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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £411

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
15 Jun — 22 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in September or February, booked 44 days in advance, depart on a Thursday or Wednesday and return on a Sunday

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 16 May 2026.

Tue 1/913:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Thu 1/1019:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Deal found 11/5£515
Mon 7/913:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Thu 1/1019:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 14/5£516
Tue 1/913:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Tue 8/919:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Deal found 13/5£518
Sat 6/609:30
LHR
-
ORD
1 stop30h 48m
United Airlines
Sun 7/615:53
ORD
-
LHR
1 stop12h 47m
United Airlines
Deal found 15/5£521
Thu 15/1015:15
LHR
-
ORD
Nonstop9h 00m
British Airways
Tue 20/1021:15
ORD
-
LHR
Nonstop8h 00m
British Airways
Deal found 11/5£521
Sat 30/514:05
LHR
-
ORD
1 stop26h 13m
United Airlines
Mon 1/608:00
ORD
-
LHR
1 stop16h 55m
United Airlines
Deal found 14/5£522
Tue 22/913:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Tue 29/919:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 11/5£523
Sat 12/921:25
LHR
-
ORD
1 stop26h 50m
Icelandair
Thu 17/919:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Deal found 12/5£524
Wed 2/913:45
LHR
-
ORD
1 stop28h 55m
TAP AIR PORTUGAL
Wed 7/1018:00
ORD
-
LHR
1 stop17h 45m
TAP AIR PORTUGAL
Deal found 14/5£525
Wed 9/913:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Wed 23/919:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Deal found 12/5£527
Wed 2/913:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Tue 8/919:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 13/5£527

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 16 May 2026.

Round-trip from

£515

One-way from

£411

Popular in

March

Cheapest in

September

Average price

£603

Good round-trip deal

£693 or less

Good one-way deal

£539 or less
Icelandair
  • Icelandair
  • 1/9-1/10
  • 2 total stops
  • 33h 15m total
  • London to Chicago
Search Deals
4/6
  • 4/6
  • 2 total stops
  • 25h 10m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£14 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from London Heathrow to Chicago O'Hare Intl.
Search Deals

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 16 May 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

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 30/5

14:05-10:18

1 stop26h 13m

Chicago O'Hare Intl

Mon 1/6

08:00-06:55

1 stop16h 55m

£522

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 14/10

06:40-16:10

1 stop15h 30m

Chicago O'Hare Intl

Wed 21/10

19:15-18:50

2 stops17h 35m

£591

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 10/10

06:40-16:10

1 stop15h 30m

Chicago O'Hare Intl

Thu 15/10

19:15-18:50

2 stops17h 35m

£620

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/10

08:45-15:55

1 stop13h 10m

Chicago O'Hare Intl

Thu 15/10

05:00-21:20

1 stop10h 20m

£629

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/6

11:55-22:58

1 stop17h 03m

Chicago O'Hare Intl

Sun 7/6

08:49-06:30

1 stop15h 41m

£634

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/6

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Thu 11/6

10:05-09:35

2 stops17h 30m

£665

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 15/7

19:50-12:40

1 stop22h 50m

Chicago O'Hare Intl

Sun 30/8

18:00-22:55

1 stop22h 55m

£687

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 28/5

21:25-21:25

1 stop30h 00m

Chicago O'Hare Intl

Wed 24/6

19:25-20:20

1 stop18h 55m

£694

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 21/10

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Mon 2/11

15:45-05:55

Nonstop8h 10m

£700

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 21/6

08:45-12:35

1 stop33h 50m

Chicago O'Hare Intl

Sun 28/6

18:45-09:00

Nonstop8h 15m

£721

Flights are sorted by cheapest return flights first.

Deals found on 14/5

Showing 1-10 of 23 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 43 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £447). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of £739). 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 16 May 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 16 May 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
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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
9,727 reviews
United Airlines
7.4
Good
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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
1,563 reviews
United Airlines
7.4
Good
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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
654 reviews
United Airlines
7.4
Good
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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
8,004 reviews
United Airlines
7.4
Good
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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
7,982 reviews
United Airlines
7.4
Good
9,727 reviews
Check prices

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

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 United Airlines, Scandinavian Airlines, and JetBlue fly from London Heathrow Airport to Chicago O'Hare Intl Airport in about 15h 30m. The time it takes to get you to your destination can typically vary by up to 10h 43m. 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 £347 on this airline. Additional options worth looking into are Aer Lingus and Icelandair, starting at £366 and £370 round-trip. Users have found that Virgin Atlantic is 40% 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?

    £313 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 £327 and £338, 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 SriLankan Airlines (94%), Air Canada (90%) and Austrian Airlines (90%).

  • 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 £1,030, our data shows the cheapest flight currently is £413. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £402 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £447). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of £739). 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 16 May 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 16 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£347Average£533FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£366Average£645FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£370Average£499FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£371Average£523FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£388Average£517FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£396Average£615FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£397Average£588FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£398Average£615FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£403Average£647FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£418Average£624FlexibilityNo 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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