$238 Cheap Flights from Chicago (ORD) to London (LHR)

View $238 flight on Fri, Aug 8, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)

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Cheap Flights from Chicago to London (ORD-LHR)

Prices were available within the past 7 days and start at $238 for one-way flights and $473 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun, Nov 23 - Mon, Dec 1
ORD
Chicago
LHR
London
$473 Roundtrip, found 11 hours ago
$473
Roundtrip
found 11 hours ago
Select Icelandair flight, departing Sun, Nov 23 from Chicago to London, returning Mon, Dec 1, priced at $473 found 11 hours ago
TAP Portugal
Sun, Mar 15 - Wed, Mar 25
ORD
Chicago
LHR
London
$505 Roundtrip, found 2 days ago
$505
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Sun, Mar 15 from Chicago to London, returning Wed, Mar 25, priced at $505 found 2 days ago
United
Tue, Jul 29 - Tue, Aug 19
ORD
Chicago
LHR
London
$511 Roundtrip, just found
$511
Roundtrip
just found
Select United flight, departing Tue, Jul 29 from Chicago to London, returning Tue, Aug 19, priced at $511 just found
Air Canada
Wed, Mar 25 - Wed, Apr 8
ORD
Chicago
LHR
London
$522 Roundtrip, found 6 days ago
$522
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Mar 25 from Chicago to London, returning Wed, Apr 8, priced at $522 found 6 days ago
Iberia
Sun, Mar 15 - Wed, Mar 25
ORD
Chicago
LHR
London
$522 Roundtrip, found 2 days ago
$522
Roundtrip
found 2 days ago
Select Iberia flight, departing Sun, Mar 15 from Chicago to London, returning Wed, Mar 25, priced at $522 found 2 days ago
British Airways
Sun, Mar 15 - Wed, Mar 25
ORD
Chicago
LHR
London
$522 Roundtrip, found 2 days ago
$522
Roundtrip
found 2 days ago
Select British Airways flight, departing Sun, Mar 15 from Chicago to London, returning Wed, Mar 25, priced at $522 found 2 days ago
American Airlines
Tue, Aug 5 - Thu, Aug 14
ORD
Chicago
LHR
London
$529 Roundtrip, found 7 hours ago
$529
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Tue, Aug 5 from Chicago to London, returning Thu, Aug 14, priced at $529 found 7 hours ago
Austrian Airlines
Wed, Mar 25 - Wed, Apr 8
ORD
Chicago
LHR
London
$534 Roundtrip, found 6 days ago
$534
Roundtrip
found 6 days ago
Select Austrian Airlines flight, departing Wed, Mar 25 from Chicago to London, returning Wed, Apr 8, priced at $534 found 6 days ago
Lufthansa
Sun, Mar 15 - Wed, Mar 25
ORD
Chicago
LHR
London
$535 Roundtrip, found 2 days ago
$535
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Sun, Mar 15 from Chicago to London, returning Wed, Mar 25, priced at $535 found 2 days ago
Virgin Atlantic
Tue, Jul 29 - Tue, Aug 19
ORD
Chicago
LHR
London
$538 Roundtrip, just found
$538
Roundtrip
just found
Select Virgin Atlantic flight, departing Tue, Jul 29 from Chicago to London, returning Tue, Aug 19, priced at $538 just found

Find the cheapest month to fly from Chicago (ORD) to London (LHR)

November is typically the cheapest month to fly

From $496 - $725 per traveler.

Graph displaying average flight prices per month

0
Flights from Chicago (ORD) to London (LHR)
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, KLM, LOT-Polish Airlines, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$473
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.

 

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) cost?
Cheap return flights from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) start from $643. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a British Airways flight leaving ORD on July 23 2025 and touching down at LHR. The price was last updated on June 28 2025 and has not changed since.
What is the cheapest month to fly from ORD to LHR?
The cheapest flights from ORD to LHR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Take your pick of 3 airlines that operate direct flights from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR). Including:

  • United Airlines
  • American Airlines
  • British Airways

What is the cheapest airline that flies from ORD to LHR?
At the moment, the cheapest carrier offering one-way flights from ORD to LHR is British Airways. You can jet off on this route from $380. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ORD on September 1 2025. Prices were last updated on June 28 2025 and have not changed since.
How many flights per day from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Every day, an average of 5 nonstop flights take off from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR). Choose the departure time that works for you.
What are the most popular departure times for flights from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
More travelers fly between ORD and LHR at 5 PM than at any other time. Prefer a quieter experience? Consider flying outside peak hours and you could save on your fare as well.
What day of the week has the most flights from ORD to LHR?
If you travel on a Sunday, you'll get the widest range of choices for flights from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR).
What is the earliest flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
O'Hare Intl. Airport (ORD)'s earliest flight to Heathrow Airport (LHR) is at approximately 5:00PM UTC-6. With a travel duration of 7h 50m, you'll arrive at around 6:50AM UTC+0.
How long does it take to fly from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
The average flight duration from ORD to LHR is 7 hours and 52 minutes, covering a total distance of 3,900 mi.
What airline has the least delays from ORD to LHR?
Consider booking with Lufthansa if you'd like to fly straight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) without any delays. This carrier has the best track record for punctuality, with an on-time performance of 81%. Want to be notified if anything changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Choose a flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for London from O'Hare Intl. Airport (ORD)?
Heathrow Airport (LHR) is the only airport in London with direct flights from O'Hare Intl. Airport (ORD). Explore your options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) last-minute?
Booking your ticket from ORD to LHR right before your journey is usually more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book an ORD to LHR flight and hotel package?
Compared with arranging hotels and flights separately, booking an ORD to LHR flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Usually, it's possible to reschedule or cancel your ORD to LHR flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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