HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$237+ 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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chicago to London Heathrow are usually found in January or February, booked 29 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Find 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 November 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:30 pmORD - LHR
1 stop10h 20mIcelandair
Wed 11/198:35 pmLHR - ORD
1 stop26h 45mIcelandair
Deal found 11/1$535
This CrystalTravel deal was found by Cheapflights users on 11/1. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Fri 12/126:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Deal found 11/1$537
This Justfly.com deal was found by Cheapflights users on 11/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:10 amORD - LHR
2 stops26h 50mScandinavian Airlines
Tue 12/97:50 pmLHR - ORD
2 stops26h 55mScandinavian Airlines
Deal found 11/2$539
This oojo deal was found by Cheapflights users on 11/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:30 pmORD - LHR
1 stop10h 20mIcelandair
Sat 11/228:35 pmLHR - ORD
1 stop26h 45mIcelandair
Deal found 11/2$541
This KAYAK deal was found by Cheapflights users on 11/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:30 pmORD - LHR
1 stop10h 20mIcelandair
Tue 11/2512:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 11/2$542
This Scandinavian Airlines deal was found by Cheapflights users on 11/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:35 amORD - LHR
2 stops25h 05mScandinavian Airlines
Tue 12/27:50 pmLHR - ORD
2 stops26h 55mScandinavian Airlines
Deal found 11/1$543
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:20 pmORD - LHR
1 stop20h 20mScandinavian Airlines
Wed 12/246:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Deal found 11/2$544
This Rumbo deal was found by Cheapflights users on 11/1. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:35 amORD - LHR
1 stop14h 15mVirgin Atlantic
Tue 11/188:55 amLHR - ORD
1 stop12h 15mVirgin Atlantic
Deal found 11/1$545
This CrystalTravel deal was found by Cheapflights users on 11/2. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Sat 12/66:40 amLHR - ORD
2 stops16h 05mScandinavian Airlines
Deal found 11/2$546
This oojo deal was found by Cheapflights users on 11/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/227:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Wed 11/2610:35 amLHR - ORD
2 stops36h 10mScandinavian Airlines
Deal found 11/2$547
This Mytrip deal was found by Cheapflights users on 11/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:20 pmORD - LHR
2 stops20h 00mScandinavian Airlines
Sat 12/65:30 pmLHR - ORD
2 stops29h 15mScandinavian Airlines
Deal found 11/1$548
This Gotogate deal was found by Cheapflights users on 11/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:40 pmORD - LHR
1 stop9h 45mAer Lingus
Tue 11/188:50 amLHR - ORD
1 stop11h 10mAer Lingus
Deal found 11/1$549

Cheap 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 November 3, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$535
(Kiwi.com)

One-way from

$237
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$685

Good round-trip deal

$705 or less

Good one-way deal

$436 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. 21% potential increase in price ($223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 3, 2025.
Use the filters below to find and compare flights from Chicago to London Heathrow Airport that are best for you.

Fly from

Chicago

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 11/18

10:35 am-6:30 pm

2 stops25h 55m

London Heathrow

Tue 11/25

7:50 pm-4:45 pm

2 stops26h 55m

$573

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/22

7:30 am-9:35 am

2 stops20h 05m

London Heathrow

Mon 4/27

6:40 am-4:10 pm

2 stops15h 30m

$576

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 11/17

9:45 pm-11:35 am

Nonstop7h 50m

London Heathrow

Wed 12/3

11:00 am-1:50 pm

Nonstop8h 50m

$582

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/19

9:30 am-6:50 am

2 stops15h 20m

London Heathrow

Wed 12/3

8:55 am-3:10 pm

1 stop12h 15m

$584

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/16

9:45 pm-11:35 am

Nonstop7h 50m

London Heathrow

Fri 2/27

11:00 am-1:50 pm

Nonstop8h 50m

$590

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/19

3:50 pm-11:25 am

1 stop13h 35m

London Heathrow

Tue 12/2

8:55 am-4:45 pm

1 stop13h 50m

$597

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 11/18

1:47 pm-7:05 am

1 stop11h 18m

London Heathrow

Tue 12/2

11:05 am-6:18 pm

1 stop13h 13m

$597

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Wed 11/26

5:34 pm-11:40 am

1 stop12h 06m

London Heathrow

Tue 12/9

3:50 pm-11:47 pm

1 stop13h 57m

$597

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 11/17

6:00 am-6:25 am

1 stop18h 25m

London Heathrow

Wed 11/26

11:05 am-6:18 pm

1 stop13h 13m

$597

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 11/16

10:47 am-6:25 am

1 stop13h 38m

London Heathrow

Fri 11/28

1:00 pm-8:52 am

1 stop25h 52m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 46 results
1
2
3
...
5

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*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 Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on Chicago-London Heathrow Airport flight deals on Cheapflights vs. Gotogate >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 Gotogate the most. Gotogate 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

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

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Heathrow. Price data was last updated on October 31, 2025.

To ensure you get the cheapest price possible for a flight from Chicago to London Heathrow Airport, you should look to book at least 29 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.

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

Currently, May is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $399). Flying from Chicago to London Heathrow Airport in June is currently the most expensive (average of $901). 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 November 3, 2025.

When flying from Chicago to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 56% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Chicago to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to London Heathrow Airport flight should consider departing on Friday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 3, 2025.

The most flights from CHI to LHR are scheduled on a Sunday (45 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (39 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.

Reykjavik (KEF) – chosen by Cheapflights users on 55% 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.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $623.

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 Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 03m.

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 1h 11m.

The best insider tips for Chicago to London Heathrow Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to London Heathrow Airport trip
Airlines
British Airways

BA's Club Suite offers private pods with doors, available on A350 and most 777 aircraft.


BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh
Iberia

Iberia's premium economy offers 37-inch legroom, footrests, and noise-canceling headphones for long-haul comfort.


Iberia offers two hot meal options on long-haul flights, with special meals available upon request.

Read more about Iberiaby Emily Zemler
Airports
ORD

For a smooth departure from ORD, consider taking the "L" train to avoid Chicago traffic delays, especially during peak hours.

Read more about ORDby Ramsey Qubein
LHR

Upon arrival at LHR, the Heathrow Express offers the fastest route to central London, reaching Paddington Station quickly.

Read more about LHRby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

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 Zemler

Emily Zemler

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

Ramsey Qubein

Ramsey Qubein

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 November 3, 2025.
Peruse reviews from past customers who have flown with Finnair, United Airlines, and American 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.
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Finnair
7.6
Good
1,335 reviews
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
United Airlines
7.4
Good
8,996 reviews
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
American Airlines
7.2
Good
11,035 reviews
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Iberia
7.0
Good
3,005 reviews
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
British Airways
6.7
Okay
7,494 reviews
Finnair
7.6
Good
1,335 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Comfort

7.4

Food

6.7

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

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 7h 50m. Fly via Scandinavian Airlines, British Airways, or Delta 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 SWISS and Scandinavian Airlines, starting at $257 and $338 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 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: Gulf Air (75%), Malaysia Airlines (72%), Air Canada (70%).

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

    On average you can expect to pay $2,667 for a flight from Chicago to London Heathrow Airport. The cheapest flight overall is $396 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $429.

  • 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 $48 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, May is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $399). Flying from Chicago to London Heathrow Airport in June is currently the most expensive (average of $901). 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
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

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.

Alternative routes for Chicago to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
O'Hare Intl to Gatwick flights
O'Hare Intl to London City flights
Midway to Heathrow flights
O'Hare Intl to Stansted flights
O'Hare Intl to Luton flights
St. Louis to Heathrow flights
Midway to Gatwick flights
St. Louis to Gatwick flights
St. Louis to London City flights
St. Louis to Stansted flights
Moline to Heathrow flights
Midway to London City flights
St. Louis to Luton flights
Peoria to Heathrow flights
Champaign to Heathrow flights
Bloomington to Heathrow flights
Evansville to Heathrow flights
Peoria to London City flights
Springfield to Heathrow flights
Peoria to Gatwick flights
Midway to Luton flights
Midway to Stansted flights
Moline to Gatwick flights
Dubuque to Heathrow flights
Evansville to Gatwick flights
Bloomington to Gatwick flights

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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$625FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$594FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$338Average$569FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$870FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$450Average$644FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$460Average$947FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$481Average$610FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$487Average$677FlexibilityNo cancel feeOn-time75%
Aer LingusCheapest$515Average$818FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$542Average$793FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.