LHR - CHI

$518 Find Cheap Flights from London Heathrow Airport to Chicago - 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 Heathrow to Chicago departing on 1/22. 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 round-trip
$664
Typical prices: $577-$831
Icelandair
Wed 9/9Sat 9/12
LHR - ORD • 1 stop
Cheapest non-stop
$706
Typical prices: $748-$1,061
British Airways
Sat 10/3Sat 10/10
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 adds priority boarding, bigger bags, and 7 inches more legroom.
Iberia Premium Economy and United Premium Plus both offer extra legroom on this long-haul route.
Expert advice
Expert advice
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Top airlines
Cheapest • from $664 (round-trip)
Best reviews • 7.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with American Airlines, British Airways and United Airlines. Average duration is 8h 53m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest
Most popular
Insights
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Avoid delays
Most punctual • 94% on-time
Best time • Fewest delays
Insights
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Top layover airports
Cheapest • Avg $639 (round-trip)
Shortest trip • 11h 38m (one-way)
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 19% compared to booking last minute.
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When to travel
Cheapest • 25% price drop
Most popular
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Flight Deals

Cheap Flights from Heathrow to Chicago (LHR-CHI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Heathrow to Chicago 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 Heathrow to Chicago

Wed, Sep 9 - Sat, Sep 12
Icelandair Logo
1:05 pm - 9:25 pm
LHR
-
ORD
14h 20m
1 stop
Icelandair Logo
7:25 pm - 11:55 am
ORD
-
LHR
10h 30m
1 stop
$664Icelandair
Wed, Sep 23 - Mon, Sep 28
Icelandair Logo
9:25 pm - 6:15 pm
LHR
-
ORD
26h 50m
1 stop
Icelandair Logo
7:25 pm - 11:55 am
ORD
-
LHR
10h 30m
1 stop
$665Icelandair
Wed, Oct 7 - Sun, Oct 11
Multiple Airlines Logo
10:20 am - 9:25 pm
LHR
-
ORD
17h 05m
2 stops
Multiple Airlines Logo
10:25 pm - 9:40 pm
ORD
-
LHR
17h 15m
2 stops
$667Multiple Airlines
Thu, Dec 17 - Fri, Jan 1
TAP AIR PORTUGAL Logo
6:30 pm - 3:30 pm
LHR
-
ORD
27h 00m
1 stop
TAP AIR PORTUGAL Logo
8:10 pm - 5:30 pm
ORD
-
LHR
15h 20m
1 stop
$669TAP AIR PORTUGAL
Sat, Sep 5 - Sat, Sep 19
Lufthansa Logo
2:05 pm - 7:51 am
LHR
-
ORD
23h 46m
1 stop
Lufthansa Logo
4:25 pm - 6:45 am
ORD
-
LHR
8h 20mnonstop
$669Lufthansa
Sat, Aug 29 - Mon, Sep 7
Lufthansa Logo
2:05 pm - 10:19 am
LHR
-
ORD
26h 14m
1 stop
Lufthansa Logo
2:31 pm - 7:15 am
ORD
-
LHR
10h 44m
1 stop
$672Lufthansa
Tue, Nov 3 - Tue, Nov 3
Austrian Airlines Logo
7:40 am - 10:45 am
LHR
-
ORD
9h 05mnonstop
Austrian Airlines Logo
1:14 pm - 10:50 am
ORD
-
LHR
15h 36m
1 stop
$680Austrian Airlines
Wed, Oct 28 - Fri, Oct 30
Austrian Airlines Logo
4:20 pm - 6:51 pm
LHR
-
ORD
31h 31m
1 stop
Austrian Airlines Logo
5:20 pm - 9:40 pm
ORD
-
LHR
23h 20m
1 stop
$693Austrian Airlines
Wed, Sep 9 - Sun, Sep 20
Scandinavian Airlines Logo
7:05 am - 4:10 pm
LHR
-
ORD
15h 05m
2 stops
Scandinavian Airlines Logo
7:15 pm - 4:25 pm
ORD
-
LHR
15h 10m
2 stops
$699Scandinavian Airlines
Wed, Sep 9 - Sun, Sep 20
Scandinavian Airlines Logo
6:40 am - 4:10 pm
LHR
-
ORD
15h 30m
1 stop
Scandinavian Airlines Logo
7:15 pm - 4:25 pm
ORD
-
LHR
15h 10m
2 stops
$701Scandinavian Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Chicago flights

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

How much is a round-trip flight from London Heathrow Airport to Chicago?

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 Heathrow Airport to Chicago departing in September.

Flight prices are below average for this route right now.

Flights to Chicago from London Heathrow Airport usually cost between $754 and $1,130 in September.
The lowest price found in the past 5 days was $664 on Icelandair (Sep 9-Sep 12).

What is the cheapest London Heathrow Airport to Chicago flight route?

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

The cheapest return flight from London Heathrow Airport to Chicago costs $625 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 Heathrow Airport to Chicago?

The average price of all round-trip flights from London Heathrow Airport to Chicago 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 Thursday and more expensive on a Saturday. On your return trip to London Heathrow Airport, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from London Heathrow Airport to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Chicago, 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 Heathrow Airport to Chicago is February, where tickets cost $615 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $1,036 and $949 respectively.

Can I save money by flying with a layover from London Heathrow Airport to Chicago?

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.

No, with an average price for the route of $1,180, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from London Heathrow Airport to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Chicago, 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 Heathrow Airport to Chicago, you should book around 4 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Expert advice

Expert advice for your flight from Heathrow to Chicago

 
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
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.

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.

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.

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.

Good to know

Low season

January

Cheapest flight

$518
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from London Heathrow Airport to Chicago O'Hare Airport

When to book flights from Heathrow to Chicago

Are your dates flexible? Find out the best times to travel from Heathrow to Chicago 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 Heathrow to Chicago: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Heathrow to Chicago 
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 Heathrow Airport to Chicago flights

  • What is the cheapest flight from London Heathrow Airport to Chicago?

    In the last 5 days, the lowest price for a flight from London Heathrow Airport to Chicago was $518 for a one-way ticket and $664 for a round-trip.

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

    Yes, you’ll need a passport to travel to Chicago from London Heathrow Airport.

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

    Air France, KLM, and American Airlines offer inflight Wi-Fi service on the London Heathrow Airport to Chicago flight route.

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

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

  • Which airline alliances offer flights from London Heathrow Airport to Chicago?

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

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

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

  • Which is the best airline for flights from London to Chicago, Icelandair or British Airways?

    The two airlines most popular with KAYAK users for flights from London to Chicago are Icelandair and British Airways. With an average price for the route of $731 and an overall rating of 7.0, Icelandair is the most popular choice. British Airways is also a great choice for the route, with an average price of $920 and an overall rating of 6.7.

  • How does KAYAK find such low prices on flights from London Heathrow Airport 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 Heathrow Airport to Chicago.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport with another airline.

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $741 or less one-way and $863 or less round-trip.

Prefer to fly direct from London Heathrow Airport to Chicago?

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

Direct departures

London Heathrow to Chicago

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 to London Heathrow

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 Heathrow to Chicago

 
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 Heathrow to Chicago? 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.
7.0
IcelandairOverall score based on 716 reviews
6.9Comfort
8.0Crew
6.1Food
7.2Boarding
6.9Entertainment
Airline reviews

1. No food on a 8 hr flight is a travesty! The fare was not that low. 2. The entertainment was pretty bad and you had to buy headphones!!! 3. Only 2 toilets for the whole Economy section!!

4.0 OkayAnonymous, Jul 2026
LGW - KEF
Read more Icelandair reviews

1. No food on a 8 hr flight is a travesty! The fare was not that low. 2. The entertainment was pretty bad and you had to buy headphones!!! 3. Only 2 toilets for the whole Economy section!!

At least one soda free, felt like I was nickeled to death.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

did internet check in but still had to get checked in at the counter and this was not the first time. Bummer!

We had to be bussed to the plane. And it was raining. Not a pleasant experience.

Paying $75 for my bag is disgusting. Got off ground late so I missed my connections. Kept us waiting for passengers in the cold. Will not use them again.

I will never want to book with these people. They are arrogant and rude. Food was really really bad, crew was even worst

Check-in experience, for business call please provide a premium experience

Everything. Employees offered to help me because I had to use a cane.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

The seat pads are past there sell by date now and are uncomfotable. Also, with screens in the back of the seat, the seats shouldnt be able to recline as this puts rhe screen in your face.

As I have said it sucked, the ticket counter to have to find and pay for another airline to get home. Now I understand this happened over the weekend but they should have someone there to talk to us instead of throwing the regular crew under the bus.

Not so good with their baggage handling as they damaged one of my check in luggage

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

The whole experience was very disappointing. Drinks could have been served and offered more frequently. The seats were reasonable but considering I paid for premium economy, I felt cheated. I flew premium economy with Japanese Airlines ANA 5 years ago and their service was by far, superior. We had access to the club lounge, better seats and excellent service. Out of 10, I would rate the experience as 4. Everything felt cheap and the Airbus aircraft are far better and more comfortable

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

Information on your arrival and departure airports