LON - ORD

$516 Find Cheap Flights from London to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to O'Hare Intl departing on 6/23. 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 Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chicago, 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 London to Chicago, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$693
Typical prices: $528-$472
Icelandair
Tue 9/1Tue 9/8
LGW - ORD • 1 stop
Cheapest non-stop
$806
Typical prices: $1,014-$747
British Airways
Wed 6/17Wed 7/1
LHR - ORD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
BA Premium Economy offers 7 inches extra legroom.
Heathrow's B gate area is quiet with food options.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Cheapest • from $693 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines, British Airways and United Airlines. Average duration is 8h 51m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
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Avoid delays
Most punctual • 95% on-time
Best time • Fewest delays
Insights
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Top layover airports
Cheapest • Avg $525 (round-trip)
Shortest trip • 11h 39m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 24% compared to booking last minute.
Insights
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When to travel
Cheapest • 90% price drop
Most popular
Good to know
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We hope you love your trip to O'Hare Intl!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from London to O'Hare Intl (LON-ORD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to O'Hare Intl 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 round-trip flight deals from London to O'Hare Intl

Tue, Sep 1 - Tue, Sep 8
Icelandair Logo
1:00 pm - 6:15 pm
LGW
-
ORD
11h 15m
1 stop
Icelandair Logo
7:25 pm - 2:40 pm
ORD
-
LGW
13h 15m
1 stop
$693Icelandair
Tue, Sep 1 - Tue, Sep 8
Icelandair Logo
1:05 pm - 9:25 pm
LHR
-
ORD
14h 20m
1 stop
Icelandair Logo
7:25 pm - 8:20 pm
ORD
-
LHR
18h 55m
1 stop
$693Icelandair
Tue, Sep 1 - Tue, Sep 8
Icelandair Logo
1:00 pm - 9:25 pm
LGW
-
ORD
14h 25m
1 stop
Icelandair Logo
10:25 pm - 2:40 pm
ORD
-
LGW
10h 15m
1 stop
$696Icelandair
Tue, Sep 22 - Tue, Sep 29
Icelandair Logo
1:05 pm - 6:15 pm
LHR
-
ORD
11h 10m
1 stop
Icelandair Logo
7:25 pm - 8:20 pm
ORD
-
LHR
18h 55m
1 stop
$696Icelandair
Fri, Jun 5 - Sun, Jun 14
Multiple Airlines Logo
4:25 pm - 6:15 pm
LGW
-
ORD
31h 50m
2 stops
Multiple Airlines Logo
7:25 pm - 8:30 am
ORD
-
LGW
31h 05m
3 stops
$698Multiple Airlines
Fri, Jun 5 - Sun, Jun 14
Multiple Airlines Logo
6:30 pm - 6:15 pm
LGW
-
ORD
29h 45m
2 stops
Multiple Airlines Logo
7:25 pm - 8:30 am
ORD
-
LGW
31h 05m
3 stops
$701Multiple Airlines
Wed, Jun 17 - Wed, Jul 1
JetBlue Logo
8:15 am - 5:22 pm
LHR
-
ORD
15h 07m
1 stop
JetBlue Logo
10:56 am - 6:30 am
ORD
-
LHR
13h 34m
1 stop
$705JetBlue
Wed, Aug 19 - Sun, Aug 23
TAP AIR PORTUGAL Logo
8:00 am - 4:00 pm
LHR
-
ORD
14h 00m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 12:45 pm
ORD
-
LHR
12h 45m
1 stop
$706TAP AIR PORTUGAL
Mon, Sep 21 - Mon, Oct 19
SWISS Logo
9:15 am - 3:55 pm
LCY
-
ORD
12h 40m
1 stop
SWISS Logo
7:05 pm - 12:35 pm
ORD
-
LCY
11h 30m
1 stop
$789SWISS
Tue, Sep 1 - Mon, Sep 14
SWISS Logo
9:15 am - 3:55 pm
LCY
-
ORD
12h 40m
1 stop
SWISS Logo
7:05 pm - 12:35 pm
ORD
-
LCY
11h 30m
1 stop
$792SWISS
Booking Insights

KAYAK's insights & trends for London to O'Hare Intl flights

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

How much is a round-trip flight from London to Chicago O'Hare Intl Airport?

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

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

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

The cheapest return flight from London to Chicago O'Hare Intl Airport costs $776 on the route between London Heathrow Airport (LHR) and Chicago O'Hare Intl Airport (ORD). It is also the most popular route.

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

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

Your flight ticket price will generally be cheaper if you fly to Chicago on a Friday and more expensive on a Saturday. On your return trip to London, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Chicago O'Hare Intl Airport, 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 London to Chicago O'Hare Intl Airport is March, where tickets cost $78 (return) on average. On the other hand, the most expensive months are December and October, where the average cost of round-trip tickets is $1,568 and $1,264 respectively.

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

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $863 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to Chicago O'Hare Intl Airport, 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 London to Chicago O'Hare Intl Airport, you should book around 2 weeks before departure, which saves you about 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Expert advice

Expert advice for your flight from London to O'Hare Intl

 
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
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, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Duncan Madden

Duncan Madden

Expert on British Airways and LHR

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 United Airlines and 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 on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonJanuary
Cheapest flight$517
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from London Gatwick Airport to Chicago

When to book flights from London to O'Hare Intl

Are your dates flexible? Find out the best times to travel from London to O'Hare Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 London to O'Hare Intl: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from London to O'Hare Intl 
Verified travelerFlew with British Airways
LHR
-
ORD
Jun 2025
I wish I'd known that there were food and shopping opportunities at the B gate area. This was a lovely, NOT busy place to spend time. I'd have gone directly there if I'd known. Definitely a nice place to wait.
Verified travelerFlew with British Airways
LHR
-
ORD
Apr 2025
Make sure to allow ample time between connecting flights. I have to hoof it when I realized that TSA required bags to be picked up and rechecked.
MichaelFlew with British Airways
LHR
-
ORD
Apr 2025
Have a light luggage as much as you can. Boarding gate walk is not a joke.
Verified travelerFlew with British Airways
LHR
-
ORD
Jul 2024
Gate 10 is a train wreck because there are multiple gates distinguished by a letter following A10. If possible get there as quickly as possible to find the appropriate gate.
EmilyFlew with British Airways
LHR
-
ORD
Mar 2024
Bring as few liquids as possible or put them in checked bag. They are very strict at Heathrow about all of them fitting into one small ziplock bag

FAQs for booking London to Chicago flights

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

    In the last 3 days, the lowest price for a flight from London to Chicago O'Hare Intl Airport was $517 for a one-way ticket and $693 for a round-trip.

  • Do I need a passport to fly between London and Chicago?

    A passport is required to fly from London to Chicago.

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

    On your way to Chicago, you’ll fly out from one of these London airports: London City, London Gatwick, London Heathrow, London Luton, or London Stansted. You’ll be landing at Chicago O'Hare Intl.

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

    Only American Airlines offers inflight Wi-Fi service on the London to Chicago flight route.

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

    The Boeing 767-300 is the aircraft model that flies most regularly on the London to Chicago flight route.

  • Which airline alliances offer flights from London to Chicago?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from London to Chicago are United Airlines and American Airlines. With an average price for the route of $663 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $815 and an overall rating of 7.1.

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

    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 London to Chicago.

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

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

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

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

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

    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 Chicago from London 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 London to Chicago O'Hare Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $718 or less one-way and $921 or less round-trip.

Prefer to fly direct from London to Chicago?

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

Direct departures

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

Direct returns

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

Reviews of the top 4 airlines serving from London to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from London to Chicago. 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 London to O'Hare Intl? 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 9683 reviews
8.1Crew
7.3Comfort
6.6Food
7.1Entertainment
7.7Boarding
Airline reviews

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

8.0 ExcellentAnonymous, Apr 2026
ZRH - ORD
Read more United Airlines reviews

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

The new planes (American Eagle) are beautiful and especially comfortable. The flight attendants are consistently professional and courteous. And, while it may seem inconsequential, the new liquid tube of coffee creamer—in contrast to the powdered coffee creamer—makes all the difference in a cup of coffee.

I'm not sure American is capable of on-time arrivals and departures. When you land at ORD, you almost always get held on the tarmac because your gate is still occupied. I may have missed my connection, but that ended up up being significantly delayed as well. Once again, I finally got home well after midnight.

Didn't make it back on American Airlines due to a maintenance issue. The communication and updates were terrible. I ended up returning on Aero Mexico which had a much nicer aircraft with a large entertainment screen with movies and shows AND they had a nice inflight meal. That was a treat after being delayed 26 hours! I think some additional flight miles, or something should be offered for that long of a delay ---it was not pleasant at all---very physical and emotional experience.

Crew at the gate was very crabby and not at all polite. The plane was very hot the entire flight. And the seat cushion was very worn out.

The staff are very, very professional. It's what flying should feel like.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

Delays with no explanation. It could have been handled better.

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

Was a bit surprised that Icelandair flies a domestically configured 757s on long-haul flights to Iceland (no lie-flat seats in business class).

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

The most uncomfortable seat i’ve ever had on a flight

Waiting area on top of stairs before Boarding the bus wasn’t great. Took a long time to load the bus to gate.

The real reason why the flying experience with Icelandair ---was mediocre was because of not being able to enter DC airspace yesterday evening. This obviously was out of your control and do realize this is a safety issue. I did notice---that everything was being done to get us to Washington Dulles and we did arrive at Dulles SAFELY with just a 4 hour delay. Thank you!

Iceland Air severely damaged a checked bag. Additionally, the gate agent caused issues for many passengers who had standard-sized onboard bags that would have passed inspection by any other airline.

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

OK, except for a cabin attendant's lack of attention.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

Everything you need to know for your flight from London to O'Hare Intl

Information on your arrival and departure airports