Title: CA $553 Cheap Flights from Ontario (ONT) to London (LHR) - Expedia.ca ![](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) # CA $553 Cheap Flights from Ontario (ONT) to London (LHR) [View CA $553 flight on Tue, Oct 21, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:ONT,to:LHR,departure:21/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:552.60&airProductToken=AQpwCjcI1YIBEgQxNDE3GK6bASCDaSif_PoCMKf9-gI4V0AAWAFqCjFfYmFzaWNlY29yCFdMODQwTEdUCjUI1YIBEgIyNxiDaSDriQEo5_36AjCIgvsCOFdAAFgBagoxX2Jhc2ljZWNvcghXTDg0MExHVBIKCAEQARgBKgJVQRgBIgQIARABKAIoAygEMAs) - [Roundtrip](?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 Heathrow Airport (LHR) - ![British Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Iberia](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_IB.svg) Iberia [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"IB"}}]) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![Virgin Atlantic](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_VS.svg) Virgin Atlantic [](https://www.expedia.ca/Flights-Search?leg1=from:ont,to:lhr,departure:17/10/2025TANYT&leg2=from:lhr,to:ont,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"VS"}}]) ![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 30% 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.ca/login) ## Cheap flights from Ontario (ONT) to London (LHR) Prices were available within the past 7 days and start at CA $553 for one-way flights and CA $931 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Tue, Oct 14 - Tue, Oct 28 ONT Ontario LHR London CA $931 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:14/10/2025TANYT&leg2=from:LHR,to:ONT,departure:28/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:930.70&airProductToken=AQpECiAI1YIBEgM3MTUYrpsBIINpKPOu-gIw_K_6AjhMQABYAQogCNWCARIDMjYyGINpIOuJASissPoCMMi0-gI4TEABWAEKRAofCNWCARICMjYY64kBIINpKPfG-wIwysv7AjhMQABYAQohCNWCARIEMTEwORiDaSCumwEosc37AjDAzvsCOExAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Mon, Nov 10 - Tue, Nov 18 ONT Ontario LHR London CA $932 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:10/11/2025TANYT&leg2=from:LHR,to:ONT,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:931.56&airProductToken=AQqaAQoyCMGGARIENTQyMxiumwEgg2ko8dn8AjD32vwCOExAAFgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESBDEwNzQYg2kgmF0op9z8AjCG3vwCOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESAzg2NBiYXSDriQEoit_8AjCu4vwCOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKnAEKMgjBhgESAzg2MRjriQEguI0BKMa0_QIwmbn9AjhMQABYAWoFQkFTSUNyCExMMjQ3TEdUCjIIwYYBEgQ4ODQ2GLiNASCycSiCuv0CMJK7_QI4TEABWAFqBUJBU0lDcghMTDI0N0xHVAoyCMGGARIENDEyMhiycSCumwEoyrv9AjCbvP0COExAAVgBagVCQVNJQ3IITEwyNDdMR1QSCggCEAEYAioCQUMYASIECAEQASgCKAMoBDAN) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Mon, Oct 13 - Tue, Oct 28 ONT Ontario LHR London CA $932 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:13/10/2025TANYT&leg2=from:LHR,to:ONT,departure:28/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:931.60&airProductToken=AQpqCjMIwoIBEgQ2Nzk1GK6bASDvuQEo9aP6AjDDpPoCOE9AAFgBagVOT0JBR3IIT0xYNEQ3QlYKMwjCggESBDE1MjcY77kBIOuJASjupPoCMMap-gI4T0ABWAFqBU5PQkFHcghPTFg0RDdCVgppCjIIwoIBEgMxOTMY64kBIKOxASjEyPsCMKbN-wI4T0AAWAFqBU5PQkFHcghPTFg0RDdCVgozCMKCARIEMjQzMRijsQEgrpsBKPvN-wIwts_7AjhPQAFYAWoFTk9CQUdyCE9MWDREN0JWEgoIARABGAEqAkJBGAEiBAgBEAEoAigDMA0) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Tue, Oct 21 - Tue, Dec 9 ONT Ontario LHR London CA $934 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:21/10/2025TANYT&leg2=from:LHR,to:ONT,departure:09/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:933.10&airProductToken=AQpqCjMIwoIBEgQ2Nzk1GK6bASDvuQEo9f36AjDD_voCOE9AAFgBagVOT0JBR3IIT0xYNEQ3QlYKMwjCggESBDE1MjcY77kBIOuJASju_voCMMaD-wI4T0ABWAFqBU5PQkFHcghPTFg0RDdCVgpqCjMIwoIBEgQxNTk4GOuJASDimgEowZ__AjDso_8COE9AAFgBagVOT0JBR3IIT0xYNEQ3QlYKMwjCggESBDE2NzUY4poBIK6bASi_pP8CMPum_wI4T0ABWAFqBU5PQkFHcghPTFg0RDdCVhIKCAEQARgBKgJCQRgBIgQIARABKAIoAzAN) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Tue, Oct 14 - Tue, Oct 21 ONT Ontario LHR London CA $934 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:14/10/2025TANYT&leg2=from:LHR,to:ONT,departure:21/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:933.78&airProductToken=AQpoCjMIwYIBEgQxODIwGK6bASCjsQEotaz6AjDnrfoCOEJAAFgBagVCQVNJQ3IIT0xYNEQ3QlYKMQjBggESAjgwGKOxASDriQEo0q_6AjDus_oCOEJAAVgBagVCQVNJQ3IIT0xYNEQ3QlYKaAoxCMGCARICNzkY64kBIKOxASj09_oCMOX8-gI4QkAAWAFqBUJBU0lDcghPTFg0RDdCVgozCMGCARIEMTE2MhijsQEgrpsBKJv_-gIw1oD7AjhCQAFYAWoFQkFTSUNyCE9MWDREN0JWEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Mon, Nov 10 - Tue, Nov 18 ONT Ontario LHR London CA $941 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:10/11/2025TANYT&leg2=from:LHR,to:ONT,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:940.60&airProductToken=AQqaAQoyCMGGARIENTQyMxiumwEgg2ko8dn8AjD32vwCOExAAFgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESBDEwNzQYg2kgmF0op9z8AjCG3vwCOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESAzg2NBiYXSDriQEoit_8AjCu4vwCOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKnAEKMgjBhgESAzg1ORjriQEgmM4BKJi2_QIwgrr9AjhMQABYAWoFQkFTSUNyCExMMjQ3TEdUCjIIwYYBEgQ0MTA1GJjOASCycSiyvv0CMJ_B_QI4TEABWAFqBUJBU0lDcghMTDI0N0xHVAoyCMGGARIENDA4MRiycSCumwEog8L9AjDVwv0COExAAVgBagVCQVNJQ3IITEwyNDdMR1QSCggCEAEYAioCQUMYASIECAEQASgCKAMoBDAN) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Tue, Oct 14 - Tue, Oct 21 ONT Ontario LHR London CA $943 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:14/10/2025TANYT&leg2=from:LHR,to:ONT,departure:21/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:942.82&airProductToken=AQqbAQoyCMGGARIENDQyNBiumwEgsnEo5Kv6AjCzrPoCOExAAFgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESAzc0MBiycSCYzgEog636AjCqr_oCOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKMgjBhgESAzg1MhiYzgEg64kBKPqv-gIwvLP6AjhMQAFYAWoFQkFTSUNyCExMMjQ3TEdUCm0KNAjVggESAzkwMBjriQEgsnEon_f6AjC4_PoCOExAAFgBaghFQ09CQVNJQ3IITEwyNDdMR1QKNQjVggESBDE3NzIYsnEgrpsBKNj9-gIwqP76AjhMQAFYAWoIRUNPQkFTSUNyCExMMjQ3TEdUEgoIARABGAEqAkFDGAEiBAgBEAEoAigDKAQwAQ) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, Apr 15 - Wed, Apr 22 ONT Ontario LHR London CA $954 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:15/04/2026TANYT&leg2=from:LHR,to:ONT,departure:22/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:953.96&airProductToken=AQqaAQoyCMGGARIENTQyMxiumwEgg2kosLSKAzCztYoDOExAAFgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESBDEwNzQYg2kgmF0o4baKAzDDuIoDOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESAzg2NhiYXSDriQEov7mKAzDKvIoDOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKmgEKMQjBhgESAzg1MRjriQEgmBYo64GLAzCChosDOExAAFgBagVCQVNJQ3IITEwyNDdMR1QKMQjBhgESBDQyMTAYmBYgsnEoyoeLAzD_iIsDOExAAVgBagVCQVNJQ3IITEwyNDdMR1QKMgjBhgESBDQxMjIYsnEgrpsBKNqKiwMwuYuLAzhMQAFYAWoFQkFTSUNyCExMMjQ3TEdUEgoIAhABGAIqAkFDGAEiBAgBEAEoAigDKAQwDQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Mon, Dec 1 - Fri, Dec 19 ONT Ontario LHR London CA $958 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:01/12/2025TANYT&leg2=from:LHR,to:ONT,departure:19/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:957.70&airProductToken=AQpECiEIxJgBEgQxODk2GK6bASDyEiiAyv4CMOvK_gI4RUAAWAEKHwjEmAESAjUwGPISIOuJASivy_4CMPjP_gI4RUABWAEKRQohCMSYARIENTk5ORjriQEg4FwoxY-AAzD_k4ADOEVAAFgBCiAIxJgBEgM3NzAY4FwgrpsBKJ2VgAMwt5eAAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Tue, Oct 14 - Tue, Oct 21 ONT Ontario LHR London CA $962 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:LHR,departure:14/10/2025TANYT&leg2=from:LHR,to:ONT,departure:21/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:961.78&airProductToken=AQpoCjIIy5gBEgQ2OTE3GK6bASDgXCjNqvoCMMes-gI4VkAAWAFqBUxJR0hUcghWTFg0N05CTAoyCMuYARIENDgxMxjgXCDriQEot676AjCXsvoCOFZAAVgBagVMSUdIVHIIVkxYNDdOQkwKmwEKMgjLmAESBDQ4MTQY64kBIIgYKJf4-gIwkPz6AjhWQABYAWoFTElHSFRyCFZMWDQ3TkJMCjEIy5gBEgQ1OTUxGIgYIOBcKID9-gIw-f36AjhWQAFYAWoFTElHSFRyCFZMWDQ3TkJMCjIIy5gBEgQ2MzQyGOBcIK6bASi1_voCMMKA-wI4VkABWAFqBUxJR0hUcghWTFg0N05CTBIKCAEQARgBKgJLTBgBIgQIARABKAIoAygEMA0) ## Find the cheapest month to fly from Ontario (ONT) to London (LHR) ### September is typically the cheapest month to fly From CA $735 - CA $1,463 per traveller. ## Alternative airports near London Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:ONT,to:LHR,departure:17/10/2025TANYT&leg2=from:LHR,to:ONT,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LHR Heathrow Cheapest 28 min [Flights from CA $1,004](https://www.expedia.ca/Flights-Search?leg1=from:ONT,to:LHR,departure:17/10/2025TANYT&leg2=from:LHR,to:ONT,departure:24/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) Flight from Ontario to London (ONT - LHR) route information | Origin airport | Los Angeles - Ontario Intl. | | --- | --- | | Destination airport | Heathrow | | Airlines serving | British Airways | | Roundtrip price | CA $931 | | Distance | 8655 km | ## Los Angeles to London Flights **The easy way to book your flights from Ontario to London**  With Expedia, it’s simple to find and book flights to London from Ontario whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Heathrow, too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario to London today, tomorrow, or this week.   **Save dollars with cheap flights from Los Angeles - Ontario Intl., ONT to Heathrow, LHR**  Sort your search results by price to find great deals on your flight from Ontario to London—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to London from Ontario currently is just CA $931 rising to CA $962.   Here are more money-saving tips:  - Fly in October when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to London   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to London from Ontario**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to London with Expedia today. ## Frequently asked questions ### How much is a flight from ONT to London Heathrow? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip journey between ONT and LHR was CA $931. Great fares don't last long, so book yours today. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from ONT to LHR? > The majority of flights can be conveniently cancelled online, but whether or not you incur a fee differs between airlines. If you do need to cancel your getaway, follow the instructions in the [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Ontario Airport to Heathrow Airport that have flexible change policies? > Flights from Los Angeles - Ontario Intl. Airport (ONT) to London Heathrow offering flexible change policies are available from several carriers. Simply use our "No change fees" filter while searching. You'll only need to pay the difference in ticket price, with no added fees to worry about. ### How many hours is the flight from Ontario Airport to London Heathrow? > The flight time from Los Angeles - Ontario Intl. Airport (ONT) to LHR is roughly 13 hours and 55 minutes. It's is no small journey, so be sure to fill your carry-on bag with whatever you need to be comfortable. ### How far is the flight from ONT to Heathrow Airport? > You'll have 8,700 kilometres to cover on the long-haul Ontario to Hounslow route. Wear comfy clothes and consider taking earplugs and a sleep mask. ### Which airlines fly direct from Ontario Airport to London Heathrow? > At the moment, no airlines offer flights directly from Los Angeles - Ontario Intl. Airport (ONT) to London Heathrow. You'll have to book a flight with at least one stop. To score the best connections and price, lock in your fare ahead of time. ### Are Ontario Airport to Heathrow Airport flight tickets cheaper when they're purchased at the last minute? > Flight prices always go up and down, so it's no sure thing. While last-minute flight deals between ONT and London Heathrow are of course possible, it also makes sense to monitor prices well before you fly. In fact, some airlines publicize their prices up to 12 months before the departure date. Expedia is continuously updating the biggest airfare bargains around, so check back often and be ready to grab your seat when the price is low. ## Explore a world of travel with Expedia - Flights ### Flights - [Flights from Hanoi to Kingston Upon Thames](https://www.expedia.ca/lp/flights/1428/4380/hanoi-to-kingston-upon-thames) - [Flights from Atlanta to West London](https://www.expedia.ca/lp/flights/178232/6047457/atlanta-to-west-london) - [Flights from Atlanta to North London](https://www.expedia.ca/lp/flights/178232/6196832/atlanta-to-north-london) - [Flights from Auckland to Windsor](https://www.expedia.ca/lp/flights/178233/5479/auckland-to-windsor) - [Flights from Indianapolis to Windsor](https://www.expedia.ca/lp/flights/178266/5479/indianapolis-to-windsor) - [Flights from Sydney to Windsor](https://www.expedia.ca/lp/flights/178312/5479/sydney-to-windsor) - [Flights from Vancouver to Kingston Upon Thames](https://www.expedia.ca/lp/flights/178315/4380/vancouver-to-kingston-upon-thames) - 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