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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £318

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
25 Mar — 1 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in February or April, booked 80 days in advance, depart on a Tuesday or Wednesday 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 20 March 2025.

Round-trip from

£414

One-way from

£318

Popular in

July

Cheapest in

February

Average price

£537

Good round-trip deal

£561 or less

Good one-way deal

£582 or less
Icelandair
  • Icelandair
  • 21/4-25/4
  • 2 total stops
  • 42h 55m total
  • London to Chicago
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22/5
  • 22/5
  • 2 total stops
  • 39h 30m total
  • London to Chicago
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Highest demand for flights based on searches. 13% potential increase in price (£70 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 March 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 20 March 2025.

Thu 27/306:00LHR - ORD
1 stop12h 55mSWISS
Sun 30/315:45ORD - LHR
1 stop21h 35mSWISS
Deal found 19/3£414
Wed 23/408:40LHR - ORD
1 stop13h 15mUnited Airlines
Tue 13/508:50ORD - LHR
1 stop16h 05mUnited Airlines
Deal found 20/3£414
Sun 20/406:30LHR - ORD
1 stop14h 15mLufthansa
Fri 9/521:20ORD - LHR
Nonstop8h 25mLufthansa
Deal found 19/3£416
Tue 29/421:25LHR - ORD
1 stop26h 50mIcelandair
Fri 18/719:25ORD - LHR
1 stop10h 30mIcelandair
Deal found 19/3£417
Sat 19/412:15LHR - ORD
Nonstop8h 30mFinnair
Fri 2/522:20ORD - LHR
Nonstop7h 55mFinnair
Deal found 20/3£420
Sat 26/412:15LHR - ORD
Nonstop8h 30mBritish Airways
Thu 1/522:20ORD - LHR
Nonstop7h 55mBritish Airways
Deal found 19/3£424
Wed 23/406:50LHR - ORD
2 stops14h 05mAir Canada
Sat 3/515:35ORD - LHR
1 stop12h 25mAir Canada
Deal found 20/3£425
Sat 3/506:30LHR - ORD
1 stop12h 25mMultiple Airlines
Tue 13/517:50ORD - LHR
1 stop10h 25mMultiple Airlines
Deal found 19/3£426
Wed 23/411:45LHR - ORD
2 stops18h 14mVirgin Atlantic
Sun 18/518:18ORD - LHR
1 stop11h 07mVirgin Atlantic
Deal found 19/3£427
Thu 8/510:20LHR - ORD
1 stop13h 30mAmerican Airlines
Thu 22/516:44ORD - LHR
1 stop12h 31mAmerican Airlines
Deal found 19/3£437
Wed 23/406:50LHR - ORD
1 stop11h 10mBrussels Airlines
Sat 10/515:45ORD - LHR
1 stop14h 35mBrussels Airlines
Deal found 20/3£440
Wed 26/308:40LHR - ORD
1 stop11h 50mDelta
Fri 19/918:10ORD - LHR
1 stop11h 15mDelta
Deal found 19/3£441

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 20 March 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

Mon 21/4

21:25-18:15

1 stop26h 50m

Chicago O'Hare Intl

Fri 25/4

22:15-20:20

1 stop16h 05m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Tue 13/5

08:50-06:55

1 stop16h 05m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/4

06:30-14:45

1 stop14h 15m

Chicago O'Hare Intl

Fri 9/5

21:20-11:45

Nonstop8h 25m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 19/4

12:15-14:45

Nonstop8h 30m

Chicago O'Hare Intl

Fri 2/5

22:20-12:15

Nonstop7h 55m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 26/4

12:15-14:45

Nonstop8h 30m

Chicago O'Hare Intl

Thu 1/5

22:20-12:15

Nonstop7h 55m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

06:50-14:55

2 stops14h 05m

Chicago O'Hare Intl

Sat 3/5

15:35-10:00

1 stop12h 25m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 3/5

06:30-12:55

1 stop12h 25m

Chicago O'Hare Intl

Tue 13/5

17:50-10:15

1 stop10h 25m

£426

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

11:45-23:59

2 stops18h 14m

Chicago O'Hare Intl

Sun 18/5

18:18-11:25

1 stop11h 07m

£427

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/5

10:20-17:50

1 stop13h 30m

Chicago O'Hare Intl

Thu 22/5

16:44-11:15

1 stop12h 31m

£437

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

06:50-12:00

1 stop11h 10m

Chicago O'Hare Intl

Sat 10/5

15:45-12:20

1 stop14h 35m

£440

Flights are sorted by cheapest return flights first.

Deals found on 19/3

Showing 1-10 of 22 results
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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 14 March 2025.

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 80 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 20 March 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 12% 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 16 March 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 20 March 2025.

The most flights from LHR to ORD are scheduled on a Monday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 20 March 2025.
See what other customers who have flown with Delta, Finnair and Austrian Airlines from London to Chicago have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,895 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
768 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,567 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 Icelandair. Our recent data shows that you can find tickets from as low as £414 on this airline. Additional options worth looking into are United Airlines and Lufthansa, starting at £414 and £416 round-trip. Users have found that Icelandair is 27% 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?

    £330 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on TAP AIR PORTUGAL and Icelandair, with prices starting from £340 and £365, 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 (93%), Austrian Airlines (93%) and United Airlines (93%).

  • 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 £1,789, our data shows the cheapest flight currently is £433. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £342 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
Evanston
Downers Grove
Schaumburg
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 20 March 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 20 March 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£358Average£521FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£365Average£517FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£380Average£606FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£422Average£579FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£422Average£585FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Virgin AtlanticCheapest£427Average£564FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£428Average£599FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£432Average£592FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£447Average£586FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£465Average£638FlexibilityNo cancel feeOn-time71%
Search American 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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