
Popular airlines from Chicago to London (LHR-Heathrow)
- British Airways
British Airways
- Aer Lingus
Aer Lingus
- Iberia
Iberia
- Austrian Airlines
Austrian Airlines
- Brussels Airlines
Brussels Airlines
- Finnair
Finnair
- Air Canada
Air Canada
- Plan, book, fly with confidence
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Today's featured flight deals from Chicago to London (LHR-Heathrow)
- Chicago (ORD) to London (LHR).British Airways, nonstop.Departing on Thu, Aug 28 at 7:10pm from Chicago, arriving on Fri, Aug 29 at 9:05am in London.Returning on Mon, Sep 1 at 6:10pm from London, arriving on Tue, Sep 2 at 3:45pm in Chicago.Select British Airways flight departing on Thu, Aug 28 at 7:10pm from Chicago, returning on Mon, Sep 1 at 6:10pm from London priced at $87435% less than typical$874
- Chicago (ORD) to London (LHR).British Airways, nonstop.Departing on Thu, Aug 28 at 7:10pm from Chicago, arriving on Fri, Aug 29 at 9:05am in London.Returning on Mon, Sep 1 at 12:45pm from London, arriving on Tue, Sep 2 at 3:45pm in Chicago.Select British Airways flight departing on Thu, Aug 28 at 7:10pm from Chicago, returning on Mon, Sep 1 at 12:45pm from London priced at $87435% less than typical$874
- Chicago (ORD) to London (LHR).American Airlines, nonstop.Departing on Wed, Sep 3 at 10:35pm from Chicago, arriving on Thu, Sep 4 at 12:15pm in London.Returning on Wed, Sep 17 at 8:00pm from London, arriving on Thu, Sep 18 at 2:15pm in Chicago.Select American Airlines flight departing on Wed, Sep 3 at 10:35pm from Chicago, returning on Wed, Sep 17 at 8:00pm from London priced at $51340% less than typical$513
- Chicago (ORD) to London (LHR).American Airlines, nonstop.Departing on Thu, Sep 4 at 10:35pm from Chicago, arriving on Fri, Sep 5 at 12:15pm in London.Returning on Thu, Sep 11 at 8:20am from London, arriving at 3:45pm in Chicago.Select American Airlines flight departing on Thu, Sep 4 at 10:35pm from Chicago, returning on Thu, Sep 11 at 8:20am from London priced at $54340% less than typical$543
- Chicago (ORD) to London (LHR).American Airlines, nonstop.Departing on Thu, Sep 4 at 8:40pm from Chicago, arriving on Fri, Sep 5 at 10:30am in London.Returning on Thu, Sep 11 at 8:20am from London, arriving at 3:45pm in Chicago.Select American Airlines flight departing on Thu, Sep 4 at 8:40pm from Chicago, returning on Thu, Sep 11 at 8:20am from London priced at $54340% less than typical$543
- Chicago (ORD) to London (LHR).United, nonstop.Departing on Thu, Aug 28 at 9:45pm from Chicago, arriving on Fri, Aug 29 at 11:45am in London.Returning on Thu, Sep 4 at 8:30am from London, arriving at 2:55pm in Chicago.Select United flight departing on Thu, Aug 28 at 9:45pm from Chicago, returning on Thu, Sep 4 at 8:30am from London priced at $94425% less than typical$944
- Chicago (ORD) to London (LHR).British Airways, nonstop.Departing on Mon, Sep 8 at 4:55pm from Chicago, arriving on Tue, Sep 9 at 6:50am in London.Returning on Sun, Sep 14 at 9:15am from London, arriving at 3:38pm in Chicago.Select British Airways flight departing on Mon, Sep 8 at 4:55pm from Chicago, returning on Sun, Sep 14 at 9:15am from London priced at $58435% less than typical$584
- Chicago (ORD) to London (LHR).British Airways, nonstop.Departing on Sun, Sep 7 at 7:15pm from Chicago, arriving on Mon, Sep 8 at 9:10am in London.Returning on Thu, Sep 18 at 9:15am from London, arriving at 11:50am in Chicago.Select British Airways flight departing on Sun, Sep 7 at 7:15pm from Chicago, returning on Thu, Sep 18 at 9:15am from London priced at $52440% less than typical$524
- Chicago (ORD) to London (LHR).British Airways, nonstop.Departing on Fri, Sep 5 at 7:15pm from Chicago, arriving on Sat, Sep 6 at 9:10am in London.Returning on Tue, Sep 9 at 10:40am from London, arriving at 7:41pm in Chicago.Select British Airways flight departing on Fri, Sep 5 at 7:15pm from Chicago, returning on Tue, Sep 9 at 10:40am from London priced at $62830% less than typical$628
Cheap Flights from Chicago to London (CHI-LHR)
Prices were available within the past 7 days and start at $238 for one-way flights and $400 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.










Find the cheapest month to fly from Chicago (CHI) to London (LHR)
November is typically the cheapest month to fly
Graph displaying average flight prices per month
Alternative airports near London
Prices were available within the past 7 days. Prices and availability are subject to change.
Origin airport | O'Hare Intl. |
Destination airport | Heathrow |
Roundtrip price | $400 |
Distance | 3942 mi |
Chicago to London Flights
The cheapest times to fly from Chicago to London
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to London are during the month of November. You can find some of the cheapest flights from Chicago to London with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Chicago to London
Sunday is one of the best days to book for cheap flights from Chicago to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Chicago to London
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $238 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
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