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Heathrow

$313+ Cheap flights from Chicago (CHI) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Aug 2 — Aug 91
Sun 8/2
Sun 8/9
1 adult, Economy
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Find cheap flights from Chicago to Heathrow with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Chicago to London Heathrow are usually found in February or January, booked 33 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Chicago to Heathrow

Cheapest flights from Chicago to Heathrow
Explore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2026.

This FlightHub deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:15 pm
ORD
-
LHR
1 stop16h 25m
Scandinavian Airlines
Sun 10/189:05 pm
LHR
-
ORD
2 stops25h 05m
Scandinavian Airlines
Deal found 7/1$865
This Mytrip deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:45 pm
ORD
-
LHR
1 stop10h 20m
Aer Lingus
Wed 8/191:25 pm
LHR
-
ORD
1 stop11h 50m
Aer Lingus
Deal found 7/2$866
This Virgin Atlantic deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:35 am
MDW
-
LHR
1 stop19h 05m
Virgin Atlantic
Wed 11/186:30 am
LHR
-
MDW
2 stops15h 55m
Virgin Atlantic
Deal found 7/1$866
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:25 pm
ORD
-
LHR
Nonstop8h 20m
United Airlines
Tue 9/296:50 am
LHR
-
ORD
1 stop11h 10m
United Airlines
Deal found 7/1$868
This Finnair deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:50 pm
ORD
-
LHR
Nonstop8h 00m
Finnair
Wed 10/710:20 am
LHR
-
ORD
1 stop13h 30m
Finnair
Deal found 7/2$869
This Cheapflightsfares deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:05 pm
ORD
-
LHR
Nonstop8h 00m
British Airways
Fri 10/233:15 pm
LHR
-
ORD
Nonstop9h 00m
British Airways
Deal found 7/1$870
This Virgin Atlantic deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/189:30 am
MDW
-
LHR
2 stops15h 20m
Virgin Atlantic
Wed 11/256:30 am
LHR
-
MDW
2 stops21h 40m
Virgin Atlantic
Deal found 7/1$870
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:15 pm
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Sun 10/259:05 pm
LHR
-
ORD
2 stops25h 40m
Scandinavian Airlines
Deal found 7/2$871
This Priceline deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/191:55 pm
ORD
-
LHR
2 stops15h 25m
Multiple Airlines
Sun 11/298:35 pm
LHR
-
ORD
1 stop26h 45m
Multiple Airlines
Deal found 7/1$872
This KAYAK deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:45 pm
ORD
-
LHR
1 stop27h 35m
British Airways
Sun 10/182:45 pm
LHR
-
ORD
Nonstop8h 50m
British Airways
Deal found 7/1$873
This Justfly.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:05 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Fri 10/239:45 am
LHR
-
ORD
Nonstop8h 45m
British Airways
Deal found 7/1$875
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:25 pm
ORD
-
LHR
1 stop10h 30m
Multiple Airlines
Thu 8/208:45 am
LHR
-
ORD
2 stops16h 30m
Multiple Airlines
Deal found 7/3$876

Find flight deals from Chicago to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$865
(FlightHub)

One-way from

$313
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,090

Good round-trip deal

$1,013 or less

Good one-way deal

$441 or less
Provider with most accurate pricing for Chicago (CHI)-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-London Heathrow flights.
Search Deals
From Chicago (CHI) to London Heathrow
Search Deals
One-way flight from Chicago (CHI) to London Heathrow
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($287 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($51 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2026.
Use the filters below to find and compare flights from Chicago to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 12/9

5:45 pm-7:55 am

Nonstop8h 10m

London Heathrow

Sun 12/13

7:30 am-3:20 pm

1 stop13h 50m

$909

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 10/8

4:25 pm-6:45 am

Nonstop8h 20m

London Heathrow

Mon 10/12

5:50 pm-12:00 pm

1 stop24h 10m

$912

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Wed 9/16

10:48 am-6:25 am

1 stop13h 37m

London Heathrow

Thu 9/24

8:40 am-6:19 pm

2 stops15h 39m

$938

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Fri 12/11

12:30 pm-7:05 am

1 stop12h 35m

London Heathrow

Thu 12/17

1:00 pm-6:37 pm

1 stop11h 37m

$943

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 9/20

9:29 am-7:10 am

1 stop15h 41m

London Heathrow

Tue 9/29

12:25 pm-6:19 pm

1 stop11h 54m

$967

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 12/24

3:45 pm-5:55 am

Nonstop8h 10m

London Heathrow

Thu 1/14

7:40 am-10:45 am

Nonstop9h 05m

$968

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Fri 10/30

1:28 pm-8:45 am

1 stop14h 17m

London Heathrow

Sun 11/8

6:20 am-4:39 pm

2 stops16h 19m

$971

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/9

9:40 pm-11:55 am

Nonstop8h 15m

London Heathrow

Sun 8/23

7:25 am-2:00 pm

1 stop12h 35m

$974

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/20

4:25 pm-6:45 am

Nonstop8h 20m

London Heathrow

Sat 12/12

7:30 am-3:20 pm

1 stop13h 50m

$983

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 9/1

1:51 pm-1:05 pm

1 stop17h 14m

London Heathrow

Sun 9/6

6:30 am-3:57 pm

2 stops15h 27m

$987

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 46 resultsSorted by cheapest first
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Compare providers for flights from Chicago to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Heathrow in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
GotogatePrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to London Heathrow Airport

What is the cheapest month to book a flight from Chicago to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $110). Flying from Chicago to London Heathrow Airport in September is currently the most expensive (average of $1,874). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to LHR?

Find hourly flight availability from Chicago to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago to London Heathrow Airport as you normally would.

Weekly flight availability from Chicago to London Heathrow Airport

Explore weekly flight availability from Chicago to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 3, 2026.

The most flights from CHI to LHR are scheduled on a Monday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (49 on average).

How much does it cost to fly round-trip from Chicago to London Heathrow Airport?

What’s the top layover airport for flights from Chicago to London Heathrow Airport?

Share of 1-stop round-trip flights from Chicago to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Lisbon (LIS) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago to London Heathrow Airport on Cheapflights.

What’s the cheapest layover airport for flights from Chicago to London Heathrow Airport?

Average round-trip fare for 1-stop flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $505.

What’s the fastest layover option from Chicago to London Heathrow Airport?

Shortest average travel time for 1-stop one-way flights from Chicago to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 10h 20m.

Which airport typically offers the quickest layover for flights from Chicago to London Heathrow Airport?

Average layover duration for 1-stop one-way flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 0h 58m.

How often are flights from Chicago to London delayed?

About 25% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 172 minutes.

What is the most punctual flight time for Chicago to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to London flights?

Over the last year, British Airways have had the lowest number of delays on this route, with just 24% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from Chicago to London Heathrow Airport, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

The best insider tips for Chicago to London Heathrow Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to London Heathrow Airport trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Emily Zemler

Emily Zemler

Expert on Iberia

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated July 3, 2026.
Peruse reviews from past customers who have flown with United Airlines,Aer Lingus, andAmerican Airlines from Chicago to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
United Airlines
7.4
Good
9,927 reviews
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Aer Lingus
7.3
Good
1,638 reviews
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
American Airlines
7.1
Good
11,764 reviews
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Iberia
7.0
Good
3,250 reviews
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
British Airways
6.7
Okay
8,091 reviews
United Airlines
7.4
Good
9,927 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.7

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!

Related info for your journey

Find useful and relevant information for your journey from Chicago to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to London Heathrow Airport?

    There are many flights that can get you from Chicago to London Heathrow Airport in 8h 10m. Fly via United Airlines, Delta, or Virgin Atlantic to get the fastest option. Chicago and London Heathrow Airport are separated by a distance of 3939 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to London Heathrow Airport round-trip?

    Our cheapest airline available from Chicago to London Heathrow Airport is JetBlue. Our recent data shows that you can find tickets from as low as $51 on this airline. Additional options worth looking into are Scandinavian Airlines and TAP AIR PORTUGAL, starting at $338 and $428 round-trip. You may be able to fly from Chicago to London Heathrow Airport for 93% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Chicago to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $135. Icelandair flights start at $229 while deals on Finnair start at $279 one-way.

  • What are the most reliable airlines from Chicago to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to London Heathrow Airport on time: SriLankan Airlines (74%), Gulf Air (69%), Malaysia Airlines (69%).

  • What are the cheapest flights from Chicago to London Heathrow Airport?

    On average you can expect to pay $3,619 for a flight from Chicago to London Heathrow Airport. The cheapest flight overall is $324 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $603.

  • Where are the most common layover locations when flying from Chicago to London Heathrow Airport?

    Chicago to London Heathrow Airport flights have a layover in Reykjavik most often.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are currently the most popular points of interest in Reykjavik at the moment. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $68 per day.

  • Where are the least popular layover locations for Chicago to London Heathrow Airport flights?

    Chicago to London Heathrow Airport flights that have layovers will least frequently stop in Dublin.

  • Can I find deals for flights from Chicago to Heathrow that include hotel bookings?

    Yes. In addition to deals on Chicago to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Heathrow.

  • Can I find deals for business class flights from Chicago to Heathrow?

    Yes. Cheapflights offers flight deals from Chicago to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $110). Flying from Chicago to London Heathrow Airport in September is currently the most expensive (average of $1,874). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Chicago to Heathrow

Discover the top 10 airlines that operate flights from Chicago to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$81FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$338Average$593FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$428Average$696FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$458Average$786FlexibilityNo cancel feeOn-time79%
IcelandairCheapest$481Average$538FlexibilityNo cancel feeOn-time76%
FinnairCheapest$513Average$822FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$513Average$823FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$522Average$809FlexibilityNo cancel feeOn-time75%
IberiaCheapest$527Average$759FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$572Average$822FlexibilityNo cancel feeOn-time69%

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