8AjhLQAFYAWoIRUNPU0FWRVJyCEtYMFhJWU5DCqIBCjUIzJABEgQ0MTk3GOuJASCMFSjuqv0CMNyr_QI4TEAAWAFqCEVDT1NBVkVScghMWDBYSVlOQwozCMyQARIDNzY4GIwVIJJqKMCs_QIwlbL9AjhMQAFYAWoIRUNPU0FWRVJyCExYMFhJWU5DCjQIzJABEgQ0NjMwGJJqINRkKLqz_QIwrbT9AjhMQAFYAWoIRUNPU0FWRVJyCExYMFhJWU5DEgoIARABGAEqAkxYGAEiBAgBEAEoAigDKAQwAQ) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Tue, 20 Jan - Wed, 4 Feb USM Koh Samui LHR London £800 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:20/01/2026TANYT&leg2=from:LHR,to:USM,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:799.32&airProductToken=AQpjCiAIz6YBEgQ4Njc4GNRkIMFSKMzzggMwl_SCAzhLQABYAQodCM-mARIBNhjBUiCVIijk9YIDMJv7ggM4S0ABWAEKIAjPpgESAzMzORiVIiDriQEoyPuCAzDU_IIDOEtAAVgBCmMKIAjPpgESAzMzOBjriQEglSIoraSEAzC0pYQDOFdAAFgBCh0Iz6YBEgE3GJUiIMFSKOGlhAMwvqqEAzhXQAFYAQogCM-mARIEODY1NxjBUiDUZCisq4QDMIushAM4V0ABWAESCggBEAEYASoCT1MYASIECAEQASgEMAE) ![Gulf Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/gf.gif) Thu, 13 Nov - Wed, 19 Nov USM Koh Samui LHR London £823 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:13/11/2025TANYT&leg2=from:LHR,to:USM,departure:19/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:822.32&airProductToken=AQqcAQozCMeMARIENDQ4ORjUZCDBUij6-fwCMMX6_AI4V0AAWAFqB0VDT0xJVEVyCFdDTElUMVRICjIIx4wBEgMxNTMYwVIggTgon_v8AjDc_vwCOFdAAVgBagdFQ09MSVRFcghXQ0xJVDFUSAoxCMeMARIBNxiBOCDriQEos4D9AjDrg_0COFdAAVgBagdFQ09MSVRFcghXQ0xJVDFUSAqcAQoxCMeMARIBMhjriQEggTgour39AjDAwP0COFdAAFgBagdFQ09MSVRFcghXQ0xJVDFUSAoyCMeMARIDMTUyGIE4IMFSKKHC_QIwrMX9AjhXQAFYAWoHRUNPTElURXIIV0NMSVQxVEgKMwjHjAESBDQ0ODgYwVIg1GQoj8j9AjDVyP0COFdAAVgBagdFQ09MSVRFcghXQ0xJVDFUSBIKCAEQARgBKgJHRhgBIgQIARABKAIoBCgGMAE) ![Singapore Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SQ.gif) Mon, 17 Nov - Mon, 24 Nov USM Koh Samui LHR London £852 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:17/11/2025TANYT&leg2=from:LHR,to:USM,departure:24/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:851.72&airProductToken=AQp0CjgI06IBEgQ4NTg3GNRkIJJqKL2o_QIwv6n9AjhLQABYAWoMRWNvbm9teSBMaXRlcghLMzVUSFJQTwo4CNOiARIDMzE4GJJqIOuJASj9r_0CMN62_QI4S0ABWAFqDEVjb25vbXkgTGl0ZXIISzM1VEhSUE8KdAo4CNOiARIDMzE3GOuJASCSaiig9v0CMLb8_QI4S0AAWAFqDEVjb25vbXkgTGl0ZXIISzM1VEhSUE8KOAjTogESBDg1ODYYkmog1GQomIH-AjCGgv4COEtAAVgBagxFY29ub215IExpdGVyCEszNVRIUlBPEgoIAhABGAEqAlNRGAEiBAgBEAEoAigDKAQwDw) ![Qatar Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/QR.gif) Thu, 20 Nov - Thu, 4 Dec USM Koh Samui LHR London £854 Return found 10 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:USM,to:LHR,departure:20/11/2025TANYT&leg2=from:LHR,to:USM,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:853.62&airProductToken=AQqgAQo0CNGkARIENDQzNhjUZCCSaiihx_0CMJTI_QI4V0AAWAFqCEVDTEFTU0lDcghPSlNHUDRSRQozCNGkARIDOTQ3GJJqIMM7KP_J_QIw3839AjhPQAFYAWoIRUNMQVNTSUNyCE9KU0dQNFJFCjMI0aQBEgIxMRjDOyDriQEo-s79AjDB0v0COE9AAVgBaghFQ0xBU1NJQ3IIT0pTR1A0UkUKoQEKNAjRpAESAzExMBjriQEgwzsogun-AjCS7P4COE9AAFgBaghFQ0xBU1NJQ3IIT0pTR1A0UkUKMwjRpAESAzk0OBjDOyCSaijJ7P4CMJ_w_gI4T0ABWAFqCEVDTEFTU0lDcghPSlNHUDRSRQo0CNGkARIENDQxORiSaiDUZCiw8f4CMKPy_gI4V0ABWAFqCEVDTEFTU0lDcghPSlNHUDRSRRIKCAEQARgBKgJRUhgBIgQIARABKAIoBCgGMAE) ## Alternative airports near London Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.co.uk/Flights-Search?leg1=from:USM,to:LHR,departure:12/11/2025TANYT&leg2=from:LHR,to:USM,departure:17/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LHR Heathrow Cheapest 28 min [Flights from £681](https://www.expedia.co.uk/Flights-Search?leg1=from:USM,to:LHR,departure:12/11/2025TANYT&leg2=from:LHR,to:USM,departure:17/11/2025TANYT&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 USM to LHR? > Based on fares quoted within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from Ko Samui Airport to LHR start from £681. Make your booking ASAP to score the best price for your adventure. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Samui Airport to London Heathrow? > We understand that circumstances change unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just head to the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033) and follow the instructions. ### How do I find cheap flights from USM to Heathrow Airport (LHR) 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 USM to LHR flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from USM to LHR? > The distance is around 9,900 kilometres, so pack your carry-on luggage with everything you need to make the long journey comfortable. Not sure what to take on board your Koh Samui to Hounslow flight? A neck pillow, earplugs and a sleep mask are among the essentials. ### Which airlines fly direct from USM to London Heathrow? > Unfortunately, there aren't any airlines that directly fly between Ko Samui Airport and LHR. You'll need to book a flight with at least one stop. ### Are Ko Samui Airport to LHR flight tickets cheaper when they're purchased at the last minute? > Late planners can occasionally nab a bargain, with some super cheap airfares from USM to LHR appearing a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates the best flight deals regularly — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines quote prices so far in advance. ## Travel information | Origin airport | Samui Intl. Airport | | --- | --- | | Destination airport | Heathrow | | Airlines serving | Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Emirates, Etihad Airways, KLM, Lufthansa, Oman Air, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International | | Return price | £681 | | Distance | 9836 km | ## Book with confidence ### Compare flights from Samui Intl. Airport to London easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Samui Intl. Airport to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Samui Intl. Airport to Heathrow.   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 Samui Intl. Airport (USM) to Heathrow (LHR) The easiest way to view the best deals on flights from Samui Intl. Airport to London 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 Samui Intl. Airport to Heathrow start at just £681 and range up to £854.   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Samui Intl. Airport and London - booking your flight during November, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Samui Intl. Airport to London flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Samui Intl. Airport to Heathrow 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. 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