Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Chicago from £327

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or March, booked 47 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chicago (CHI). 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 25 March 2025.

Round-trip from

£415

One-way from

£327

Popular in

August

Cheapest in

February

Average price

£482

Good round-trip deal

£563 or less

Good one-way deal

£585 or less
Icelandair
  • Icelandair
  • 6/6-8/6
  • 2 total stops
  • 30h 05m total
  • London to Chicago
Search Deals
7/5
  • 7/5
  • 2 total stops
  • 43h 44m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from London Heathrow to Chicago (CHI).
Search Deals

Find flight deals from Heathrow to Chicago

Cheapest flights from Heathrow to Chicago
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2025.

Fri 6/613:05LHR - ORD
1 stop11h 10mIcelandair
Sun 8/619:25ORD - LHR
1 stop18h 55mIcelandair
Deal found 24/3£415
Sun 4/506:00LHR - ORD
1 stop12h 10mMultiple Airlines
Sun 11/518:05ORD - LHR
Nonstop8h 15mMultiple Airlines
Deal found 23/3£416
Sun 20/406:00LHR - ORD
1 stop13h 20mAustrian Airlines
Sun 27/411:15ORD - LHR
1 stop17h 25mAustrian Airlines
Deal found 24/3£417
Sat 26/407:40LHR - ORD
1 stop12h 20mBritish Airways
Fri 9/520:30ORD - LHR
Nonstop8h 00mBritish Airways
Deal found 24/3£418
Sat 3/506:30LHR - ORD
1 stop12h 25mLufthansa
Sat 10/516:05ORD - LHR
Nonstop8h 15mLufthansa
Deal found 24/3£418
Sun 4/506:50LHR - ORD
1 stop11h 10mUnited Airlines
Mon 12/517:55ORD - LHR
1 stop10h 45mUnited Airlines
Deal found 24/3£428
Wed 23/406:50LHR - ORD
2 stops14h 05mAir Canada
Tue 29/414:05ORD - LHR
1 stop15h 45mAir Canada
Deal found 24/3£430
Mon 5/509:30LHR - ORD
1 stop14h 20mAmerican Airlines
Sun 11/520:30ORD - LHR
Nonstop8h 00mAmerican Airlines
Deal found 24/3£437
Wed 23/411:45LHR - MDW
1 stop12h 35mVirgin Atlantic
Wed 30/419:00MDW - LHR
1 stop12h 10mVirgin Atlantic
Deal found 24/3£438
Tue 22/415:15LHR - MDW
1 stop13h 07mKLM
Wed 30/412:48MDW - LHR
1 stop11h 57mKLM
Deal found 24/3£442
Sat 3/510:20LHR - ORD
1 stop13h 05mFinnair
Fri 9/520:30ORD - LHR
Nonstop8h 00mFinnair
Deal found 24/3£444
Wed 10/908:40LHR - ORD
1 stop12h 00mDelta
Tue 16/914:10ORD - LHR
1 stop11h 55mDelta
Deal found 23/3£445

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Chicago 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 858,174 searches. Data last updated 25 March 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.

Fly from

Heathrow

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 6/6

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Sun 8/6

19:25-20:20

1 stop18h 55m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 4/5

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Sun 11/5

18:05-08:20

Nonstop8h 15m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 26/4

07:40-14:00

1 stop12h 20m

Chicago O'Hare Intl

Fri 9/5

20:30-10:30

Nonstop8h 00m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 3/5

06:30-12:55

1 stop12h 25m

Chicago O'Hare Intl

Tue 13/5

18:05-08:20

Nonstop8h 15m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 21/4

11:05-14:10

Nonstop9h 05m

Chicago O'Hare Intl

Mon 28/4

18:05-08:20

Nonstop8h 15m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 4/5

06:50-12:00

1 stop11h 10m

Chicago O'Hare Intl

Tue 13/5

15:52-11:35

1 stop13h 43m

£428

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 19/4

14:05-20:00

1 stop11h 55m

Chicago O'Hare Intl

Fri 2/5

18:30-11:50

1 stop11h 20m

£432

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

09:30-17:50

1 stop14h 20m

Chicago O'Hare Intl

Sun 11/5

20:30-10:30

Nonstop8h 00m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 23/4

11:45-18:20

1 stop12h 35m

Chicago Midway

Wed 30/4

19:00-13:10

1 stop12h 10m

£438

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 22/4

15:15-22:22

1 stop13h 07m

Chicago Midway

Wed 30/4

12:48-06:45

1 stop11h 57m

£442

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 37 results
1
2
3
4

Best time to book a flight from Heathrow to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Chicago

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Chicago. Price data was last updated on 21 March 2025.

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £595). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £843). 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 LHR to CHI?

Find hourly flight availability from Heathrow to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 March 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago in the evening. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the afternoon.

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

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

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

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago when rainfall is around 43.0 mm.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated 25 March 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to Chicago 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.
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

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

    Currently priced at £415, Icelandair will fly you from London Heathrow Airport to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Austrian Airlines and British Airways - these airlines can fly you to your destination from £417 and £418, respectively. These flights start at 26% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £337. Icelandair flights start at £368 while deals on Aer Lingus start at £398 one-way.

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

    Before booking your flight to Chicago from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Air Canada (93%), Austrian Airlines (93%), United Airlines( 93%).

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

    Looking for the cheapest flight from London Heathrow Airport to Chicago? While on average our users pay £1,756, our data indicates the cheapest price to be £434. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £353.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Chicago 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 London Heathrow Airport to Chicago?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £595). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £843). 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

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.

Fly from Heathrow to Chicago on these airlines

Choose from the following airlines for your flight from Heathrow to Chicago. Flights are based on user searches made on Cheapflights and were last updated on 25 March 2025.
British Airways flights from London Heathrow to Chicago
Finnair flights from London Heathrow to Chicago
Lufthansa flights from London Heathrow to Chicago

Top 10 airlines flying from Heathrow to Chicago

Discover the top 10 airlines that operate flights from Heathrow to Chicago. 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 858,174 searches. Data last updated 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£360Average£517FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£367Average£521FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£381Average£611FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Austrian AirlinesCheapest£422Average£579FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£424Average£582FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£424Average£598FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£428Average£613FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£433Average£593FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£438Average£707FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Aer LingusCheapest£449Average£589FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Chicago?

Cheapflights makes it easy to find Heathrow to Chicago flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Chicago with no change fees?

Certainly. Search results for flights to Chicago from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Chicago become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.