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

View $238 flight on Sun, Sep 21, 2025Opens in a new window

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

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Today's featured flight deals from Chicago O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)

Nonstop
Carry-on included
Lower price than typical

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 $400 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Wed, Mar 11 - Fri, Mar 20
ORD
Chicago
LHR
London
$400 Roundtrip, found 4 hours ago
$400
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Wed, Mar 11 from Chicago to London, returning Fri, Mar 20, priced at $400 found 4 hours ago
Iberia
Mon, Aug 25 - Wed, Nov 19
ORD
Chicago
LHR
London
$401 Roundtrip, found 4 days ago
$401
Roundtrip
found 4 days ago
Select Iberia flight, departing Mon, Aug 25 from Chicago to London, returning Wed, Nov 19, priced at $401 found 4 days ago
United
Wed, Dec 10 - Thu, Dec 18
ORD
Chicago
LHR
London
$406 Roundtrip, found 12 hours ago
$406
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Dec 10 from Chicago to London, returning Thu, Dec 18, priced at $406 found 12 hours ago
Delta
Wed, Dec 10 - Thu, Dec 18
ORD
Chicago
LHR
London
$416 Roundtrip, found 12 hours ago
$416
Roundtrip
found 12 hours ago
Select Delta flight, departing Wed, Dec 10 from Chicago to London, returning Thu, Dec 18, priced at $416 found 12 hours ago
Virgin Atlantic
Wed, Dec 10 - Thu, Dec 18
ORD
Chicago
LHR
London
$443 Roundtrip, found 12 hours ago
$443
Roundtrip
found 12 hours ago
Select Virgin Atlantic flight, departing Wed, Dec 10 from Chicago to London, returning Thu, Dec 18, priced at $443 found 12 hours ago
Air Canada
Thu, Nov 6 - Tue, Nov 18
ORD
Chicago
LHR
London
$452 Roundtrip, found 20 hours ago
$452
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Thu, Nov 6 from Chicago to London, returning Tue, Nov 18, priced at $452 found 20 hours ago
American Airlines
Fri, Oct 17 - Thu, Oct 23
ORD
Chicago
LHR
London
$452 Roundtrip, just found
$452
Roundtrip
just found
Select American Airlines flight, departing Fri, Oct 17 from Chicago to London, returning Thu, Oct 23, priced at $452 just found
Swiss International Air Lines
Thu, Dec 11 - Tue, Dec 16
ORD
Chicago
LHR
London
$453 Roundtrip, found 12 hours ago
$453
Roundtrip
found 12 hours ago
Select Swiss International Air Lines flight, departing Thu, Dec 11 from Chicago to London, returning Tue, Dec 16, priced at $453 found 12 hours ago
British Airways
Fri, Oct 17 - Thu, Oct 23
ORD
Chicago
LHR
London
$456 Roundtrip, just found
$456
Roundtrip
just found
Select British Airways flight, departing Fri, Oct 17 from Chicago to London, returning Thu, Oct 23, priced at $456 just found
TAP Portugal
Wed, Mar 11 - Fri, Mar 20
ORD
Chicago
LHR
London
$459 Roundtrip, found 4 hours ago
$459
Roundtrip
found 4 hours ago
Select TAP Portugal flight, departing Wed, Mar 11 from Chicago to London, returning Fri, Mar 20, priced at $459 found 4 hours ago

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

November is typically the cheapest month to fly

From $462 - $742 per traveler.

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.

Select flight to Gatwick LGW. Cheapest option available. Average driving time to city center is 52 minutes. Flights from $532
LGW
Gatwick
Cheapest
Average driving time to city center52 min
Flights from $532
Select flight to London City LCY. Closest option available. Average driving time to city center is 21 minutes. Flights from $743
LCY
London City
Closest
Average driving time to city center21 min
Flights from $743
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
$400
Distance
3942 mi
Average flight time
13 hours 58 mins

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 March. 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?
Get a cheap one-way flight from $238 or cheap return flight from $400 from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
Traveling in March is a great way to save, as it's the cheapest month for flights between ORD and LHR. You'll usually find the lowest fares during the off-season.
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 O'Hare Intl. Airport (ORD) to Heathrow Airport (LHR)?
While prices can vary depending on your travel dates, British Airways and American Airlines are popular choices for flights between O'Hare Intl. Airport (ORD) and Heathrow Airport (LHR). You can also compare airlines on Expedia and use the "Sort by" filter to find the cheapest ticket for your ORD to LHR flight.
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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*Available to One Key members.