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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £352

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 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
21 Feb — 28 Feb1
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 58 days in advance, depart on a Wednesday or Tuesday 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 22 January 2026.

Wed 28/1007:50
LHR
-
ORD
1 stop12h 10m
British Airways
Wed 11/1116:06
ORD
-
LHR
1 stop10h 34m
British Airways
Deal found 21/1£396
Thu 23/413:25
LHR
-
ORD
1 stop11h 50m
British Airways
Sun 26/422:35
ORD
-
LHR
Nonstop7h 40m
British Airways
Deal found 22/1£397
Wed 28/107:50
LHR
-
ORD
2 stops18h 14m
British Airways
Mon 2/221:00
ORD
-
LHR
1 stop16h 50m
British Airways
Deal found 20/1£398
Thu 5/212:10
LHR
-
ORD
1 stop13h 05m
British Airways
Thu 12/218:30
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 21/1£398
Thu 12/206:40
LHR
-
ORD
1 stop16h 05m
Scandinavian Airlines
Wed 4/319:20
ORD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Deal found 19/1£399
Sat 7/212:50
LHR
-
ORD
1 stop12h 25m
British Airways
Wed 18/218:30
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 20/1£400
Sat 7/212:50
LHR
-
ORD
1 stop12h 25m
British Airways
Sat 14/218:30
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 20/1£401
Fri 6/213:45
LHR
-
ORD
1 stop32h 35m
United Airlines
Tue 10/221:05
ORD
-
LHR
Nonstop8h 10m
United Airlines
Deal found 22/1£401
Wed 4/212:10
LHR
-
ORD
1 stop13h 05m
British Airways
Fri 13/211:45
ORD
-
LHR
1 stop13h 05m
British Airways
Deal found 21/1£402
Mon 16/206:00
LHR
-
ORD
1 stop14h 00m
Austrian Airlines
Tue 24/217:50
ORD
-
LHR
Nonstop8h 05m
Austrian Airlines
Deal found 20/1£403
Thu 29/108:50
LHR
-
ORD
1 stop16h 25m
British Airways
Mon 2/221:00
ORD
-
LHR
1 stop12h 35m
British Airways
Deal found 20/1£404
Thu 29/107:40
LHR
-
ORD
1 stop12h 30m
Lufthansa
Wed 11/215:45
ORD
-
LHR
Nonstop8h 10m
Lufthansa
Deal found 20/1£404

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 22 January 2026.

Round-trip from

£397

One-way from

£352

Popular in

July

Cheapest in

September

Average price

£518

Good round-trip deal

£495 or less

Good one-way deal

£448 or less
British Airways
  • British Airways
  • 23/4-26/4
  • 1 total stop
  • 19h 30m total
  • London to Chicago
Search Deals
23/2
  • 23/2
  • 3 total stops
  • 29h 31m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 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 January 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 22 January 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

Heathrow

Fly to

O'Hare Intl

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

12:50-19:15

1 stop12h 25m

Chicago O'Hare Intl

Sun 22/2

20:35-10:25

Nonstop7h 50m

£401

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

12:50-19:15

1 stop12h 25m

Chicago O'Hare Intl

Sat 14/2

18:48-12:00

1 stop11h 12m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/2

07:50-19:15

1 stop17h 25m

Chicago O'Hare Intl

Fri 27/2

21:00-19:50

1 stop16h 50m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Tue 10/3

21:35-10:25

Nonstop7h 50m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/2

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Mon 2/3

15:45-05:55

Nonstop8h 10m

£406

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/2

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Mon 2/3

15:45-05:55

Nonstop8h 10m

£406

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/3

13:30-23:44

2 stops16h 14m

Chicago O'Hare Intl

Sat 14/3

21:15-06:40

1 stop28h 25m

£411

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 12/4

06:20-14:00

1 stop13h 40m

Chicago O'Hare Intl

Thu 30/4

16:17-12:50

1 stop14h 33m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 17/4

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Wed 22/4

14:22-10:15

1 stop13h 53m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 16/4

07:40-14:00

1 stop12h 20m

Chicago O'Hare Intl

Wed 22/4

11:21-06:25

1 stop13h 04m

£415

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 20 results
1
2

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?

Use this chart to determine the optimal time to book a return flight from Heathrow to O'Hare Intl. Price data was last updated on 16 January 2026.

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 58 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 £354). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £501). 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 22 January 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 22 January 2026.
Check out reviews from past customers who have flown with Finnair, United Airlines, andAer Lingus 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.
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,353 reviews
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,191 reviews
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Aer Lingus
7.2
Good
1,441 reviews
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Lufthansa
6.8
Okay
7,738 reviews
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,690 reviews
Finnair
7.6
Good
1,353 reviews
Check prices

Boarding

7.7

Comfort

7.5

Overall

7.6

Crew

8.2

Entertainment

6.9

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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 fly from London Heathrow Airport to Chicago O'Hare Intl Airport in about 12h 25m. The time it takes to get you to your destination can typically vary by up to . The distance from London Heathrow Airport to Chicago O'Hare Intl Airport is about 3939 mi.

  • 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 Icelandair. Our recent data shows that you can find tickets from as low as £334 on this airline. Additional options worth looking into are Virgin Atlantic and Scandinavian Airlines, starting at £345 and £359 round-trip. Users have found that Icelandair is 38% 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?

    £310 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 £328 and £336, 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 SWISS (88%), Austrian Airlines (87%) and Air Canada (87%).

  • 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 £1,091, our data shows the cheapest flight currently is £339. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £323 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 £354). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £501). 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 22 January 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£334Average£463FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£345Average£501FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£359Average£482FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£366Average£627FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£385Average£615FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£386Average£538FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£394Average£575FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£401Average£572FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£401Average£609FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£408Average£551FlexibilityNo 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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