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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 513

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
20 Jun — 27 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 15 June 2025.

Round-trip from

C$ 907

One-way from

C$ 513

Popular in

June

Cheapest in

February

Average price

C$ 1,667

Good round-trip deal

C$ 839 or less
JetBlue
  • JetBlue
  • 20/10-23/10
  • 2 total stops
  • 30h 18m total
  • Chicago to London
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Icelandair
  • Icelandair
  • 6/7
  • 1 total stop
  • 31h 40m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 384 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 72 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 15 June 2025.

Mon 20/109:42 a.m.ORD - LHR
1 stop14h 48mJetBlue
Thu 23/108:25 a.m.LHR - ORD
1 stop15h 30mJetBlue
Deal found 14/6C$ 907
Mon 4/84:05 p.m.ORD - LHR
Nonstop8h 15mUnited Airlines
Wed 13/810:50 a.m.LHR - ORD
1 stop33h 10mUnited Airlines
Deal found 14/6C$ 908
Sun 31/85:00 p.m.ORD - LHR
1 stop9h 55mDelta
Tue 9/129:00 a.m.LHR - ORD
1 stop12h 10mDelta
Deal found 13/6C$ 910
Tue 29/77:05 p.m.ORD - LHR
1 stop11h 55mSWISS
Mon 11/88:05 p.m.LHR - ORD
1 stop25h 50mSWISS
Deal found 13/6C$ 917
Wed 6/84:55 p.m.ORD - LHR
Nonstop7h 55mFinnair
Wed 13/812:15 p.m.LHR - ORD
Nonstop8h 25mFinnair
Deal found 13/6C$ 919
Sun 27/72:10 p.m.ORD - LHR
1 stop11h 55mVirgin Atlantic
Tue 5/88:10 p.m.LHR - ORD
1 stop19h 41mVirgin Atlantic
Deal found 13/6C$ 936
Sun 14/97:15 p.m.ORD - LHR
2 stops15h 45mScandinavian Airlines
Tue 30/96:40 a.m.LHR - ORD
2 stops21h 22mScandinavian Airlines
Deal found 14/6C$ 938
Mon 1/94:55 p.m.ORD - LHR
Nonstop7h 55mBritish Airways
Tue 9/1211:00 a.m.LHR - ORD
Nonstop8h 55mBritish Airways
Deal found 13/6C$ 948
Thu 7/86:05 p.m.ORD - LHR
Nonstop8h 15mMultiple Airlines
Mon 11/88:05 p.m.LHR - ORD
1 stop25h 50mMultiple Airlines
Deal found 15/6C$ 959
Tue 15/75:20 p.m.ORD - LHR
1 stop9h 35mKLM
Fri 15/89:20 a.m.LHR - ORD
1 stop13h 08mKLM
Deal found 15/6C$ 967
Mon 14/76:10 p.m.ORD - LHR
1 stop12h 35mTAP AIR PORTUGAL
Mon 15/98:00 a.m.LHR - ORD
1 stop14h 40mTAP AIR PORTUGAL
Deal found 14/6C$ 1,016
Thu 25/129:50 p.m.ORD - LHR
1 stop14h 45mLufthansa
Mon 5/15:50 p.m.LHR - ORD
1 stop30h 35mLufthansa
Deal found 14/6C$ 1,108

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 15 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

Mon 20/10

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

1 stop14h 48m

London Heathrow

Thu 23/10

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

1 stop15h 30m

C$ 907

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 4/8

4:05 p.m.-6:20 a.m.

Nonstop8h 15m

London Heathrow

Wed 13/8

10:50 a.m.-2:00 p.m.

1 stop33h 10m

C$ 908

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 31/8

5:00 p.m.-8:55 a.m.

1 stop9h 55m

London Heathrow

Tue 9/12

9:00 a.m.-3:10 p.m.

1 stop12h 10m

C$ 910

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 29/7

7:05 p.m.-1:00 p.m.

1 stop11h 55m

London Heathrow

Mon 11/8

8:05 p.m.-3:55 p.m.

1 stop25h 50m

C$ 917

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 6/8

4:55 p.m.-6:50 a.m.

Nonstop7h 55m

London Heathrow

Wed 13/8

12:15 p.m.-2:40 p.m.

Nonstop8h 25m

C$ 919

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 27/7

2:10 p.m.-8:05 a.m.

1 stop11h 55m

London Heathrow

Tue 5/8

8:10 p.m.-9:51 a.m.

1 stop19h 41m

C$ 936

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 14/9

7:15 p.m.-5:00 p.m.

2 stops15h 45m

London Heathrow

Tue 30/9

6:40 a.m.-10:02 p.m.

2 stops21h 22m

C$ 938

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 1/9

4:55 p.m.-6:50 a.m.

Nonstop7h 55m

London Heathrow

Tue 9/12

11:00 a.m.-1:55 p.m.

Nonstop8h 55m

C$ 948

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 7/8

6:05 p.m.-8:20 a.m.

Nonstop8h 15m

London Heathrow

Mon 11/8

8:05 p.m.-3:55 p.m.

1 stop25h 50m

C$ 959

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 15/7

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

1 stop9h 35m

London Heathrow

Fri 15/8

9:20 a.m.-4:28 p.m.

1 stop13h 08m

C$ 967

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/6

Showing 1-10 of 20 results
1
2

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 15 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 15 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 15 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
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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
1,361 reviews
Delta
8.0
Very good
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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
803 reviews
Delta
8.0
Very good
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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
1,627 reviews
Delta
8.0
Very good
7,961 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

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$ 907, JetBlue will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from C$ 908 and C$ 910, respectively. JetBlue 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 Icelandair, which is currently one of the cheapest options available, starting at C$ 513. United Airlines flights start at C$ 527 while deals on American Airlines start at C$ 530 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$ 1,275, our data indicates the cheapest price to be C$ 839. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 1,275.

  • 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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