Title: £354 Flights from London Heathrow to St. Louis (LHR to STL) - Expedia.co.uk ![](https://images.trvl-media.com/place/178309/1d118261-eb93-42dd-aeef-5f82e1f037e8.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178309/1d118261-eb93-42dd-aeef-5f82e1f037e8.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £354 Cheap Flights from London (LHR) to St. Louis (STL) [View £354 flight on Wed, 11 Feb 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:LHR,to:STL,departure:11/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:353.25&airProductToken=AQq6AQpBCMyQARIENDE5MxjriQEgjBUoje6EAzD77oQDOEtAAFgBaghFQ09MSUdIVHIIS0pPSUtYQlF6CgjWmAESBDQxOTMKMwjMkAESAzQzNBiMFSCuHCjm8IQDMLn1hAM4S0ABWAFqCEVDT0xJR0hUcghLSk9JS1hCUQpACMyQARIENzgyNhiuHCDyXCjt9oQDMMr3hAM4S0ABWAFqCEVDT0xJR0hUcghLSk9JS1hCUXoKCNWCARIENDQ4NxIKCAEQARgBKgJMSBgBIgQIARABKAIoAygEMAs) - [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 Lambert-St. Louis International Airport (STL) - ![Iberia](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_IB.svg) Iberia [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"IB"}}]) - ![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:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![Virgin Atlantic](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_VS.svg) Virgin Atlantic [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"VS"}}]) - ![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:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"KL"}}]) - ![Finnair](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AY.svg) Finnair [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AY"}}]) - ![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:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:19/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![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\* - 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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) Fri, 23 Jan - Sun, 1 Feb LHR London STL St. Louis £443 Return found 7 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:23/01/2026TANYT&leg2=from:STL,to:LHR,departure:01/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:442.65&airProductToken=AQprCjQIzJABEgM5MjEY64kBIKUEKKaXgwMwhZiDAzhLQABYAWoIRUNPTElHSFRyCEtEVlFBWEJRCjMIzJABEgM0NDgYpQQg8lwo6ZiDAzDLnYMDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlEKhQEKQAjMkAESBDg3OTMY8lwgrhwoiIWEAzDvhYQDOEtAAFgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjVggESBDg3OTMKQQjMkAESBDkzNTUYrhwg64kBKJmGhAMwg4qEAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ5MzU1EgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Thu, 15 Jan - Sun, 18 Jan LHR London STL St. Louis £446 Return found 16 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:15/01/2026TANYT&leg2=from:STL,to:LHR,departure:18/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:445.65&airProductToken=AQq8AQpBCMyQARIENDE5MxjriQEgjBUorb6CAzCbv4IDOEtAAFgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjWmAESBDQxOTMKNAjMkAESAzQxMhiMFSDEjQEorsGCAzDFxYIDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlEKQQjMkAESBDc2NjIYxI0BIPJcKPHGggMwp8iCAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ3NjYyCocBCkEIzJABEgQ3NjYxGPJcIMSNASiS5IIDMK7lggM4S0AAWAFqCEVDT0xJR0hUcghLRFZRQVhCUXoKCNWCARIENzY2MQpCCMyQARIENzYzMBjEjQEg64kBKOTmggMwnOqCAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ3NjMwEgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Mon, 26 Jan - Mon, 2 Feb LHR London STL St. Louis £447 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:26/01/2026TANYT&leg2=from:STL,to:LHR,departure:02/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:446.75&airProductToken=AQqvAQo0CMyQARIDOTAxGOuJASClBCi6uoMDMJm7gwM4S0AAWAFqCEVDT0xJR0hUcghLRFZRQVhCUQo0CMyQARIDNDAyGKUEIMSNASjuu4MDMOy_gwM4S0ABWAFqCEVDT0xJR0hUcghLRFZRQVhCUQpBCMyQARIENzY2MhjEjQEg8lwo0cKDAzCHxIMDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjVggESBDc2NjIKhQEKQAjMkAESBDg5MjMY8lwgrhwo442EAzDCjoQDOEtAAFgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjVggESBDg5MjMKQQjMkAESBDkzNTcYrhwg64kBKPmOhAMw45KEAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ5MzU3EgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Brussels Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SN.gif) Tue, 10 Feb - Wed, 18 Feb LHR London STL St. Louis £448 Return found 11 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:10/02/2026TANYT&leg2=from:STL,to:LHR,departure:18/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:447.65&airProductToken=AQq9AQo2CNOcARIEMjEwNBjriQEgoaQBKPrhhAMwu-KEAzhLQABYAWoIRUNPTElHSFRyCEtEVlFBWEJRCkEI05wBEgQ4ODAxGKGkASCIGCjv44QDMPfnhAM4S0ABWAFqCEVDT0xJR0hUcghLRFZRQVhCUXoKCNWCARIEODgwMQpACNOcARIEOTAxMhiIGCDyXCi66YQDMNfqhAM4S0ABWAFqCEVDT0xJR0hUcghLRFZRQVhCUXoKCNWCARIEOTAxMgqFAQpACMyQARIEODc5MxjyXCCuHCi3xIUDMJTFhQM4S0AAWAFqCEVDT0xJR0hUcghLRFZRQVhCUXoKCNWCARIEODc5MwpBCMyQARIEOTM1NRiuHCDriQEow8WFAzCjyYUDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjVggESBDkzNTUSCggCEAEYAioCU04YASIECAEQASgCKAMoBDAL) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Thu, 5 Mar - Mon, 9 Mar LHR London STL St. Louis £451 Return found 5 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:05/03/2026TANYT&leg2=from:STL,to:LHR,departure:09/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:450.35&airProductToken=AQqtAQo0CMyQARIDOTA3GOuJASClBCjq54YDMMnohgM4S0AAWAFqCEVDT0xJR0hUcghLRFZRQVhCUQozCMyQARIDNDMyGKUEIK4cKJnphgMw3e2GAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRCkAIzJABEgQ4NzQ0GK4cIPJcKLXuhgMwi--GAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ4NzQ0CroBCkAIzJABEgQ4NzkzGPJcIK4cKOCZhwMwvZqHAzhLQABYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1YIBEgQ4NzkzCjMIzJABEgM0MzUYrhwgjBUoxpuHAzC6n4cDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlEKQQjMkAESBDQxOTYYjBUg64kBKOmghwMw4aGHAzhLQAFYAWoIRUNPTElHSFRyCEtEVlFBWEJRegoI1pgBEgQ0MTk2EgoIAhABGAIqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Wed, 23 Sept - Sat, 3 Oct LHR London STL St. Louis £456 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:23/09/2026TANYT&leg2=from:STL,to:LHR,departure:03/10/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:455.75&airProductToken=AQqsAQo0CM-mARIDMzM4GOuJASCVIijWypgDMNjLmAM4S0AAWAFqCEVDT0xJR0hUcghLRFZRQVhCUQoyCM-mARICNDUYlSIgrhwontGYAzDs1ZgDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlEKQAjPpgESBDc3MzUYrhwg8lwo09aYAzCm15gDOEtAAVgBaghFQ09MSUdIVHIIS0RWUUFYQlF6CgjVggESBDc3MzUKhQEKQAjPpgESBDc3MzYY8lwgrhwok7uZAzDru5kDOEtAAFgBaghFQ09MSUdIVHIIS0QzVkFYQlF6CgjVggESBDc3MzYKQQjPpgESBDc4NTAYrhwg64kBKMW8mQMwucCZAzhLQAFYAWoIRUNPTElHSFRyCEtEM1ZBWEJRegoI1YIBEgQ3ODUwEgoIAhABGAIqAk9TGAEiBAgBEAEoAigDKAQwCw) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, 28 Jan - Wed, 4 Feb LHR London STL St. Louis £460 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:28/01/2026TANYT&leg2=from:STL,to:LHR,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:459.65&airProductToken=AQqFAQpBCNWCARIEOTU0NhjriQEgpQQoxs-DAzCl0IMDOEtAAFgBaghFQ09CQVNJQ3IIS0RWUUtYQlF6CgjMkAESBDk1NDYKQAjVggESBDkwNjYYpQQg8lwoidGDAzDr1YMDOEtAAVgBaghFQ09CQVNJQ3IIS0RWUUtYQlF6CgjMkAESBDkwNjYKbAo0CNWCARIENDQ1NBjyXCCIGCiEpIQDMIelhAM4S0AAWAFqCEVDT0JBU0lDcghLRFZRS1hCUQo0CNWCARIDOTE4GIgYIOuJASiYpoQDMNCphAM4S0ABWAFqCEVDT0JBU0lDcghLRFZRS1hCURIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAE) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Mon, 26 Jan - Mon, 2 Feb LHR London STL St. Louis £470 Return found 2 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:26/01/2026TANYT&leg2=from:STL,to:LHR,departure:02/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:469.79&airProductToken=AQqDAQpACMKCARIEMTU5OBjriQEg4poBKMG7gwMw8b-DAzhPQABYAWoFTk9CQUdyCU9MWDdIMUI0UHoKCMGCARIEMTU5OAo_CMKCARIENjg0MxjimgEg8lwowcCDAzDCwYMDOE9AAVgBagVOT0JBR3IJT0xYN0gxQjRQegoIwYIBEgQ2ODQzCoMBCj8IwoIBEgQ2OTgzGPJcIKOxASjIj4QDMNCQhAM4T0AAWAFqBU5PQkFHcglPTFg3SDFCNFB6CgjBggESBDY5ODMKQAjCggESBDE1MjEYo7EBIOuJASibkYQDMLyVhAM4T0ABWAFqBU5PQkFHcglPTFg3SDFCNFB6CgjBggESBDE1MjESCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Mon, 2 Feb - Thu, 12 Feb LHR London STL St. Louis £470 Return found 17 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:02/02/2026TANYT&leg2=from:STL,to:LHR,departure:12/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:469.79&airProductToken=AQpoCjIIwYIBEgM3MzMY64kBIOKaASihioQDMNGOhAM4QkAAWAFqBUJBU0lDcghPTFg3SDFCNAoyCMGCARIEMjkzNxjimgEg8lwooY-EAzCikIQDOEJAAVgBagVCQVNJQ3IIT0xYN0gxQjQKcwoxCMGCARIEMzE2MhjyXCDvWSjQ_oQDMNn_hAM4QkAAWAFqBUJBU0lDcghPTFg3SDFCNAo-CMGCARIENjkxMRjvWSDriQEop4CFAzDLg4UDOE9AAVgBagVCQVNJQ3IIT0xYN0gxQjR6CgjCggESBDY5MTESCggCEAEYAioCQUEYASIECAEQASgCKAMoBDAL) ![Brussels Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SN.gif) Tue, 10 Feb - Wed, 18 Feb LHR London STL St. Louis £473 Return found 11 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:STL,departure:10/02/2026TANYT&leg2=from:STL,to:LHR,departure:18/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:472.25&airProductToken=AQq9AQo2CNOcARIEMjEwNBjriQEgoaQBKPrhhAMwu-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) ## Find the cheapest month to fly from London (LHR) to St. Louis (STL) ### November is typically the cheapest month to fly From £520 - £1,111 per traveller. ## Alternative airports near St. Louis 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:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:14/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) STL Lambert-St. Louis Intl. Cheapest 20 min [Flights from £487 ](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:STL,departure:12/01/2026TANYT&leg2=from:STL,to:LHR,departure:14/02/2026TANYT&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 (LHR) to Lambert Field? ### Do I need to pay a cancellation fee if I cancel my flight from Heathrow Airport (LHR) to Lambert-St. Louis Intl. Airport (STL)? ### How do I find cheap flights from Heathrow Airport to St. Louis Lambert International Airport that have flexible change policies? ### How far is the flight from LHR to Lambert-St. Louis Intl. Airport (STL)? ### Which airlines fly direct from LHR to Lambert-St. Louis Intl. Airport (STL)? ### Are Heathrow Airport (LHR) to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Heathrow | | ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Lambert-St. Louis Intl. | | Airlines serving | Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, United, Virgin Atlantic | | Return price | £443 | | Distance | 6703 km | ## Book with confidence # Compare flights from London to St. Louis easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to St. Louis. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to Lambert-St. Louis Intl.. 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 Lambert-St. Louis Intl. (STL) The easiest way to view the best deals on flights from London to St. Louis 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 Lambert-St. Louis Intl. start at just £443 and range up to £473\. To find an even better deal, try - being flexible on your dates – midweek flights can be cheaper - looking for other airports near London and St. Louis - booking your flight during January, 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 St. Louis flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Lambert-St. Louis Intl. 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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