LHR - CHI

$472 Find Cheap Flights from London Heathrow Airport 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 Heathrow to Chicago departing on 3/16. 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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chicago.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chicago.
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Everything you should know

Cheapest round-trip
$530
Typical prices: $569-$796
Scandinavian Airlines
Thu 2/26Mon 3/2
LHR - ORD • 2 stops
Cheapest non-stop
$643
Typical prices: $601-$959
Finnair
Fri 3/13Tue 3/17
LHR - ORD • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
British Airways' premium economy offers more legroom.
Heathrow's security is strict; pack liquids carefully.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Scandinavian Airlines
Cheapest • from $530 (round-trip)
Austrian Airlines
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
LHR
-
ORD
Cheapest
LHR
-
ORD
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 18% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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We hope you love your trip to Chicago!
Flight Deals
Booking Insights
Expert advice
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

Thu, Feb 26 - Mon, Mar 2
Scandinavian Airlines Logo
7:05 am - 4:45 pm
LHR
-
ORD
15h 40m
2 stops
Scandinavian Airlines Logo
7:20 pm - 4:25 pm
ORD
-
LHR
15h 05m
2 stops
$530Scandinavian Airlines
Sat, Apr 18 - Tue, Apr 21
Icelandair Logo
1:05 pm - 6:15 pm
LHR
-
ORD
11h 10m
1 stop
Icelandair Logo
7:25 pm - 11:55 am
ORD
-
LHR
10h 30m
1 stop
$531Icelandair
Mon, Mar 2 - Mon, Mar 16
Scandinavian Airlines Logo
10:20 am - 4:45 pm
LHR
-
ORD
12h 25m
1 stop
Scandinavian Airlines Logo
8:20 pm - 4:00 pm
ORD
-
LHR
14h 40m
1 stop
$532Scandinavian Airlines
Fri, Feb 13 - Mon, Feb 16
Scandinavian Airlines Logo
7:30 pm - 4:45 pm
LHR
-
ORD
27h 15m
1 stop
Scandinavian Airlines Logo
7:20 pm - 4:00 pm
ORD
-
LHR
14h 40m
1 stop
$533Scandinavian Airlines
Tue, Mar 3 - Wed, Mar 11
Virgin Atlantic Logo
10:45 am - 5:45 pm
LHR
-
MDW
13h 00m
1 stop
Virgin Atlantic Logo
6:07 pm - 11:40 am
MDW
-
LHR
12h 33m
1 stop
$702Virgin Atlantic
Wed, Mar 4 - Tue, Mar 31
Delta Logo
8:40 am - 6:40 pm
LHR
-
MDW
16h 00m
2 stops
Delta Logo
1:10 pm - 7:10 am
MDW
-
LHR
12h 00m
1 stop
$716Delta
Mon, Mar 2 - Tue, Mar 10
Delta Logo
8:40 am - 6:40 pm
LHR
-
MDW
16h 00m
2 stops
Delta Logo
12:47 pm - 6:25 am
MDW
-
LHR
12h 38m
1 stop
$719Delta
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
11:05 am - 6:40 pm
LHR
-
MDW
12h 35m
1 stop
Multiple Airlines Logo
2:05 pm - 7:05 am
MDW
-
LHR
12h 00m
1 stop
$735Multiple Airlines
Mon, Mar 2 - Mon, Mar 16
Virgin Atlantic Logo
8:55 am - 5:45 pm
LHR
-
MDW
14h 50m
1 stop
Virgin Atlantic Logo
10:45 am - 6:25 am
MDW
-
LHR
14h 40m
1 stop
$736Virgin Atlantic
Tue, Mar 17 - Mon, Mar 30
KLM Logo
11:05 am - 6:40 pm
LHR
-
MDW
12h 35m
1 stop
KLM Logo
12:47 pm - 6:25 am
MDW
-
LHR
11h 38m
1 stop
$748KLM
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.

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 $572 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 Wednesday and more expensive on a Monday. 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 $587 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $867 and $809 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.

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 $703 on average.

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 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 18 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
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.

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$472
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 21% increase in price.
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 3 days, the lowest price for a flight from London Heathrow Airport to Chicago was $472 for a one-way ticket and $530 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?

    American Airlines, Air France, KLM, Delta, and Virgin Atlantic 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?

    Star Alliance, and oneworld are the airline alliances operating flights between London Heathrow Airport and Chicago, with Star Alliance 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, Austrian Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from London to Chicago are Austrian Airlines and American Airlines. With an average price for the route of $749 and an overall rating of 7.5, Austrian Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $895 and an overall rating of 7.2.

  • 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 $635 or less one-way and $653 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

Aer Lingus, American Airlines, British Airways, +1 more

Aer Lingus, American Airlines, +2 more

Saturday

Aer Lingus, American Airlines, British Airways, +1 more

Aer Lingus, American Airlines, +2 more

Sunday

Aer Lingus, American Airlines, British Airways, +1 more

Aer Lingus, American Airlines, +2 more

See more direct flights

Reviews of the top 5 airlines serving 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.
7.5
Austrian AirlinesOverall score based on 896 reviews
7.3Comfort
7.6Boarding
6.8Entertainment
8.1Crew
6.8Food
Airline reviews

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

2.0 MediocreNate, Jan 2026
GSP - IAD
Read more Austrian Airlines reviews

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

Excellent flight. The crew was exceptionally attentive and organized. Attention to details is unmatched.

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

Very limited legroom in a 10 hour flight.very old plane.

They had me unpack a handbag 2 lbs overweight into another handbag 8 lbs underweight for a Bible.

Accessibility serious problems in Viena airport making it seriousely difficult in in-between gates and boarding travel. Pretens of breakfast and service care in the economy pathetic.

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices.

Flight from CHI to PVD was delayed by over 20 hours.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

Little warm on the plane and delayed for an hour

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

Flight, food and crew were all good, friendly and very satisfactory.

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

Staff's did their best to make everyone comfortable and I appreciate them for it

One of the best flight experiences I've have had in along time. Would fly with them again.

Like getting a bus. No great luxury but will get you there

Got us to destination alive, albeit a bit late. Luggage was left behind. No live tracking app available (available on some other airlines). Supposedly going to be delivered in next couple of days.

So, the trip from Dublin to LA did not really happen because the flight took off before we could finish the transfer.

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

The connection time between the regional flight (from Newcastle) to an international flight (to The States) was too short. To require as second security scan and customs clearance within an hour and 20 mins is not enough time to make the actual connection. We had a final boarding call the minute we walked out of US customs and had to sprint (with two small children) through 20 gates to make it in time before the door closed. The concept is great in theory to clear customs before leaving Europe, but the timing needs to be adjusted. We travel abroad frequently and won’t be using this route again. Thanks.

Like - the crew were nice Dislike - sitting on the tarmac for long periods after boarding and landing.

I was not admitted to the flight!!! i need a refund for this.

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

Overall satisfied and would fly with them again. They could improve the check-in efficiency at BOS, we got backed up because it seemed there were passengers requiring much more time for check in.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

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.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

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

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

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

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

My seat cushion was poor. The cushion was compressed and was uncomfortable for such a long flight.

I was in a bulkhead seat and my tray table wasn't level. Eating was difficult.

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

Information on your arrival and departure airports