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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £388

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 27/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
9 Jul — 16 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in February or September, booked 85 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 4 July 2025.

Round-trip from

£407

One-way from

£388

Popular in

July

Cheapest in

February

Average price

£688

Good round-trip deal

£514 or less

Good one-way deal

£551 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 20/8-25/8
  • 2 total stops
  • 45h 40m total
  • London to Chicago
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27/8
  • 27/8
  • 2 total stops
  • 18h 00m total
  • London to Chicago
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Highest demand for flights based on searches. 14% potential increase in price (£67 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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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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Find flight deals from Heathrow to O'Hare Intl

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 4 July 2025.

Wed 20/818:45LHR - ORD
1 stop23h 50mTAP AIR PORTUGAL
Mon 25/818:10ORD - LHR
1 stop21h 50mTAP AIR PORTUGAL
Deal found 1/7£407
Sat 13/919:30LHR - ORD
1 stop23h 50mAustrian Airlines
Tue 23/916:00ORD - LHR
Nonstop8h 20mAustrian Airlines
Deal found 3/7£410
Mon 1/909:50LHR - ORD
1 stop11h 55mBritish Airways
Tue 16/922:35ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 3/7£410
Thu 25/906:00LHR - ORD
1 stop13h 20mMultiple Airlines
Mon 29/921:25ORD - LHR
Nonstop8h 20mMultiple Airlines
Deal found 2/7£411
Mon 24/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sat 29/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/7£413
Thu 9/1007:30LHR - ORD
1 stop13h 25mLufthansa
Mon 13/1005:01ORD - LHR
1 stop22h 39mLufthansa
Deal found 2/7£415
Wed 10/908:40LHR - ORD
1 stop13h 15mUnited Airlines
Wed 17/910:35ORD - LHR
1 stop13h 20mUnited Airlines
Deal found 2/7£421
Sun 24/820:05LHR - ORD
1 stop22h 05mSWISS
Tue 9/919:05ORD - LHR
1 stop15h 20mSWISS
Deal found 3/7£423
Sat 8/1106:50LHR - ORD
2 stops14h 05mAir Canada
Sat 15/1113:59ORD - LHR
2 stops15h 21mAir Canada
Deal found 3/7£429
Tue 2/908:25LHR - ORD
1 stop13h 07mJetBlue
Tue 16/909:42ORD - LHR
1 stop14h 48mJetBlue
Deal found 2/7£440

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 4 July 2025.
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

Wed 20/8

18:45-12:35

1 stop23h 50m

Chicago O'Hare Intl

Mon 25/8

18:10-22:00

1 stop21h 50m

£407

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 13/9

19:30-13:20

1 stop23h 50m

Chicago O'Hare Intl

Tue 23/9

16:00-06:20

Nonstop8h 20m

£410

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/9

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Tue 16/9

22:35-12:15

Nonstop7h 40m

£410

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/9

06:00-13:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 29/9

21:25-11:45

Nonstop8h 20m

£411

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 24/11

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sat 29/11

19:20-16:00

1 stop14h 40m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/10

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

Mon 13/10

05:01-09:40

1 stop22h 39m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/9

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Wed 17/9

10:35-05:55

1 stop13h 20m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 24/8

20:05-12:10

1 stop22h 05m

Chicago O'Hare Intl

Tue 9/9

19:05-16:25

1 stop15h 20m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 8/11

06:50-14:55

2 stops14h 05m

Chicago O'Hare Intl

Sat 15/11

13:59-11:20

2 stops15h 21m

£429

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/9

08:25-15:32

1 stop13h 07m

Chicago O'Hare Intl

Tue 16/9

09:42-06:30

1 stop14h 48m

£440

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 16 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 27 June 2025.

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 85 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £595). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport 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 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 4 July 2025.

It’s typically best to fly out from London Heathrow Airport to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly return from Heathrow to O'Hare Intl. Price data was last updated on 29 June 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Chicago O'Hare Intl Airport flight should consider departing on Monday 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 O'Hare Intl Airport

Explore weekly flight availability from Heathrow to O'Hare Intl. 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 4 July 2025.

The most flights from LHR to ORD are scheduled on a Wednesday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).

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 4 July 2025.
Check out reviews from past customers who have flown with Austrian Airlines, SWISS, andUnited Airlines 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.
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
809 reviews
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
SWISS
7.5
Good
1,654 reviews
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
United Airlines
7.4
Good
8,844 reviews
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
JetBlue
7.3
Good
2,916 reviews
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Scandinavian Airlines
7.3
Good
1,410 reviews
Austrian Airlines
7.6
Good
809 reviews
Check prices

Boarding

7.6

Entertainment

6.8

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

  • 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 TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £407 on this airline. Additional options worth looking into are Austrian Airlines and British Airways, starting at £410 and £410 round-trip. Users have found that TAP AIR PORTUGAL is 24% 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?

    £391 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on JetBlue and Scandinavian Airlines, with prices starting from £392 and £405, 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 (89%), Austrian Airlines (89%) and United Airlines (89%).

  • 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 £1,751, our data shows the cheapest flight currently is £376. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £366 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £595). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Downers Grove
Elk Grove Village
Beloit
Rosemont

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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 4 July 2025.
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 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£338Average£465FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£348Average£495FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£361Average£605FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£379Average£508FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£388Average£611FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£393Average£567FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£395Average£574FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£397Average£557FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£398Average£626FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£401Average£561FlexibilityNo cancel feeOn-time70%
Search British Airways 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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