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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £434

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
23 Jul — 30 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in February or September, booked 56 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from Heathrow to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to O'Hare Intl
Explore the most affordable flight options available from Heathrow to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 June 2026.

Thu 25/606:30
LHR
-
ORD
1 stop12h 25m
Lufthansa
Sat 12/914:32
ORD
-
LHR
1 stop13h 08m
Lufthansa
Deal found 18/6£573
Wed 16/908:30
LHR
-
ORD
2 stops17h 42m
Air Canada
Fri 9/1017:35
ORD
-
LHR
1 stop12h 15m
Air Canada
Deal found 21/6£573
Wed 1/713:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Wed 8/719:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 19/6£574
Sun 20/918:40
LHR
-
ORD
1 stop23h 55m
SWISS
Fri 25/919:05
ORD
-
LHR
2 stops15h 30m
SWISS
Deal found 22/6£575
Tue 1/909:45
LHR
-
ORD
Nonstop8h 45m
British Airways
Fri 18/917:50
ORD
-
LHR
Nonstop7h 50m
British Airways
Deal found 19/6£576
Sat 5/915:15
LHR
-
ORD
Nonstop9h 00m
Iberia
Tue 22/913:35
ORD
-
LHR
1 stop10h 50m
Iberia
Deal found 20/6£577
Thu 22/1021:05
LHR
-
ORD
2 stops25h 05m
Scandinavian Airlines
Fri 30/1020:15
ORD
-
LHR
2 stops32h 20m
Scandinavian Airlines
Deal found 18/6£577
Wed 1/713:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Mon 20/719:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 21/6£578
Thu 9/721:25
LHR
-
ORD
2 stops30h 40m
Multiple Airlines
Tue 14/715:45
ORD
-
LHR
2 stops14h 10m
Multiple Airlines
Deal found 22/6£580
Sun 20/907:45
LHR
-
ORD
2 stops21h 55m
Lufthansa
Tue 13/1017:07
ORD
-
LHR
1 stop11h 18m
Lufthansa
Deal found 21/6£580
Sun 23/806:30
LHR
-
ORD
1 stop12h 25m
Lufthansa
Tue 3/1121:50
ORD
-
LHR
Nonstop8h 10m
Lufthansa
Deal found 19/6£581

Find flight deals from Heathrow to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to O'Hare Intl (ORD). 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 23 June 2026.

Round-trip from

£573

One-way from

£434

Popular in

March

Cheapest in

February

Average price

£732

Good round-trip deal

£678 or less

Good one-way deal

£514 or less
Air Canada
  • Air Canada
  • 8/9-14/9
  • 3 total stops
  • 28h 15m total
  • London to Chicago
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12/8
  • 12/8
  • 2 total stops
  • 16h 30m total
  • London to Chicago
Search Deals
High demand for flights, 1% potential price rise
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 June 2026
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Price to beat on a round-trip flight from London Heathrow to Chicago O'Hare Intl.
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Price to beat on a one-way flight from London Heathrow to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to O'Hare Intl 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 23 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/9

14:45-17:35

Nonstop8h 50m

Chicago O'Hare Intl

Thu 24/9

21:00-10:50

Nonstop7h 50m

£582

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 25/8

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Mon 31/8

19:15-16:25

2 stops15h 10m

£586

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 5/9

07:05-19:46

2 stops18h 41m

Chicago O'Hare Intl

Sat 19/9

21:01-12:10

1 stop33h 09m

£596

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 27/8

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Sat 5/9

07:30-09:20

2 stops19h 50m

£617

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 27/8

07:40-14:00

1 stop12h 20m

Chicago O'Hare Intl

Sat 5/9

19:05-09:05

Nonstop8h 00m

£617

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/7

18:40-12:35

1 stop23h 55m

Chicago O'Hare Intl

Mon 6/7

15:45-13:00

2 stops15h 15m

£652

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 2/7

07:45-16:52

2 stops15h 07m

Chicago O'Hare Intl

Sun 5/7

18:22-06:30

1 stop30h 08m

£654

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/9

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Wed 23/9

19:15-16:25

2 stops15h 10m

£663

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 17/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sat 2/1

19:15-19:55

2 stops18h 40m

£663
Cheapest one-way
Fastest single journey

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 25/9

13:10-15:55

Nonstop8h 45m

£450

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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 O'Hare Intl Airport

How far ahead should I book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 55 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £452). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of £748). 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 ORD?

Find hourly flight availability from Heathrow to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Chicago O'Hare Intl Airport as you normally would.

How much does it cost for a return flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 23 June 2026.
Check out reviews from past customers who have flown with United Airlines,Aer Lingus, andIcelandair from London Heathrow Airport to Chicago O'Hare Intl 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.
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,875 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Aer Lingus
7.3
Good
1,620 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Icelandair
7.0
Good
683 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
8,088 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
8,064 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to O'Hare Intl. 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 O'Hare Intl Airport?

    Airlines like British Airways, Scandinavian Airlines, and Finnair fly from London Heathrow Airport to Chicago O'Hare Intl Airport in about 8h 50m. The time it takes to get you to your destination can typically vary by up to 9h 51m. The distance from London Heathrow Airport to Chicago O'Hare Intl Airport is about 3939 mi. This flight may include one or multiple stops.

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

    Our cheapest airline available from London Heathrow Airport to Chicago O'Hare Intl Airport is Virgin Atlantic. Our recent data shows that you can find tickets from as low as £307 on this airline. Additional options worth looking into are Aer Lingus and Icelandair, starting at £369 and £373 round-trip. Users have found that Virgin Atlantic is 50% cheaper than the other options available to this destination.

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

    £315 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Icelandair and TAP AIR PORTUGAL, with prices starting from £330 and £345, respectively.

  • What are the most reliable airlines from London Heathrow Airport to Chicago O'Hare Intl Airport?

    The top 3 most reliable airlines when flying from London Heathrow Airport to Chicago O'Hare Intl Airport are Air Canada (91%), Austrian Airlines (91%) and United Airlines (91%).

  • What are the cheapest flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

    While on average a flight from London Heathrow Airport to Chicago O'Hare Intl Airport is generally £1,071, our data shows the cheapest flight currently is £385. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £446 for that flight.

  • Can I find deals for flights from Heathrow to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Heathrow to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to O'Hare Intl?

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

  • Can I find deals for business class flights from Heathrow to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Heathrow to O'Hare Intl 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 O'Hare Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £452). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of £748). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village

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Fly from Heathrow to O'Hare Intl on these airlines

Choose from the following airlines for your flight from Heathrow to O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on 23 June 2026.
British Airways flights from London Heathrow to Chicago O'Hare Intl
Finnair flights from London Heathrow to Chicago O'Hare Intl
Iberia flights from London Heathrow to Chicago O'Hare Intl

Top 10 airlines flying from Heathrow to O'Hare Intl

Discover the top 10 airlines that operate flights from Heathrow to O'Hare Intl. 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 23 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£307Average£537FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£369Average£664FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£373Average£507FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£375Average£535FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£393Average£538FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£401Average£624FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£416Average£655FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£418Average£636FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£434Average£687FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£436Average£677FlexibilityNo 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 O'Hare Intl?

Deals for Heathrow to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to O'Hare Intl?

Cheapflights helps you find that perfect flight to O'Hare Intl 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 O'Hare Intl with no change fees?

Certainly. Search results for flights to O'Hare Intl 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 O'Hare Intl become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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