Title: £268 Cheap Flights from Ontario to London (ONT to LON) - 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) # £268 Cheap Flights from Ontario (ONT) to London (LON) [View £268 flight on Thu, 10 Sept 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:ONT,to:LHR,departure:10/09/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:267.60&airProductToken=AQpfCi0IwmwSAzQ1NBiumwEgqVEo5L2XAzCmwJcDOExAAFgBagJETnIITUw4TEJWTDEKLgjCbBIEMTEwNxipUSDriQEo_cCXAzChxJcDOExAAVgBagJETnIITUw4TEJWTDESCggBEAEYASoCQjYYASIECAEQASgCKAQoBjAB) - [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 Los Angeles - Ontario Intl. Airport (ONT) to London - ![](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:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](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:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"IB"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](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:ONT,to:LON,departure:17/02/2026TANYT&leg2=from:LON,to:ONT,departure:24/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![](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\* - ![](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\* - ![](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 Ontario (ONT) to London (LON) Prices were available within the past 7 days and start at £268 for one-way flights and £455 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Iberia](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/IB.gif) Fri, 27 Feb - Mon, 2 Mar ONT Ontario LHR London £455 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:27/02/2026TANYT&leg2=from:LHR,to:ONT,departure:02/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:454.85&airProductToken=AQqCAQo_CMmEARIENDQ2NhiumwEgo7EBKISlhgMwuKaGAzhPQABYAWoFQkFTSUNyCE9MTjhUMUJWegoIwYIBEgQ0NDY2Cj8IyYQBEgQ0MTkyGKOxASDriQEomaiGAzC6rIYDOE9AAVgBagVCQVNJQ3IIT0xOOFQxQlZ6CgjBggESBDQxOTIKpwEKMQjJhAESAzcyMhjriQEgjBgoxciGAzDWyYYDOE9AAFgBagVCQVNJQ3IIT0xOOFQxQlYKMQjJhAESAzM2MxiMGCCjsQEo-8qGAzCy0IYDOE9AAVgBagVCQVNJQ3IIT0xOOFQxQlYKPwjJhAESBDQ4MzQYo7EBIK6bASjw0YYDML7ThgM4T0ABWAFqBUJBU0lDcghPTE44VDFCVnoKCMGCARIENDgzNBIKCAEQARgBKgJJQhgBIgQIARABKAIoAygEMA0) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Thu, 26 Feb - Wed, 11 Mar ONT Ontario LHR London £456 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:26/02/2026TANYT&leg2=from:LHR,to:ONT,departure:11/03/2026TANYT&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=AQq_AQo-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) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Tue, 5 May - Wed, 13 May ONT Ontario LHR London £466 Return found 12 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:05/05/2026TANYT&leg2=from:LHR,to:ONT,departure:13/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:465.25&airProductToken=AQqAAQo-CMuYARIENjcyMBiumwEg4FworZaMAzCnmIwDOFZAAFgBagVMSUdIVHIIVkxYNTZTQkR6CgjEmAESBDY3MjAKPgjLmAESBDYwNDMY4Fwg64kBKMyZjAMwxZ2MAzhWQAFYAWoFTElHSFRyCFZMWDU2U0JEegoIxJgBEgQ2MDQzCqgBCjMIy5gBEgQxMDA2GOuJASCAkwEo5e6MAzC174wDOExAAFgBagVMSUdIVHIIVkxYNTZTQkQKMQjLmAESAzYwORiAkwEg8hIogvGMAzDa9YwDOFZAAVgBagVMSUdIVHIIVkxYNTZTQkQKPgjLmAESBDcxMzQY8hIgrpsBKJ33jAMwiviMAzhWQAFYAWoFTElHSFRyCFZMWDU2U0JEegoIxJgBEgQ3MTM0EgoIARABGAEqAktMGAEiBAgBEAEoAigDKAQwDQ) ![Iberia](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/IB.gif) Tue, 5 May - Wed, 13 May ONT Ontario LHR London £467 Return found 12 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:05/05/2026TANYT&leg2=from:LHR,to:ONT,departure:13/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:466.15&airProductToken=AQqCAQo_CMmEARIENDYwNBiumwEgo7EBKNSZjAMwj5uMAzhPQABYAWoFQkFTSUNyCE9MWDVUMUJWegoIwYIBEgQ0NjA0Cj8IyYQBEgQ0MjA2GKOxASDriQEo85uMAzCeoIwDOE9AAVgBagVCQVNJQ3IIT0xYNVQxQlZ6CgjBggESBDQyMDYKpwEKMQjJhAESAzcxNhjriQEgjBgo1u6MAzDn74wDOE9AAFgBagVCQVNJQ3IIT0xYNVQxQlYKMQjJhAESAzM2MxiMGCCjsQEoo_CMAzDG9YwDOE9AAVgBagVCQVNJQ3IIT0xYNVQxQlYKPwjJhAESBDQ0MzAYo7EBIK6bASjX9owDMJb4jAM4T0ABWAFqBUJBU0lDcghPTFg1VDFCVnoKCMGCARIENDQzMBIKCAEQARgBKgJJQhgBIgQIARABKAIoAygEMA0) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Tue, 3 Mar - Mon, 9 Mar ONT Ontario LHR London £474 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:03/03/2026TANYT&leg2=from:LHR,to:ONT,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:473.99&airProductToken=AQqCAQo_CMKCARIENTExMRiumwEgo7EBKM_VhgMwiNeGAzhPQABYAWoFTk9CQUdyCE9MTjhUMUJWegoIwYIBEgQ1MTExCj8IwoIBEgQxNTIxGKOxASDriQEotteGAzDc24YDOE9AAVgBagVOT0JBR3IIT0xOOFQxQlZ6CgjBggESBDE1MjEKdQoyCMKCARIDMjg5GOuJASDvuQEooZWHAzCwmocDOE9AAFgBagVOT0JBR3IIT0xOOFQxQlYKPwjCggESBDY5MTYY77kBIK6bASjEm4cDMJOchwM4T0ABWAFqBU5PQkFHcghPTE44VDFCVnoKCMGCARIENjkxNhIKCAEQARgBKgJCQRgBIgQIARABKAIoAzAN) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Sat, 28 Feb - Mon, 9 Mar ONT Ontario LHR London £475 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:28/02/2026TANYT&leg2=from:LHR,to:ONT,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:474.69&airProductToken=AQp1Cj8IwoIBEgQ2Nzk1GK6bASDvuQEo_rSGAzDRtYYDOE9AAFgBagVOT0JBR3IIT0xOOFQxQlZ6CgjBggESBDY3OTUKMgjCggESAzI4OBjvuQEg64kBKI22hgMw27qGAzhPQAFYAWoFTk9CQUdyCE9MTjhUMUJWCnUKMgjCggESAzI4ORjriQEg77kBKKGVhwMwsJqHAzhPQABYAWoFTk9CQUdyCE9MTjhUMUJWCj8IwoIBEgQ2OTE2GO-5ASCumwEoxJuHAzCTnIcDOE9AAVgBagVOT0JBR3IIT0xOOFQxQlZ6CgjBggESBDY5MTYSCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) ![Virgin Atlantic](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/VS.gif) Thu, 26 Feb - Wed, 11 Mar ONT Ontario LHR London £476 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:26/02/2026TANYT&leg2=from:LHR,to:ONT,departure:11/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:475.89&airProductToken=AQqxAQo-CNamARIENTM5NxiumwEg4Fwo25yGAzDanoYDOFRAAFgBagVMSUdIVHIIT0xOODZTQkR6CgjEmAESBDUzOTcKPQjWpgESBDQ3NTAY4FwgqVEo0p-GAzDeoIYDOFRAAVgBagVMSUdIVHIIT0xOODZTQkR6CgjEmAESBDQ3NTAKMAjWpgESAjI2GKlRIOuJASigpIYDMLqnhgM4VEABWAFqBUxJR0hUcghPTE44NlNCRAq_AQo-CNamARIENDAzNhjriQEgkgEo5KqHAzDQr4cDOFRAAFgBagVMSUdIVHIIT0xOODZTQkR6CgjEmAESBDQwMzYKPQjWpgESBDI2MjIYkgEg8hIom7CHAzCSsYcDOFRAAVgBagVMSUdIVHIIT0xOODZTQkR6CgjEmAESBDI2MjIKPgjWpgESBDM1ODMY8hIgrpsBKMiyhwMwu7OHAzhUQAFYAWoFTElHSFRyCE9MTjg2U0JEegoIxJgBEgQzNTgzEgoIARABGAEqAlZTGAEiBAgBEAEoAigDKAQwAQ) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Sat, 28 Feb - Sun, 8 Mar ONT Ontario LHR London £476 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:28/02/2026TANYT&leg2=from:LHR,to:ONT,departure:08/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:475.89&airProductToken=AQqCAQo_CMKCARIENTExMRiumwEgo7EBKO-zhgMwqLWGAzhPQABYAWoFTk9CQUdyCE9MTjhUMUJWegoIwYIBEgQ1MTExCj8IwoIBEgQxNTIxGKOxASDriQEo1rWGAzD8uYYDOE9AAVgBagVOT0JBR3IIT0xOOFQxQlZ6CgjBggESBDE1MjEKdQoyCMKCARIDMjg5GOuJASDvuQEo_ImHAzCLj4cDOE9AAFgBagVOT0JBR3IIT0xOOFQxQlYKPwjCggESBDY5MTYY77kBIK6bASikkIcDMPOQhwM4T0ABWAFqBU5PQkFHcghPTE44VDFCVnoKCMGCARIENjkxNhIKCAEQARgBKgJCQRgBIgQIARABKAIoAzAN) ![Virgin Atlantic](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/VS.gif) Tue, 5 May - Wed, 13 May ONT Ontario LHR London £486 Return found 12 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:05/05/2026TANYT&leg2=from:LHR,to:ONT,departure:13/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:485.55&airProductToken=AQqAAQo-CNamARIENTM5NxiumwEg4FwohZmMAzD_mowDOFRAAFgBagVMSUdIVHIIT0xYNTZTQkR6CgjEmAESBDUzOTcKPgjWpgESBDQwNjcY4Fwg64kBKOacjAMw36CMAzhUQAFYAWoFTElHSFRyCE9MWDU2U0JEegoIxJgBEgQ0MDY3CqgBCjMIy5gBEgQxMDA2GOuJASCAkwEo5e6MAzC174wDOExAAFgBagVMSUdIVHIIVkxYNTZTQkQKMQjLmAESAzYwORiAkwEg8hIogvGMAzDa9YwDOFZAAVgBagVMSUdIVHIIVkxYNTZTQkQKPgjLmAESBDcxMzQY8hIgrpsBKJ33jAMwiviMAzhWQAFYAWoFTElHSFRyCFZMWDU2U0JEegoIxJgBEgQ3MTM0EgoIARABGAEqAlZTGAEiBAgBEAEoAigDKAQwAQ) ![Air France](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AF.gif) Tue, 5 May - Wed, 13 May ONT Ontario LHR London £486 Return found 12 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:05/05/2026TANYT&leg2=from:LHR,to:ONT,departure:13/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:485.99&airProductToken=AQqAAQo-CMGMARIENTgzORiumwEg4FworZaMAzCnmIwDOFZAAFgBagVMSUdIVHIIVkxYNTZTQkR6CgjEmAESBDU4MzkKPgjBjAESBDM1NTUY4Fwg64kBKMyZjAMwxZ2MAzhWQAFYAWoFTElHSFRyCFZMWDU2U0JEegoIxJgBEgQzNTU1CoABCj4IwYwBEgQzNTg3GOuJASDgXCjU7YwDMP7xjAM4VkAAWAFqBUxJR0hUcghWTFg1NlNCRHoKCMSYARIEMzU4Nwo-CMGMARIEMzUyORjgXCCumwEokPWMAzCm94wDOFZAAVgBagVMSUdIVHIIVkxYNTZTQkR6CgjEmAESBDM1MjkSCggBEAEYASoCQUYYASIECAEQASgCKAMoBDAN) ## 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:ONT,to:LHR,departure:17/02/2026TANYT&leg2=from:LHR,to:ONT,departure:19/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LHR Heathrow Cheapest 28 min [Flights from £815 ](https://www.expedia.co.uk/Flights-Search?leg1=from:ONT,to:LHR,departure:17/02/2026TANYT&leg2=from:LHR,to:ONT,departure:19/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from Ontario (ONT) to London (LON) ### September is typically the cheapest month to fly From £403 - £843 per traveller. __Flight from Ontario to London route information__ | Origin airport | Los Angeles - Ontario Intl. | | ------------------- | --------------------------- | | Destination airport | Heathrow | | Return price | £455 | | Distance | 8655 km | ## Compare flights from Ontario to London easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ontario to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to LON-All Airports in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Los Angeles - Ontario Intl. to LON-All Airports. 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 Los Angeles - Ontario Intl. (ONT) to LON-All Airports (LON) The easiest way to view the best deals on flights from Ontario 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 Los Angeles - Ontario Intl. to LON-All Airports start at just £455 and range up to £486\. To find an even better deal, try - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Ontario and London - booking your flight during February, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper Why you should book your Ontario to London flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Los Angeles - Ontario Intl. to LON-All Airports 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. ## Frequently asked questions ### How much is a flight from Ontario Airport to London (LON-All Airports)? ### Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to London (LON-All Airports)? ### How do I find cheap flights from ONT to London (LON-All Airports) that have flexible change policies? ### How far is the flight from ONT to London (LON-All Airports)? ### Which airlines fly direct from Ontario Airport to London (LON-All Airports)? ### Are Los Angeles - Ontario Intl. Airport (ONT) to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute? ## Explore a world of travel with Expedia - Accommodation - Flights - [London Hotels ](https://www.expedia.co.uk/London-Hotels.d178279.Travel-Guide-Hotels) - [Flights to London ](https://www.expedia.co.uk/Cheap-Flights-To-London.d178279.Travel-Guide-Flights) - [Flights from Aberdeen (ABZ) to London (LCY) ](https://www.expedia.co.uk/lp/flights/abz/lcy/aberdeen-to-london) - [Flights from Accra (ACC) to London (LCY) ](https://www.expedia.co.uk/lp/flights/acc/lcy/accra-to-london) - [Flights from Málaga (AGP) to London (LCY) ](https://www.expedia.co.uk/lp/flights/agp/lcy/malaga-to-london) - [Flights from Amsterdam (AMS) to London (LCY) ](https://www.expedia.co.uk/lp/flights/ams/lcy/amsterdam-to-london) - [Flights from Antwerp (ANR) to London (LCY) ](https://www.expedia.co.uk/lp/flights/anr/lcy/antwerp-to-london) - [Flights from Stockholm (ARN) to London (LCY) ](https://www.expedia.co.uk/lp/flights/arn/lcy/stockholm-to-london) - 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