Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Chicago from £408

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
31 8월 — 7 9월1
1 adult

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

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 26 8월 2025.

Round-trip from

£422

One-way from

£408

Popular in

July

Cheapest in

February

Average price

£613

Good round-trip deal

£495 or less

Good one-way deal

£554 or less
United Airlines
  • United Airlines
  • 13/9-5/10
  • 2 total stops
  • 44h 37m total
  • London to Chicago
Search Deals
10/11
  • 10/11
  • 2 total stops
  • 26h 24m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 26 8월 2025.

토 13/909:05LHR - ORD
1 stop34h 15mUnited Airlines
일 5/1021:25ORD - LHR
Nonstop8h 20mUnited Airlines
Deal found 25/8£422
월 1/907:25LHR - ORD
1 stop12h 40mUnited Airlines
화 30/911:45ORD - LHR
1 stop12h 10mUnited Airlines
Deal found 25/8£422
수 3/907:40LHR - ORD
1 stop14h 05mAmerican Airlines
토 13/920:40ORD - LHR
Nonstop7h 50mAmerican Airlines
Deal found 24/8£423
일 21/908:30LHR - ORD
1 stop12h 25mLufthansa
목 16/1018:00ORD - LHR
Nonstop8h 20mLufthansa
Deal found 24/8£424
월 1/908:30LHR - ORD
1 stop12h 25mUnited Airlines
일 14/921:50ORD - LHR
Nonstop7h 55mUnited Airlines
Deal found 25/8£425
일 14/906:50LHR - ORD
1 stop11h 15mUnited Airlines
금 3/1008:40ORD - LHR
1 stop15h 50mUnited Airlines
Deal found 25/8£425
일 31/806:50LHR - ORD
1 stop11h 05mUnited Airlines
토 13/910:43ORD - LHR
1 stop14h 12mUnited Airlines
Deal found 24/8£426
월 1/907:25LHR - ORD
1 stop12h 40mUnited Airlines
목 2/1014:00ORD - LHR
1 stop15h 50mUnited Airlines
Deal found 25/8£427
화 9/906:50LHR - ORD
2 stops14h 14mAir Canada
화 16/914:08ORD - LHR
1 stop13h 27mAir Canada
Deal found 24/8£428
월 1/907:25LHR - ORD
1 stop12h 40mUnited Airlines
금 3/1022:30ORD - LHR
1 stop13h 10mUnited Airlines
Deal found 25/8£428
일 31/806:00LHR - ORD
1 stop12h 10mMultiple Airlines
토 13/912:50ORD - LHR
1 stop12h 05mMultiple Airlines
Deal found 24/8£429
일 19/1010:20LHR - ORD
1 stop11h 50mScandinavian Airlines
목 6/1119:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 24/8£430

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 8월 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

수 26/11

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

금 16/1

15:45-05:55

Nonstop8h 10m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

목 27/11

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

토 17/1

13:00-06:40

1 stop11h 40m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

수 26/11

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

토 17/1

17:50-07:55

Nonstop8h 05m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

수 26/11

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

금 16/1

13:00-06:40

1 stop11h 40m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

일 5/10

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

일 12/10

16:00-06:20

Nonstop8h 20m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

일 21/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

목 16/10

14:39-06:55

1 stop10h 16m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

일 21/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

목 16/10

18:00-08:20

Nonstop8h 20m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

일 21/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

일 28/9

16:00-06:20

Nonstop8h 20m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

목 25/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

월 29/9

18:00-08:20

Nonstop8h 20m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

목 9/10

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

목 16/10

13:17-06:45

1 stop11h 28m

£424

Flights are sorted by cheapest return flights first.

Deals found on 25/8

Showing 1-10 of 39 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 22 August 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, 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 26 8월 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 17% 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.

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 8월 2025.

The most flights from LHR to CHI are scheduled on a Saturday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (47 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.

Dublin (DUB) – chosen by Cheapflights users on 28% 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 £370.

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 51m.

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 Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 21m.

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 8월 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
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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
1,320 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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
1,237 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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
533 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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
7,359 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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
7,309 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.5

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 30m. Fly via Lufthansa, United Airlines, or Virgin Atlantic 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 £342, 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 Scandinavian Airlines and TAP AIR PORTUGAL - these airlines can fly you to your destination from £352 and £367, respectively. These flights start at 35% 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 £411. Scandinavian Airlines flights start at £411 while deals on Aer Lingus start at £412 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 (73%), Austrian Airlines (73%), United Airlines( 73%).

  • 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 £1,443, our data indicates the cheapest price to be £418. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £344.

  • 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 26 8월 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 8월 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£342Average£454FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£352Average£478FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£367Average£612FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£372Average£572FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£379Average£552FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£392Average£576FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£396Average£577FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£402Average£581FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£406Average£559FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£407Average£549FlexibilityNo 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.

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.