Title: £166 Cheap United flights from Boston to London (BOS→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) # £166 Cheap United flights from Boston to London (BOS→LHR) [View £166 flight on Tue, 17 Mar 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:BOS,to:LHR,departure:17/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:166.00&airProductToken=AQpuCjYI1YIBEgQxODA3GMGTASDEjQEoifKHAzDl8ocDOFRAAFgBaghFQ09CQVNJQ3IIVExEODBUQlEKNAjVggESAjE2GMSNASDriQEopPOHAzDc9ocDOFRAAVgBaghFQ09CQVNJQ3IIVExEODBUQlESCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAB) - [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 - ![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) ## United flights from Boston to London (BOS→LHR) Prices were available within the past 7 days and start at £166 for one-way flights and £302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, 18 Feb - Thu, 19 Feb BOS Boston LHR London £302 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:BOS,to:LHR,departure:18/02/2026TANYT&leg2=from:LHR,to:BOS,departure:19/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:301.51&airProductToken=AQpvCjYI1YIBEgQxODMzGMGTASDEjQEo9L2FAzDLvoUDOExAAFgBaghFQ09CQVNJQ3IITExYMjBUQlEKNQjVggESAzkzNBjEjQEg64kBKIW_hQMws8KFAzhMQAFYAWoIRUNPQkFTSUNyCExMWDIwVEJRCmsKNAjPpgESAzMzOBjriQEglSIojc2FAzCUzoUDOExAAFgBaghFQ09MSUdIVHIITExYMjBUQlEKMwjPpgESAjMxGJUiIMGTASjp04UDMJnYhQM4TEABWAFqCEVDT0xJR0hUcghMTFgyMFRCURIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAE) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, 18 Mar - Fri, 20 Mar BOS Boston LHR London £304 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:BOS,to:LHR,departure:18/03/2026TANYT&leg2=from:LHR,to:BOS,departure:20/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:303.31&airProductToken=AQpGCiEI1YIBEgQ4NDgzGMGTASCYXSj3_IcDMMz9hwM4TEAAWAEKIQjVggESBDgyOTYYmF0g64kBKIr_hwMwroKIAzhMQAFYAQpDCiAIz6YBEgMzNDAY64kBIJUiKIiNiAMwio6IAzhMQABYAQofCM-mARICMzEYlSIgwZMBKOmOiAMwmZOIAzhMQAFYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, 8 Jan - Fri, 16 Jan BOS Boston LHR London £377 Return found 15 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:BOS,to:LHR,departure:08/01/2026TANYT&leg2=from:LHR,to:BOS,departure:16/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:376.55&airProductToken=AQpHCiII1YIBEgQxODMzGMGTASDEjQEo1PCBAzCt8YEDOExAAFgBCiEI1YIBEgM5MzQYxI0BIOuJASjl8YEDMJP1gQM4TEABWAEKRgohCNWCARIEOTc1ORjriQEguTwo-cuCAzDxzIIDOExAAFgBCiEI1YIBEgQ5NzIyGLk8IMGTASiezYIDMJzRggM4TEABWAESCggBEAEYASoCVUEYASIECAEQASgEMAE) ## Find the cheapest month to fly from Boston (BOS) to London (LHR) ### October is typically the cheapest month to fly From £290 - £392 per traveller. ## 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:BOS,to:LGW,departure:19/01/2026TANYT&leg2=from:LGW,to:BOS,departure:01/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LGW Gatwick 52 min [Flights from £398 ](https://www.expedia.co.uk/Flights-Search?leg1=from:BOS,to:LGW,departure:19/01/2026TANYT&leg2=from:LGW,to:BOS,departure:01/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) [](https://www.expedia.co.uk/Flights-Search?leg1=from:BOS,to:LCY,departure:19/01/2026TANYT&leg2=from:LCY,to:BOS,departure:01/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LCY London City Closest 21 min [Flights from £428 ](https://www.expedia.co.uk/Flights-Search?leg1=from:BOS,to:LCY,departure:19/01/2026TANYT&leg2=from:LCY,to:BOS,departure:01/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Travel information | Origin airport | Logan Intl. | | ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Heathrow | | Airlines serving | Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, SATA International-Azores Airlines S.A., Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic | | Popular airline | Iberia | | Distance | 5210 km | | Average flight time | 11 hours 40 mins | \*Available to Expedia members.