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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 394

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
4 May — 11 May1
1 adult

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

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 29 April 2025.

Round-trip from

C$ 844

One-way from

C$ 394

Popular in

June

Cheapest in

October

Average price

C$ 937

Good round-trip deal

C$ 1,427 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 20/10-25/10
  • 2 total stops
  • 47h 10m total
  • Chicago to London
Search Deals
Icelandair
  • Icelandair
  • 7/5
  • 1 total stop
  • 16h 05m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 335 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
Search Deals

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 29 April 2025.

Mon 20/107:15 p.m.ORD - LHR
1 stop16h 25mScandinavian Airlines
Sat 25/105:00 p.m.LHR - ORD
1 stop30h 45mScandinavian Airlines
Deal found 28/4C$ 844
Wed 24/97:59 p.m.ORD - LHR
1 stop11h 11mDelta
Fri 17/109:40 a.m.LHR - ORD
1 stop14h 05mDelta
Deal found 29/4C$ 853
Wed 15/107:25 p.m.ORD - LHR
1 stop10h 30mIcelandair
Sun 2/1112:15 p.m.LHR - ORD
1 stop11h 05mIcelandair
Deal found 28/4C$ 890
Tue 6/55:40 p.m.ORD - LHR
Nonstop7h 40mFinnair
Tue 13/511:05 a.m.LHR - ORD
Nonstop8h 45mFinnair
Deal found 29/4C$ 894
Wed 24/98:40 a.m.ORD - LHR
1 stop15h 50mJetBlue
Thu 2/108:25 a.m.LHR - ORD
1 stop15h 10mJetBlue
Deal found 28/4C$ 898
Sun 17/89:25 p.m.ORD - LHR
Nonstop8h 20mUnited Airlines
Fri 29/88:40 a.m.LHR - ORD
1 stop13h 15mUnited Airlines
Deal found 29/4C$ 916
Mon 12/59:20 p.m.ORD - LHR
Nonstop8h 25mMultiple Airlines
Tue 20/58:45 a.m.LHR - ORD
1 stop13h 10mMultiple Airlines
Deal found 28/4C$ 918
Sun 19/106:00 p.m.ORD - LHR
1 stop22h 55mTAP AIR PORTUGAL
Tue 28/106:30 p.m.LHR - ORD
1 stop26h 30mTAP AIR PORTUGAL
Deal found 29/4C$ 923
Tue 29/410:20 p.m.ORD - LHR
Nonstop7h 55mBritish Airways
Tue 6/512:15 p.m.LHR - ORD
Nonstop8h 25mBritish Airways
Deal found 29/4C$ 950
Wed 24/912:50 p.m.ORD - LHR
2 stops37h 55mAustrian Airlines
Fri 17/106:00 a.m.LHR - ORD
1 stop13h 20mAustrian Airlines
Deal found 29/4C$ 966
Wed 15/103:35 p.m.ORD - LHR
1 stop15h 15mLufthansa
Mon 27/108:15 p.m.LHR - ORD
1 stop28h 10mLufthansa
Deal found 28/4C$ 968
Fri 17/107:05 p.m.ORD - LHR
1 stop16h 45mSWISS
Thu 23/106:00 a.m.LHR - ORD
1 stop12h 10mSWISS
Deal found 29/4C$ 1,013

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 29 April 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

7:15 p.m.-5:40 p.m.

1 stop16h 25m

London Heathrow

Sat 25/10

5:00 p.m.-5:45 p.m.

1 stop30h 45m

C$ 844

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 24/9

7:59 p.m.-1:10 p.m.

1 stop11h 11m

London Heathrow

Fri 17/10

9:40 a.m.-5:45 p.m.

1 stop14h 05m

C$ 853

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 15/10

7:25 p.m.-11:55 a.m.

1 stop10h 30m

London Heathrow

Sun 2/11

12:15 p.m.-5:20 p.m.

1 stop11h 05m

C$ 890

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 18/8

5:45 p.m.-7:20 a.m.

Nonstop7h 35m

London Heathrow

Thu 28/8

7:30 a.m.-5:50 p.m.

1 stop16h 20m

C$ 896

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 24/9

8:40 a.m.-6:30 a.m.

1 stop15h 50m

London Heathrow

Tue 7/10

11:55 a.m.-8:54 p.m.

1 stop14h 59m

C$ 898

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 17/8

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

Nonstop8h 20m

London Heathrow

Tue 26/8

8:45 a.m.-3:55 p.m.

1 stop13h 10m

C$ 916

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/5

9:20 p.m.-11:45 a.m.

Nonstop8h 25m

London Heathrow

Tue 20/5

8:45 a.m.-3:55 p.m.

1 stop13h 10m

C$ 918

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 19/10

6:00 p.m.-10:55 p.m.

1 stop22h 55m

London Heathrow

Tue 28/10

6:30 p.m.-4:00 p.m.

1 stop26h 30m

C$ 923

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 24/9

12:50 p.m.-8:45 a.m.

2 stops37h 55m

London Heathrow

Fri 17/10

6:00 a.m.-1:20 p.m.

1 stop13h 20m

C$ 966

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 15/10

3:35 p.m.-12:50 p.m.

1 stop15h 15m

London Heathrow

Mon 27/10

8:15 p.m.-7:25 p.m.

1 stop28h 10m

C$ 968

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 21 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 25 April 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$ 870). 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 29 April 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 31% 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 29 April 2025.

The most flights from ORD to LHR are scheduled on a Wednesday (60 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (56 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 29 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair 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
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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$ 844, Scandinavian Airlines will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Scandinavian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Icelandair - these airlines can fly you to your destination from C$ 853 and C$ 890, respectively. Scandinavian Airlines is priced at 22% 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$ 394. JetBlue flights start at C$ 476 while deals on British Airways start at C$ 565 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 (88%), Gulf Air (82%) and Malaysia Airlines (79%).

  • 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$ 1,532, our data indicates the cheapest price to be C$ 1,207. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 1,690.

  • 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$ 870). 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
Hounslow
Sutton
Slough
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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