ORD - LON

£228 Find Cheap Flights from Chicago to London – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to London departing on 16/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£524
Typical prices: £435-£658
Icelandair
Thu 29/10Tue 10/11
ORD - LHR • 1 stop
Cheapest direct flights
£598
Typical prices: £478-£597
British Airways
Thu 14/1Sat 23/1
ORD - LHR • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Lufthansa Premium Economy adds 50% more space and an extra checked bag.
BA and Iberia Premium Economy add legroom; Finnair Economy Comfort costs less.
Expert advice
Expert advice
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Expert advice
Expert advice
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Top airlines
Cheapest • from £524 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Direct flights
You can fly direct with American Airlines, British Airways, and United Airlines. Average duration is 7h 59m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest
Most popular
Insights
Insights
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Insights
Avoid delays
Most punctual • 76% on-time
Best time • Fewest delays
Insights
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Top stopover airports
Cheapest • Avg £489 (return)
Shortest trip • 10h 25m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
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Flight Deals

Cheap Flights from Chicago to London (ORD-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Chicago to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Chicago to London

Thu, 29 Oct - Tue, 10 Nov
Icelandair Logo
19:30 - 10:50
ORD
-
LHR
10h 20m
1 stop
Icelandair Logo
12:15 - 17:20
LHR
-
ORD
11h 05m
1 stop
£524Icelandair
Sun, 23 Aug - Wed, 9 Sep
Multiple Airlines Logo
19:25 - 22:20
ORD
-
LTN
20h 55m
2 stops
Multiple Airlines Logo
08:00 - 12:40
LTN
-
ORD
34h 40m
2 stops
£524Multiple Airlines
Sat, 10 Oct - Sun, 18 Oct
Icelandair Logo
19:25 - 14:35
ORD
-
LGW
13h 10m
1 stop
Icelandair Logo
15:40 - 21:25
LGW
-
ORD
11h 45m
1 stop
£524Icelandair
Wed, 9 Sep - Wed, 16 Sep
Multiple Airlines Logo
22:25 - 22:15
ORD
-
LTN
17h 50m
2 stops
Multiple Airlines Logo
08:00 - 12:40
LTN
-
ORD
34h 40m
2 stops
£524Multiple Airlines
Tue, 3 Nov - Thu, 5 Nov
United Airlines Logo
21:50 - 12:00
ORD
-
LHR
8h 10mdirect
United Airlines Logo
06:50 - 12:10
LHR
-
ORD
11h 20m
1 stop
£543United Airlines
Tue, 3 Nov - Thu, 5 Nov
United Airlines Logo
13:55 - 07:10
ORD
-
LHR
11h 15m
1 stop
United Airlines Logo
06:50 - 12:10
LHR
-
ORD
11h 20m
1 stop
£545United Airlines
Wed, 7 Oct - Thu, 8 Oct
JetBlue Logo
09:39 - 06:30
ORD
-
LHR
14h 51m
1 stop
JetBlue Logo
08:40 - 19:22
LHR
-
ORD
16h 42m
1 stop
£563JetBlue
Sun, 15 Nov - Thu, 26 Nov
Aer Lingus Logo
15:55 - 08:05
ORD
-
LHR
10h 10m
1 stop
Aer Lingus Logo
09:50 - 19:41
LHR
-
ORD
15h 51m
2 stops
£584Aer Lingus
Wed, 4 Nov - Thu, 12 Nov
Aer Lingus Logo
15:55 - 08:05
ORD
-
LHR
10h 10m
1 stop
Aer Lingus Logo
09:50 - 19:41
LHR
-
ORD
15h 51m
2 stops
£584Aer Lingus
Fri, 4 Sep - Mon, 7 Sep
JetBlue Logo
20:20 - 06:30
ORD
-
LHR
28h 10m
1 stop
JetBlue Logo
08:40 - 19:25
LHR
-
ORD
16h 45m
1 stop
£648JetBlue
Booking Insights

KAYAK’s insights & trends for Chicago to London flights

Get data-powered insights and trends into flights from Chicago to London to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Chicago O'Hare Intl Airport to London?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Chicago O'Hare Intl Airport to London departing in August.

Flight prices are typical for this route right now.

Flights to London from Chicago O'Hare Intl Airport usually cost between £492 and £718 in August.
The lowest price found in the past 5 days was £524 on Multiple Airlines (23 Aug–9 Sept).

What is the cheapest Chicago O'Hare Intl Airport to London flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Chicago O'Hare Intl Airport to London costs £697 on the route between Chicago O'Hare Intl Airport (ORD) and London Heathrow Airport (LHR). It is also the most popular route.

What’s the cheapest day of the week to fly from Chicago to London?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to London clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Chicago to London, look for departures on Mondays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from London, Thursday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago O'Hare Intl Airport to London is January, where tickets cost £478 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,036 and £830 respectively.

Can I save money by flying with a stopover from Chicago O'Hare Intl Airport to London?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £523 on average.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chicago O'Hare Intl Airport to London, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 1 week before departure.

Expert advice

Expert advice for your flight from Chicago to London

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has travelled to more than 50 countries across six continents.

Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Stefanie Waldek

Stefanie Waldek

Expert on ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or out at sea, likely en route to Antarctica or the Arctic.

Kirstie Pickering

Kirstie Pickering

Expert on LHR

Aviation and business journalist Kirstie didn’t leave England until she was 18 years old, but has since travelled to over 20 countries including Japan, Canada, and Iceland. Her travel expertise lies in European city breaks, including how to find the best locally-owned hotels and restaurants and how to optimise the airport experience for your needs.

Good to know - Cheap tickets from Chicago to London

Low season

January

Cheapest flight

£228
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly and prices are also 10% lower on average.
Flight from Chicago to London Heathrow Airport

When to book flights from Chicago to London

Are your dates flexible? Find out the best times to travel from Chicago to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Chicago to London: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Chicago to London 
Verified travelerFlew with British Airways
ORD
-
LHR
Mar 2026
Take early morning flights to adjust to weather-related delays.
Verified travelerFlew with British Airways
ORD
-
LHR
Jun 2025
Get a wheel chair if you have difficulty walking
JoeFlew with Iberia
ORD
-
LHR
Apr 2025
Get there early. Nice airport options while you wait.
Verified travelerFlew with Iberia
ORD
-
LHR
May 2025
Get to the airport early so you’re relaxed. Con yourself into believing it’s bedtime and try to sleep so that you can keep going all day when you get there. If you can afford more comfy seats it might be worth it - though I always have the cheap ones so I can’t say for sure. Try very hard not to. sit in the middle. I’m small and the guy next to me played games all night and didn’t care that he continually ( with every move) jabbed me with his arm. This was my first flight with Cheap Flights and it was far less convenient than other times I’ve flown overseas.
DinaFlew with United Airlines
ORD
-
LHR
Jan 2025
Anticipate delays, prepare for long walks through Heathrow to baggage claim or for connections.
KariFlew with British Airways
ORD
-
LHR
May 2024
Always check to confirm your assistance is in system. No wheelchair waiting for me in London. Had no clue about airport or how to get around. Got lost easy
AaronFlew with American Airlines
ORD
-
LHR
Dec 2023
Find a flight where you are allowed to choose your seats before the day of boarding for anything international.

FAQs for booking Chicago to London flights

  • What is the cheapest flight from Chicago O'Hare Intl Airport to London?

    In the last 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to London was £228 for a one-way ticket and £524 for a return.

  • Which airports will I be using when flying from Chicago to London?

    When flying out of Chicago you will be using Chicago O'Hare Intl. You will be landing at one of these airports: London City, London Gatwick, London Heathrow, London Luton, or London Stansted.

  • Which airlines offer Wi-Fi service onboard planes from Chicago to London?

    Iberia, British Airways, Finnair, American Airlines, and Air France offer inflight Wi-Fi service on the Chicago to London flight route.

  • Which aircraft models fly most regularly from Chicago to London?

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Chicago to London flight route.

  • Which airline alliances offer flights from Chicago to London?

    Star Alliance, and oneworld are the airline alliances operating flights between Chicago and London, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Chicago to London?

    There are direct flights from Chicago to London on a daily basis.

  • Which is the best airline for flights from Chicago to London, United Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights from Chicago to London are United Airlines and Iberia. With an average price for the route of £793 and an overall rating of 7.4, United Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of £785 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Chicago to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Chicago is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Chicago with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago O'Hare Intl Airport to London

  • Looking for a cheap flight from London to Chicago? 25% of our users found flights on this route for £281 or less one-way and £818 or less round-trip.

Prefer to fly direct from Chicago to London?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Chicago O'Hare Intl to London.
Find which airlines fly direct from Chicago O'Hare Intl Airport to London, which days they fly and book direct flights.

Direct departures

Chicago O'Hare Intl to London

Monday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Tuesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Wednesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Thursday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Friday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Saturday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Sunday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

See more direct flights

Direct returns

London to Chicago O'Hare Intl

Monday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Tuesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Wednesday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Thursday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Friday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Saturday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

Sunday

American Airlines,British Airways,United Airlines

American Airlines,British Airways, +1 more

See more direct flights

Reviews of the top 3 airlines flying from Chicago to London

 
See real verified KAYAK customer reviews for airlines flying from Chicago to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10052 reviews
7.7Boarding
8.1Crew
7.3Comfort
6.6Food
7.1Entertainment
Airline reviews

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

8.0 ExcellentArmedrest, Jul 2026
ORD - PAH
Read more United Airlines reviews

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

The SFO lounge closes at 12 midnight. My flight took off at 2AM

It was extremely hot in the cabin the entire flight, vent air was worn

Have not had a flight out or returning to Norfolk that has not required maintenance, and a gate delay. Properly staff the crew so maintenance can be performed without last minute emergencies on each flight and there is enough staff to have gates prepared for inbound flights. Staff to ensure the safety and on time service vs. profit.

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.

Horrible! I paid for a straight flight from Chicago to London. A week before trip it changed and now I had a connecting flight. Our flight was delayed an hour and a half because our flight crew was still flying in from CA. Forty passengers ran from one plane to the next. The next United Airlines flight was delayed two to three hours because of mechanical difficulties. They had to ready another plane which took time. I missed my scheduled excursion in London. 😢

Flight delayed for 2 hours due to a part. The plane sat waiting for boarding for a long time and during final preflight inspection the issue was found. Why not do the preflight inspection sooner if you know the plane is being used?

All good, useful to have the united app from check in to boarding

The flight was clean and on time, the crew were all very nice and we got the seats we booked. Plenty of food and beverages. The seats are too close so it’s very difficult to try and sleep comfortably.

The staff was very nice and helpful. Some of the best crew I have met.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

It was a wonderful experience with great food, great staff, and no difficulties boarding!

Paid for my seat 4 months ago. Did not pay the extra for specific seat assignment ( never have and never was a problem). Could not electronically check in (found out it was due to overbooking and that unassigned seats get bumped first - never happened to me before). Luckily, did make the flight. Very stressful - would have been extremely disruptive for my travel plans. UK Visa - never notified by Kayak or BA that a visa was required. Had to spend 15 minutes to download and complete app at the flight counter and pay $25, and was told they would let me know in 3 days if I would get it (flight landing in 10 hours from when I completed app). Luckily, visa was approved before landing. Unnecessary stress created here. Food - main meal, curry chicken barely palatable with unrecognizable vegetable. Desert cup, cheesecake, also barely palatable. Salad cup was good. Small water offered only 3 times (before main meal, at main meal, at morning snack) - not nearly enough for long flight.

Paid for “extra room” selected seat. Wasn’t a benefit. Also was in aisle and was bumped almost every time attendants walked down aisle. Should have saved the assigned seat money and let them select.

I bought the ticket through Iberian, but I was unable to check in using my code. American wouldn’t let me check in and Iberian counter was closed.

They gave away my business class seat. No explanation and no apology. Told me I had to take the downgrade if I wanted to get to India. Then no WiFi for 10 hours. Just ridiculous. We should not work with this company at Deloitte. They don’t know how to run a business.

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

The seats are extra cramped if you are taller than 5’8! Spring for the extra legroom seats for sure if you have a long flight!

Very disappointed with British Airways. It has been over 24 hours and I still have not received my checked baggage or any proper update. Customer support has been unresponsive, making the situation even more frustrating. Poor baggage handling and lack of communication seriously impacted my travel experience.

Cancelled flight and re booked seats were a downgrade. British Airways said the upgrade was t available but when I checked it was but then they wouldn’t make it right

Overall ok. Best part has always been the sundae dessert.

Very good staff members with sincere passion and responsibility in their job.

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

More Indian vegetarian food options would have been better Availability of seat selection free of charge 72 hours before departure would be great

Everything you need to know for your flight from Chicago to London

Information on your arrival and departure airports