Title: CA $545 Cheap American Airlines fights from Chicago to London - 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 $545 Cheap American Airlines fights from Chicago (CHI) to London (LON) [View CA $545 flight on Sun, Mar 22, 2026](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:ORD,to:LHR,departure:22/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:544.55&airProductToken=AQpoCjIIwYIBEgQyMTg0GK4cIMGTASjQqogDMNuriAM4QkAAWAFqBUJBU0lDcghTTFgwRDRCVgoyCMGCARIDMTA4GMGTASDriQEoiqyIAzCkr4gDOEJAAVgBagVCQVNJQ3IIU0xYMEQ0QlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) - [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 - ![](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 30% 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.ca/login) ## American Airlines flights from Chicago to London (CHI→LON) Prices were available within the past 7 days and start at CA $545 for one-way flights and CA $894 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Mar 11 - Wed, Mar 18 ORD Chicago LHR London CA $894 Roundtrip found 7 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ORD,to:LHR,departure:11/03/2026TANYT&leg2=from:LHR,to:ORD,departure:18/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:893.35&airProductToken=AQpyCjAIwYIBEgM4ODIYrhwg4FwomrCHAzCZsYcDOEJAAFgBagVCQVNJQ3IIT0xYNEQxQlYKPgjBggESBDY5NzcY4Fwg64kBKN6xhwMww7WHAzhPQAFYAWoFQkFTSUNyCE9MWDREMUJWegoIwoIBEgQ2OTc3CjIKMAjBggESAjg3GOuJASCuHCjT-YcDMOX9hwM4QkAAWAFqBUJBU0lDcghPTFg0RDFCVhIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Sun, Mar 8 - Sun, Mar 15 ORD Chicago LGW London CA $926 Roundtrip found 11 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ORD,to:LGW,departure:08/03/2026TANYT&leg2=from:LGW,to:ORD,departure:15/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:925.45&airProductToken=AQpzCjEIwYIBEgQxODkxGK4cIPMDKLiMhwMw142HAzhCQABYAWoFQkFTSUNyCE9MWDREMUJWCj4IwYIBEgQ3MDE0GPMDIMuxASjejocDMNyShwM4T0ABWAFqBUJBU0lDcghPTFg0RDFCVnoKCMKCARIENzAxNAqmAQo-CMGCARIENzAxNRjLsQEg8wMo7teHAzDG3IcDOE9AAFgBagVCQVNJQ3IIT0xXNEQxQlZ6CgjCggESBDcwMTUKMQjBggESBDMyNzAY8wMgjAIoo92HAzDz3YcDOEJAAVgBagVCQVNJQ3IIT0xXNEQxQlYKMQjBggESBDE2MjQYjAIgrhwoi-KHAzDh44cDOEJAAVgBagVCQVNJQ3IIT0xXNEQxQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Sun, Mar 8 - Sun, Mar 15 ORD Chicago LGW London CA $1,018 Roundtrip found 11 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ORD,to:LGW,departure:08/03/2026TANYT&leg2=from:LGW,to:ORD,departure:15/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1017.45&airProductToken=AQpzCjEIwYIBEgQxNTU2GK4cIMxwKNyIhwMw_4mHAzhCQABYAWoFQkFTSUNyCE5MWDBDMUJWCj4IwYIBEgQ3MDExGMxwIMuxASiOjocDMIKShwM4TkABWAFqBUJBU0lDcghOTFgwQzFCVnoKCMKCARIENzAxMQqmAQo-CMGCARIENzAxNRjLsQEg8wMo7teHAzDG3IcDOE9AAFgBagVCQVNJQ3IIT0xXNEQxQlZ6CgjCggESBDcwMTUKMQjBggESBDMyNzAY8wMgjAIoo92HAzDz3YcDOEJAAVgBagVCQVNJQ3IIT0xXNEQxQlYKMQjBggESBDE2MjQYjAIgrhwoi-KHAzDh44cDOEJAAVgBagVCQVNJQ3IIT0xXNEQxQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ## Find the cheapest month to fly from Chicago (CHI) to London (LON) ### November is typically the cheapest month to fly From CA $634 - CA $1,090 per traveller. __Flight from Chicago to London (ORD - LHR) route information__ | Origin airport | O'Hare Intl. | | ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Heathrow | | Airlines serving | Aer Lingus, Air Canada, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, LOT-Polish Airlines, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic | | Popular airline | Aer Lingus | | Distance | 6307 km | \*Available to Expedia members.