£172 Find Cheap Flights from Chicago to the United Kingdom – 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 the United Kingdom departing on 25/11. 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.
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1 adult, Economy, 0 bags

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Cheap Flights from Chicago to the United Kingdom

Cheapest return prices found by our users on KAYAK in the last 72 hours
Manchester
Manchester1 stop£479
Birmingham
Birmingham1 stop£323
Leeds
Leeds3 stops£606
Lerwick
Lerwick2 stops£872
Manchester
Manchester1 stop£479
Birmingham
Birmingham1 stop£323
Leeds
Leeds3 stops£606
Lerwick
Lerwick2 stops£872

Book Cheap Chicago to the United Kingdom Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Chicago to the United Kingdom 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 the United Kingdom

Sun, 23 Aug - Sat, 29 Aug
Icelandair Logo
19:25 - 13:40
ORD
-
GLA
12h 15m
1 stop
Icelandair Logo
14:20 - 18:15
GLA
-
ORD
33h 55m
1 stop
£453Icelandair
Wed, 9 Sep - Sun, 20 Sep
Multiple Airlines Logo
22:25 - 13:25
ORD
-
GLA
9h 00m
1 stop
Multiple Airlines Logo
21:45 - 22:59
GLA
-
ORD
31h 14m
2 stops
£471Multiple Airlines
Sun, 13 Sep - Wed, 30 Sep
Multiple Airlines Logo
19:25 - 11:40
ORD
-
MAN
10h 15m
1 stop
Multiple Airlines Logo
16:00 - 17:50
MAN
-
ORD
31h 50m
2 stops
£479Multiple Airlines
Sat, 7 Nov - Sun, 15 Nov
Icelandair Logo
18:30 - 09:55
ORD
-
GLA
9h 25m
1 stop
Icelandair Logo
11:55 - 17:20
GLA
-
ORD
11h 25m
1 stop
£485Icelandair
Wed, 4 Nov - Fri, 6 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
£536United Airlines
Wed, 4 Nov - Fri, 6 Nov
United Airlines Logo
07:05 - 07:10
ORD
-
LHR
18h 05m
1 stop
United Airlines Logo
06:50 - 12:10
LHR
-
ORD
11h 20m
1 stop
£539United 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
£556JetBlue
Tue, 8 Dec - Sun, 13 Dec
British Airways Logo
17:10 - 06:55
ORD
-
LHR
7h 45mdirect
British Airways Logo
15:40 - 18:45
LHR
-
ORD
9h 05mdirect
£557British Airways
Thu, 14 Jan - Sat, 23 Jan
British Airways Logo
21:50 - 11:35
ORD
-
LHR
7h 45mdirect
British Airways Logo
15:40 - 18:45
LHR
-
ORD
9h 05mdirect
£591British Airways
Thu, 13 Aug - Sat, 5 Sep
JetBlue Logo
11:01 - 06:30
ORD
-
LHR
13h 29m
1 stop
JetBlue Logo
08:15 - 16:18
LHR
-
ORD
14h 03m
1 stop
£612JetBlue
Booking Insights

KAYAK's insights & trends for Chicago to the United Kingdom flights

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

What is the cheapest Chicago to the United Kingdom flight route?

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

The cheapest ticket to the United Kingdom from Chicago found in the last 5 days was to London, at £688 return. The most popular route is from Chicago O'Hare Intl Airport (ORD) to London Heathrow Airport (LHR), and the cheapest return airline ticket found on this route in the last 5 days was £688.

What is the cheapest time of day to fly to the United Kingdom?

The average price for all round-trip flights from Chicago to the United Kingdom depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to the United Kingdom is generally at night, when retur flights cost £690 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is £778.

Can I save money by flying with a stopover from Chicago to the United Kingdom?

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.

No, with an average price for the route of £739, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Chicago to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago to the United Kingdom, 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 to the United Kingdom is January, when tickets cost £482 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is £1,001 and £808 respectively.

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

The average price of all round-trip flights from Chicago to the United Kingdom clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to United Kingdom on a Monday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Chicago to United Kingdom. For your return ticket, we recommend flying on a Thursday and avoiding Sundays for the best deals.

How far in advance should I book a flight from Chicago to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago to the United Kingdom, 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 to the United Kingdom, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 1 week before departure.

Good to know - Cheap tickets from Chicago to the United Kingdom

Low season

January

Cheapest flight

£172
Best time to beat the crowds (27% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from Chicago to Glasgow

Flights from Chicago to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Chicago to the United Kingdom 
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 - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Chicago to the United Kingdom?

    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 the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Chicago to the United Kingdom 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 the United Kingdom?

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

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

    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 from Chicago to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Chicago to the United Kingdom

 
Need help choosing which airline to fly with from Chicago to the United Kingdom? 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.
7.3
Aer LingusOverall score based on 1683 reviews
6.7Food
7.0Entertainment
8.1Crew
7.4Boarding
7.2Comfort
Airline reviews

OK overall. Flight was delayed Crew on flight was good

6.0 GoodAnonymous, Apr 2026
ORD - SFO
Read more Aer Lingus reviews

OK overall. Flight was delayed Crew on flight was good

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

I flew economy class. Seats were very good and the crew was excellent

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

I appteciate the very courteous staff. The flight was good. Something that wasn't good was that my bag was only checked as far as Dublin and I had a connecting flight to Vienna. (That was a mistake the ORD desk made.) Fortunately the desk at DUB was able to re-tag without me having to re-check in (which initially it seemed I might have to do.)

It was excellent! The plane left Chicago early. Arrived in Dublin early. The crew was excellent! It was a great experience.

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

Horrible. Garbage airline. Due to the strike we got a replacement plane/crew. I didn't get my exit row seat I paid for. Food was horrible. Plane was hot and didn't have AC vents.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

Our flight was cancelled while we are on our way to the airport. So, no notice. We were rescheduled to another airline with a 2 hour later takeoff and so arrived at our destination on time. We pre-paid American Airlines $190 to upgrade our seats. No refund. So no use for AA or Kayak.

Terrible, horrible, disappointing- without telling us they changed planes and moved and separated our seats to opposite sides - said they changed seats putting us together - got to airport to find no, they did not - we sat opposing sides of plane - food overly salty to inedible, never saw stewardess but once - it was terrible

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

It was good, the staff was friendly and it was a typical flight to Europe.

First leg of the flight was delayed by 2 1/2 hours with very little communication. We scrambled trying to talk to airline people at the airport about our connecting flight and received all different answers and no help. We ended up at our destination almost five hours when we were supposed to arrive. We ended up missing an afternoon that was already paid for due to the delays.

Flight left 2 hours late as it had to wait for luggage from American to be loaded. This cause me to miss my flight to Athens. The USB ports were broken so by the time I arrived in London my phone was out of battery.

Our 9:00 pm flight was cancelled on our way too the airport!!! No reason was given too us!!! So stressful!!! I couldn’t believe it!!! Thank goodness we arrived 6 hours ahead of time. We were able too get on an earlier flight. Than everything was great!!

I DO NOT recommend Iceland air...missed connecting flight.....paid for isle seat upgrade for health reasons...had to do that over....baggage left in the rain so clothes got soaked other items ruined....called customer * dont care* service

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

Damage May baggage and I report the airport agant and they see it

Crew was very friendly. Need lay flat beds! More snacks

Screen didn't work, and neither did the button to tilt the seat even though the seat was comfortable

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

Our three ski bags did not arrive and are still not delivered, one full day later. With one ski bag not traceable at all. I would not fly Iceland Air again.

Great crew, bumpy landings, two-hour wait for baggage with no communication or explanation. Will not fly again!

Decent service - nice seats. Crew were not overly attentive but can’t complain overall for the money

It was okay. Mothers with rowdy children should be invited to sit in front of them.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

I have flown with many airlines. My first time was several years ago. Now I remember why I avoided them for so long. Lufthanza is the only airline who has ever raised a size/weight issue with my modest standard size carry on. I had to repack three times to meet their carry-on weight criteria. (Apparently the rules of physics apply differently on Lufthansa flight than on other airlines.) In the meantime their staff was quite rude, repeating meaningless phrases like "Rules are Rules." And ignoring the additional fact that weight is also weight, whether it is in found in your carry on or in your suitcase. They eventually acknowledged that customer service and satisfaction is, for them, a low priority. Never choosing Lufthansa again.

Comfortable seats, good service overall. The food could’ve been a little bit better. The boarding process was slightly chaotic and in fairness, not all of that is related to the performance of British Airways.

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.

Everything you need to know for your flight from Chicago to the United Kingdom

Cabin class types available on flights to the United Kingdom

Cabin classes available on flights to the United Kingdom. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.