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Cheap flights from London Heathrow Airport to Chicago from £382

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 13/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
25 Jan — 1 Feb1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or September, booked 45 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from Heathrow to Chicago

Enter your travel dates to find the best prices.

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 26 December 2025.

Thu 25/1218:30LHR - ORD
1 stop26h 55mTAP AIR PORTUGAL
Sun 11/120:25ORD - LHR
1 stop15h 05mTAP AIR PORTUGAL
Deal found 23/12£479
Thu 25/1219:55LHR - ORD
1 stop25h 30mTAP AIR PORTUGAL
Fri 9/120:15ORD - LHR
1 stop15h 15mTAP AIR PORTUGAL
Deal found 23/12£491
Thu 25/1219:55LHR - ORD
1 stop25h 30mTAP AIR PORTUGAL
Wed 31/1219:10ORD - LHR
1 stop14h 20mTAP AIR PORTUGAL
Deal found 24/12£531
Thu 25/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Mon 12/119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 23/12£548
Fri 26/1206:00LHR - ORD
1 stop15h 25mTAP AIR PORTUGAL
Sun 11/120:25ORD - LHR
1 stop15h 05mTAP AIR PORTUGAL
Deal found 23/12£571
Thu 25/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sat 10/119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 23/12£594
Tue 30/1212:35LHR - ORD
Nonstop8h 50mFinnair
Wed 14/120:45ORD - LHR
Nonstop7h 40mFinnair
Deal found 24/12£596
Fri 26/1219:50LHR - ORD
2 stops26h 55mScandinavian Airlines
Thu 22/119:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 24/12£598
Tue 30/1219:25LHR - ORD
1 stop24h 35mAustrian Airlines
Wed 7/115:45ORD - LHR
Nonstop8h 10mAustrian Airlines
Deal found 23/12£605
Wed 24/1206:30LHR - MDW
2 stops16h 56mDelta
Tue 13/117:31MDW - LHR
1 stop12h 09mDelta
Deal found 23/12£906
Wed 24/1211:05LHR - MDW
1 stop12h 14mAir France
Mon 12/113:49MDW - LHR
1 stop11h 16mAir France
Deal found 23/12£977
Thu 25/1206:30LHR - MDW
2 stops16h 56mDelta
Mon 12/113:28MDW - LHR
2 stops12h 37mDelta
Deal found 23/12£995

Find 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 26 December 2025.

Round-trip from

£424

One-way from

£382

Popular in

July

Cheapest in

February

Average price

£605

Good round-trip deal

£541 or less

Good one-way deal

£444 or less
British Airways
  • British Airways
  • 19/1-29/1
  • 1 total stop
  • 20h 55m total
  • London to Chicago
Search Deals
British Airways
  • British Airways
  • 13/2
  • Nonstop
  • 8h 50m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£46 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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

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 26 December 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

Mon 19/1

12:10-19:15

1 stop13h 05m

Chicago O'Hare Intl

Fri 30/1

18:45-08:35

Nonstop7h 50m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 21/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Thu 29/1

19:10-16:25

2 stops15h 15m

£428

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 15/1

11:45-23:59

2 stops18h 14m

Chicago O'Hare Intl

Wed 21/1

14:50-07:50

1 stop11h 00m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 22/1

08:40-18:36

2 stops15h 56m

Chicago Midway

Thu 29/1

10:48-06:50

2 stops14h 02m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 9/2

08:40-18:36

2 stops15h 56m

Chicago Midway

Mon 16/2

13:26-08:05

2 stops12h 39m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 14/1

06:30-22:07

2 stops21h 37m

Chicago Midway

Wed 28/1

13:26-09:00

2 stops13h 34m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 18/2

06:30-17:45

2 stops17h 15m

Chicago Midway

Sat 28/2

13:28-09:00

2 stops13h 32m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Sun 25/1

08:40-18:36

2 stops15h 56m

Chicago Midway

Sun 1/2

12:46-11:40

1 stop16h 54m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Fri 6/2

08:40-18:36

2 stops15h 56m

Chicago Midway

Wed 11/2

13:51-07:05

1 stop11h 14m

£437

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 22/1

08:40-17:55

2 stops15h 15m

Chicago Midway

Wed 28/1

13:49-07:05

1 stop11h 16m

£437

Flights are sorted by cheapest return flights first.

Deals found on 24/12

Showing 1-10 of 40 results
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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 19 December 2025.

Booking 45 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £352). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £497). 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 26 December 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago in the afternoon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight at midday.

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 afternoons 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.

Weekly flight availability from London Heathrow Airport to Chicago

Explore weekly flight availability from Heathrow to Chicago. 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 26 December 2025.

The most flights from LHR to CHI are scheduled on a Wednesday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (32 on average).

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

Share of one-stop return flights from London Heathrow Airport to Chicago chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 35% of one-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.

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

Average return fare for one-stop flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £369.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 32m.

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

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

Flights via Helsinki (HEL) offer the fastest connection on this route, with an average stopover time of 1h 15m.

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 172 minutes.

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

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

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

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

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

Over the past year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

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 26 December 2025.
See what other customers who have flown with Finnair, Aer Lingus, andIcelandair from London Heathrow Airport to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,339 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Aer Lingus
7.2
Good
1,412 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.0
Good
592 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,653 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,617 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.6

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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.

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

    There are many flights that can get you from London Heathrow Airport to Chicago in 12h 25m. Fly via British Airways, Scandinavian Airlines, or Delta to get the fastest option. London Heathrow Airport and Chicago are separated by a distance of 3939 mi. This flight may include one or multiple stops.

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

    Currently priced at £336, 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 Virgin Atlantic and Scandinavian Airlines - these airlines can fly you to your destination from £343 and £353, respectively. These flights start at 36% 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 Scandinavian Airlines, which is currently one of the cheapest options available, starting at £261. JetBlue flights start at £308 while deals on Icelandair start at £326 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: Austrian Airlines (88%), Brussels Airlines (88%), Lufthansa( 88%).

  • 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 £1,068, our data indicates the cheapest price to be £377. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £254.

  • 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £352). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £497). 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

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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 26 December 2025.
British Airways flights from London Heathrow to Chicago
Lufthansa flights from London Heathrow to Chicago
Finnair 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 26 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£336Average£455FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£343Average£527FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£353Average£476FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£363Average£621FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£380Average£603FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£383Average£539FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£392Average£565FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£401Average£565FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£401Average£606FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£406Average£547FlexibilityNo cancel feeOn-time69%
Search United Airlines 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.

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