ORD - LON

£277 Find Cheap Flights from Chicago to London

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 11/5. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to London, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£435
Typical prices: £686-£779
Icelandair
Sun 19/4Sun 10/5
ORD - LGW • 1 stop
Cheapest direct flights
£513
Typical prices: £480-£570
Finnair
Sun 5/4Wed 15/4
ORD - LHR • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Finnair's Economy Comfort offers more legroom for a fee.
Expect long walks at Heathrow to baggage claim.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
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Top airlines
Cheapest • from £435 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with American Airlines, British Airways, and United Airlines. Average duration is 8h 00m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
Insights
Insights
Insights
Avoid delays
Most punctual • 75% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £366 (return)
Shortest trip • 10h 15m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to London!
Flight Deals
Booking Insights
Expert advice
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

Sun, 19 Apr - Sun, 10 May
Icelandair Logo
22:25 - 14:40
ORD
-
LGW
10h 15m
1 stop
Icelandair Logo
15:40 - 21:25
LGW
-
ORD
11h 45m
1 stop
£435Icelandair
Tue, 28 Apr - Sat, 9 May
Icelandair Logo
19:25 - 14:40
ORD
-
LGW
13h 15m
1 stop
Icelandair Logo
15:40 - 18:15
LGW
-
ORD
32h 35m
1 stop
£435Icelandair
Mon, 20 Apr - Fri, 24 Apr
Scandinavian Airlines Logo
19:15 - 16:00
ORD
-
LHR
14h 45m
1 stop
Scandinavian Airlines Logo
06:40 - 16:10
LHR
-
ORD
15h 30m
1 stop
£437Scandinavian Airlines
Thu, 30 Apr - Tue, 5 May
Multiple Airlines Logo
19:25 - 22:35
ORD
-
STN
21h 10m
2 stops
Multiple Airlines Logo
07:15 - 18:15
STN
-
ORD
17h 00m
2 stops
£437Multiple Airlines
Mon, 20 Apr - Tue, 28 Apr
Multiple Airlines Logo
19:15 - 22:50
ORD
-
LTN
21h 35m
2 stops
Multiple Airlines Logo
16:10 - 16:10
LTN
-
ORD
30h 00m
2 stops
£438Multiple Airlines
Sun, 3 May - Tue, 19 May
Icelandair Logo
19:25 - 11:55
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
21:25 - 21:25
LHR
-
ORD
30h 00m
1 stop
£438Icelandair
Sun, 12 Apr - Sat, 18 Apr
TAP AIR PORTUGAL Logo
18:00 - 12:45
ORD
-
LHR
12h 45m
1 stop
TAP AIR PORTUGAL Logo
08:00 - 16:05
LHR
-
ORD
14h 05m
1 stop
£441TAP AIR PORTUGAL
Sat, 11 Apr - Sat, 18 Apr
TAP AIR PORTUGAL Logo
18:05 - 10:20
ORD
-
LHR
34h 15m
1 stop
TAP AIR PORTUGAL Logo
06:00 - 16:05
LHR
-
ORD
16h 05m
1 stop
£443TAP AIR PORTUGAL
Tue, 14 Apr - Thu, 23 Apr
SWISS Logo
19:05 - 12:35
ORD
-
LCY
11h 30m
1 stop
SWISS Logo
09:15 - 15:55
LCY
-
ORD
12h 40m
1 stop
£539SWISS
Mon, 17 Aug - Tue, 25 Aug
SWISS Logo
14:20 - 08:40
ORD
-
LCY
12h 20m
1 stop
SWISS Logo
09:15 - 15:55
LCY
-
ORD
12h 40m
1 stop
£547SWISS
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.

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 £491 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 Sundays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from London, Wednesday 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 February, where tickets cost £448 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £897 and £711 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 £604 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 3 weeks 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.

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.

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.

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 seasonJanuary
Cheapest flight£277
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly and prices are also 3% 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
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 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to London was £277 for a one-way ticket and £435 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, and American Airlines 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 British Airways?

    The two airlines most popular with KAYAK users for flights from Chicago to London are United Airlines and British Airways. With an average price for the route of £683 and an overall rating of 7.4, United Airlines is the most popular choice. British Airways is also a great choice for the route, with an average price of £537 and an overall rating of 6.7.

  • 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 £301 or less one-way and £533 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 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 9428 reviews
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
7.7Boarding
Airline reviews

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

4.0 OkayDr. Joseph, Feb 2026
ORD - IAH
Read more United Airlines reviews

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

We were delayed for about an hour from taking off due to traffic control procedures at the destination airport. But once in the air, the flight went well. The crew members were great and provided cabin service despite moderate turbulence during much of the flight.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Not being stranded in Chicago for her airport to 11:30 tomorrow morning the 3rd

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

I understand weather is an issue, but making us chase our plane down at five scheduled gates across three terminals in an airport the size of O'Hare was unfair. They'd have probably been better off to leave gates as TBD until the inbound plane is in final approach instead of running us all over the place. Also, props to the consistently-unprepared ground crew in Richmond for once again leaving my lane parked short of the gate because they couldn't have a crew in place on time with 2 hours notice...

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

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

Information on your arrival and departure airports