ORD - LHR

C$ 484 Find Cheap Flights from Chicago to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Heathrow departing on 15/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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

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

Cheapest round-trip
C$ 717
Overall average: C$ 975
Icelandair
Tue 17/3Tue 24/3
ORD - LHR • 1 stop
Cheapest direct flights
C$ 885
Typical prices: C$ 909-C$ 1,053
Finnair
Sun 15/2Tue 24/2
ORD - LHR • Direct
Our travellers' advice
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Security lines at O'Hare can be long; arrive early.
Expect long walks at Heathrow; consider a wheelchair.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Icelandair
Cheapest • from C$ 717 (round-trip)
British Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 17% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Chicago to Heathrow (ORD-LHR)

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

Tue, 17 Mar - Tue, 24 Mar
Icelandair Logo
7:30 p.m. - 10:50 a.m.
ORD
-
LHR
10h 20m
1 stop
Icelandair Logo
8:35 p.m. - 6:20 p.m.
LHR
-
ORD
26h 45m
1 stop
C$ 717Icelandair
Tue, 7 Apr - Thu, 16 Apr
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
1:05 p.m. - 6:15 p.m.
LHR
-
ORD
11h 10m
1 stop
C$ 736Icelandair
Sat, 4 Apr - Mon, 13 Apr
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
9:25 p.m. - 6:15 p.m.
LHR
-
ORD
26h 50m
1 stop
C$ 738Icelandair
Sat, 25 Apr - Mon, 4 May
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
9:25 p.m. - 6:15 p.m.
LHR
-
ORD
26h 50m
1 stop
C$ 749Icelandair
Sat, 2 May - Mon, 11 May
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
1:05 p.m. - 6:15 p.m.
LHR
-
ORD
11h 10m
1 stop
C$ 757Icelandair
Thu, 30 Apr - Sat, 9 May
Icelandair Logo
7:25 p.m. - 8:20 p.m.
ORD
-
LHR
18h 55m
1 stop
Icelandair Logo
9:25 p.m. - 6:15 p.m.
LHR
-
ORD
26h 50m
1 stop
C$ 760Icelandair
Sun, 5 Apr - Tue, 14 Apr
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
1:05 p.m. - 6:15 p.m.
LHR
-
ORD
11h 10m
1 stop
C$ 771Icelandair
Sun, 5 Apr - Mon, 13 Apr
Icelandair Logo
7:25 p.m. - 11:55 a.m.
ORD
-
LHR
10h 30m
1 stop
Icelandair Logo
9:25 p.m. - 6:15 p.m.
LHR
-
ORD
26h 50m
1 stop
C$ 773Icelandair
Sun, 8 Mar - Wed, 11 Mar
Scandinavian Airlines Logo
8:20 p.m. - 7:55 p.m.
ORD
-
LHR
42h 35m
2 stops
Scandinavian Airlines Logo
10:20 a.m. - 5:45 p.m.
LHR
-
ORD
12h 25m
1 stop
C$ 787Scandinavian Airlines
Sun, 8 Mar - Wed, 11 Mar
Scandinavian Airlines Logo
8:20 p.m. - 7:55 p.m.
ORD
-
LHR
42h 35m
2 stops
Scandinavian Airlines Logo
7:05 a.m. - 5:45 p.m.
LHR
-
ORD
15h 40m
2 stops
C$ 791Scandinavian Airlines
Booking Insights

KAYAK's insights & trends for Chicago to Heathrow flights

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

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

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

For Chicago to London, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London back to Chicago, the best deals are generally found on Saturday, with Tuesday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to London Heathrow 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 Chicago O'Hare Intl Airport to London Heathrow Airport is January, where tickets cost C$ 883 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 1,707 and C$ 1,279 respectively.

Can I save money by flying with a layover from Chicago O'Hare Intl Airport to London Heathrow 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 C$ 855 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to London Heathrow 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 Chicago O'Hare Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Find deals
Expert advice

Expert advice for your flight from Chicago to Heathrow

 
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
Stefanie Waldek

Stefanie Waldek

Expert on ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Duncan Madden

Duncan Madden

Expert on 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.

Read more

Good to know

Low seasonJanuary
Cheapest flightC$ 484
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly and prices are also 12% lower on average.
Flight from Chicago to London

When to book flights from Chicago to Heathrow

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

Insights shared by verified travellers who flew the route from Chicago to Heathrow 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British AirwaysJun 2025
Get a wheel chair if you have difficulty walking
JoeFlew with IberiaApr 2025
Get there early. Nice airport options while you wait.
Verified travelerFlew with IberiaMay 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 AirlinesJan 2025
Anticipate delays, prepare for long walks through Heathrow to baggage claim or for connections.
KariFlew with British AirwaysMay 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 AirlinesDec 2023
Find a flight where you are allowed to choose your seats before the day of boarding for anything international.

FAQs for booking Chicago to London flights

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

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to London Heathrow Airport was C$ 484 for a one-way ticket and C$ 717 for a round-trip.

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

    All the following airlines offer inflight Wi-Fi service on the Chicago to London flight route: British Airways, Iberia, Finnair, American Airlines, Alaska Airlines, SWISS, and United Airlines.

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

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Chicago to London flight route.

  • Which airline alliances offer flights from Chicago to London?

    oneworld is the only airline alliance operating flights between Chicago and London.

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

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

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

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London.

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

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

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

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

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

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Chicago to London?

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

Direct departures

Chicago O'Hare Intl 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 nonstop flights

Direct returns

London Heathrow 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 nonstop flights

Reviews of the top airline flying from Chicago to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Chicago to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to Heathrow? 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.
6.7
British AirwaysOverall score based on 7706 reviews
6.4Food
7.6Crew
6.9Boarding
6.8Comfort
6.4Entertainment
Airline reviews

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

2.0 MediocreAnonymous, Jan 2026
LAX - LHR
Read more British Airways reviews

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

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

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

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

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

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

Information on your arrival and departure airports

Chicago (ORD)
Heathrow (LHR)