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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 529

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 55 days in advance, depart on a Wednesday or Sunday and return on a Saturday

Cheap flight deals from O'Hare Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). 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 12 June 2025.

Round-trip from

C$ 916

One-way from

C$ 529

Popular in

June

Cheapest in

February

Average price

C$ 1,679

Good round-trip deal

C$ 845 or less
Delta
  • Delta
  • 3/8-12/8
  • 2 total stops
  • 23h 01m total
  • Chicago to London
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British Airways
  • British Airways
  • 4/8
  • Nonstop
  • 7h 55m total
  • Chicago to London
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Highest demand for flights based on searches. 20% potential increase in price (C$ 389 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 74 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
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Find flight deals from O'Hare Intl to Heathrow

Cheapest flights from O'Hare Intl to Heathrow
Explore the most affordable flight options available from O'Hare Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 June 2025.

Sun 3/86:24 p.m.ORD - LHR
1 stop11h 01mDelta
Tue 12/89:00 a.m.LHR - ORD
1 stop12h 00mDelta
Deal found 12/6C$ 916
Thu 11/97:15 p.m.ORD - LHR
1 stop20h 25mScandinavian Airlines
Sat 20/95:30 p.m.LHR - ORD
2 stops52h 40mScandinavian Airlines
Deal found 12/6C$ 919
Tue 14/109:40 p.m.ORD - LHR
1 stop12h 00mLufthansa
Mon 27/107:30 p.m.LHR - ORD
1 stop23h 40mLufthansa
Deal found 12/6C$ 920
Sun 20/79:25 p.m.ORD - LHR
Nonstop8h 20mUnited Airlines
Tue 29/78:30 a.m.LHR - ORD
Nonstop8h 55mUnited Airlines
Deal found 11/6C$ 922
Sun 20/75:40 p.m.ORD - LHR
Nonstop7h 40mBritish Airways
Tue 29/72:25 p.m.LHR - ORD
Nonstop8h 35mBritish Airways
Deal found 12/6C$ 924
Sun 2/117:05 p.m.ORD - LHR
2 stops20h 20mSWISS
Fri 14/118:55 a.m.LHR - ORD
1 stop13h 20mSWISS
Deal found 12/6C$ 926
Tue 29/75:20 p.m.ORD - LHR
1 stop9h 35mKLM
Wed 6/89:20 a.m.LHR - ORD
1 stop13h 36mKLM
Deal found 12/6C$ 941
Sun 20/71:30 p.m.ORD - LHR
1 stop14h 45mVirgin Atlantic
Tue 29/79:40 a.m.LHR - ORD
1 stop18h 23mVirgin Atlantic
Deal found 11/6C$ 942
Sun 28/99:42 a.m.ORD - LHR
1 stop14h 48mJetBlue
Wed 1/108:25 a.m.LHR - ORD
1 stop15h 30mJetBlue
Deal found 11/6C$ 952
Fri 26/94:20 p.m.ORD - LHR
1 stop16h 00mAustrian Airlines
Mon 6/107:30 p.m.LHR - ORD
1 stop23h 50mAustrian Airlines
Deal found 11/6C$ 965
Fri 25/78:45 a.m.ORD - LHR
1 stop18h 55mMultiple Airlines
Mon 11/88:05 p.m.LHR - ORD
1 stop22h 05mMultiple Airlines
Deal found 11/6C$ 971
Sat 9/810:15 p.m.ORD - LHR
1 stop31h 40mIcelandair
Sun 17/89:25 p.m.LHR - ORD
1 stop26h 50mIcelandair
Deal found 12/6C$ 978

Cheapflights Fare Finder

Customize your flight search to find flights from O'Hare Intl to Heathrow 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 629,999 searches. Data last updated 12 June 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 3/8

6:24 p.m.-11:25 a.m.

1 stop11h 01m

London Heathrow

Tue 12/8

9:00 a.m.-3:00 p.m.

1 stop12h 00m

C$ 916

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 11/9

7:15 p.m.-9:40 p.m.

1 stop20h 25m

London Heathrow

Sat 20/9

5:30 p.m.-4:10 p.m.

2 stops52h 40m

C$ 919

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 14/10

9:40 p.m.-3:40 p.m.

1 stop12h 00m

London Heathrow

Mon 27/10

7:30 p.m.-2:10 p.m.

1 stop23h 40m

C$ 920

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 20/7

9:25 p.m.-11:45 a.m.

Nonstop8h 20m

London Heathrow

Tue 29/7

8:30 a.m.-11:25 a.m.

Nonstop8h 55m

C$ 922

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 20/7

5:40 p.m.-7:20 a.m.

Nonstop7h 40m

London Heathrow

Tue 29/7

2:25 p.m.-5:00 p.m.

Nonstop8h 35m

C$ 924

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 2/11

7:05 p.m.-4:40 p.m.

2 stops15h 35m

London Heathrow

Tue 11/11

6:00 a.m.-4:15 p.m.

1 stop16h 15m

C$ 926

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 29/7

5:20 p.m.-8:55 a.m.

1 stop9h 35m

London Heathrow

Wed 6/8

9:20 a.m.-4:56 p.m.

1 stop13h 36m

C$ 941

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 20/7

1:30 p.m.-10:15 a.m.

1 stop14h 45m

London Heathrow

Tue 29/7

9:40 a.m.-10:03 p.m.

1 stop18h 23m

C$ 942

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 28/9

9:42 a.m.-6:30 a.m.

1 stop14h 48m

London Heathrow

Wed 1/10

8:25 a.m.-5:55 p.m.

1 stop15h 30m

C$ 952

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 26/9

4:20 p.m.-2:20 p.m.

1 stop16h 00m

London Heathrow

Mon 6/10

7:30 p.m.-1:20 p.m.

1 stop23h 50m

C$ 965

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 27 results
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Best time to book a flight from O'Hare Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from O'Hare Intl with our price prediction graph.
Estimated round-trip 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 Chicago O'Hare Intl Airport to London Heathrow Airport

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Heathrow. Price data was last updated on 9 June 2025.

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 560). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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 ORD to LHR?

Find hourly flight availability from O'Hare Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 June 2025.

When flying from Chicago O'Hare Intl Airport to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 41% versus a flight in the afternoon.

Weekly flight availability from Chicago O'Hare Intl Airport to London Heathrow Airport

Explore weekly flight availability from O'Hare Intl to Heathrow. 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 12 June 2025.

The most flights from ORD to LHR are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (52 on average).

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 12 June 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Chicago to London to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Heathrow. 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 Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?

    Currently priced at C$ 916, Delta will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and Lufthansa - these airlines can fly you to your destination from C$ 919 and C$ 920, respectively. Delta is priced at 16% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at C$ 529. United Airlines flights start at C$ 530 while deals on Icelandair start at C$ 555 one-way.

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

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to London Heathrow Airport are Royal Jordanian (81%), SriLankan Airlines (75%) and Air Canada (72%).

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

    Looking for the cheapest flight from Chicago O'Hare Intl Airport to London Heathrow Airport? While on average our users pay C$ 1,218, our data indicates the cheapest price to be C$ 845. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 1,284.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 560). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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
Brentford
Sutton
Hounslow
Slough
Leamington Spa
Milton Keynes
Romford
Watford
Luton
Bromley
Bedford
Southall

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Certainly. Search results for flights to Heathrow from O'Hare Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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