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Cheap flights from London Heathrow Airport to Chicago from £405

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 23/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
14 Dec — 21 Dec1
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 56 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

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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 14 November 2025.

Tue 16/1220:35LHR - ORD
1 stop26h 45mIcelandair
Tue 6/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 13/11£416
Tue 18/1120:35LHR - ORD
1 stop26h 45mIcelandair
Thu 4/1218:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 12/11£419
Thu 25/1215:35LHR - ORD
2 stops31h 10mScandinavian Airlines
Wed 31/1219:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 12/11£419
Wed 3/1212:15LHR - ORD
1 stop11h 05mIcelandair
Wed 10/1218:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 13/11£422
Tue 2/1220:35LHR - ORD
1 stop26h 45mIcelandair
Mon 8/1218:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 13/11£423
Sun 23/1120:35LHR - ORD
1 stop26h 45mIcelandair
Tue 2/1218:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 12/11£423
Sun 23/1120:35LHR - ORD
1 stop26h 45mIcelandair
Thu 27/1118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 12/11£426
Sat 6/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 7/1219:20ORD - LHR
1 stop17h 10mScandinavian Airlines
Deal found 12/11£427
Sat 13/1219:55LHR - ORD
1 stop24h 50mTAP AIR PORTUGAL
Fri 9/120:15ORD - LHR
1 stop16h 40mTAP AIR PORTUGAL
Deal found 12/11£429
Tue 25/1112:15LHR - ORD
1 stop11h 05mIcelandair
Wed 3/1218:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 13/11£429
Tue 25/1112:15LHR - ORD
1 stop11h 05mIcelandair
Tue 2/1218:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 12/11£430
Tue 9/1210:00LHR - MDW
2 stops19h 47mVirgin Atlantic
Tue 16/1217:39MDW - LHR
1 stop12h 01mVirgin Atlantic
Deal found 11/11£498

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 14 November 2025.

Round-trip from

£413

One-way from

£405

Popular in

July

Cheapest in

February

Average price

£540

Good round-trip deal

£579 or less

Good one-way deal

£457 or less
Icelandair
  • Icelandair
  • 10/1-25/1
  • 2 total stops
  • 37h 05m total
  • London to Chicago
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 23/12
  • 1 total stop
  • 29h 10m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£48 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 November 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 14 November 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

Thu 15/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sun 25/1

19:10-16:25

2 stops15h 15m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 7/12

19:20-18:30

1 stop17h 10m

£428

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/12

19:30-21:39

2 stops32h 09m

Chicago O'Hare Intl

Mon 8/12

19:20-18:50

2 stops17h 30m

£474

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

11:00-13:50

Nonstop8h 50m

Chicago O'Hare Intl

Tue 10/3

22:45-11:35

Nonstop7h 50m

£480

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 15/12

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Tue 13/1

18:30-10:50

1 stop10h 20m

£481

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

06:35-14:10

1 stop13h 35m

Chicago O'Hare Intl

Tue 10/3

18:45-07:55

Nonstop8h 10m

£490

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 27/11

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Mon 29/12

19:20-21:35

2 stops20h 15m

£498

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/1

19:30-22:00

2 stops32h 30m

Chicago O'Hare Intl

Mon 12/1

19:20-18:50

2 stops17h 30m

£506

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 13/12

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Thu 14/5

19:25-11:55

1 stop10h 30m

£512

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 23/12

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Mon 5/1

18:30-10:50

1 stop10h 20m

£514

Flights are sorted by cheapest return flights first.

Deals found on 13/11

Showing 1-10 of 41 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 7 November 2025.

Booking 56 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 £362). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £511). 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 14 November 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 14 November 2025.

The most flights from LHR to CHI are scheduled on a Thursday (42 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (30 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 31% 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 £379.

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 30m.

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 14 November 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
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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
1,370 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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
7.1
Good
578 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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
7,572 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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
7,521 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Overall

7.6

Crew

8.1

Comfort

7.4

Entertainment

6.9

Boarding

7.6

Food

6.7

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 8h 50m. Fly via Scandinavian Airlines, British Airways, or Icelandair 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 £347, 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 £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 Austrian Airlines, which is currently one of the cheapest options available, starting at £409. Delta flights start at £413 while deals on Virgin Atlantic start at £413 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 (84%), Austrian Airlines (84%), United Airlines( 84%).

  • 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 £1,294, our data indicates the cheapest price to be £370. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £326.

  • 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 £362). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £511). 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 14 November 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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£347Average£461FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£352Average£569FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£367Average£490FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£376Average£623FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£377Average£601FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest£394Average£551FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£404Average£587FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£412Average£579FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£412Average£614FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£416Average£552FlexibilityNo 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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