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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 376

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
24 Feb — 3 Mar1
1 adult

The best prices from Chicago O'Hare Intl to London Heathrow are usually found in October or February, booked 22 days in advance, depart on a Sunday or Tuesday and return on a Monday

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 19 February 2025.

Round-trip from

C$ 832

One-way from

C$ 376

Popular in

June

Cheapest in

October

Average price

C$ 951

Good round-trip deal

C$ 841 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 22/4-30/4
  • 4 total stops
  • 41h 30m total
  • Chicago to London
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Icelandair
  • Icelandair
  • 2/4
  • 1 total stop
  • 18h 50m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 405 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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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 19 February 2025.

Tue 22/47:15 p.m.ORD - LHR
2 stops15h 10mScandinavian Airlines
Wed 30/47:50 p.m.LHR - ORD
2 stops26h 20mScandinavian Airlines
Deal found 19/2C$ 832
Tue 22/410:20 p.m.ORD - LHR
Nonstop7h 55mFinnair
Wed 30/47:30 a.m.LHR - ORD
1 stop16h 20mFinnair
Deal found 19/2C$ 843
Tue 18/34:55 p.m.ORD - LHR
1 stop10h 10mAer Lingus
Tue 8/41:25 p.m.LHR - ORD
1 stop11h 35mAer Lingus
Deal found 19/2C$ 847
Wed 19/27:15 p.m.ORD - LHR
1 stop14h 15mTAP AIR PORTUGAL
Tue 18/36:30 p.m.LHR - ORD
1 stop27h 00mTAP AIR PORTUGAL
Deal found 19/2C$ 862
Sun 9/36:50 p.m.ORD - LHR
Nonstop8h 05mUnited Airlines
Tue 18/38:55 a.m.LHR - ORD
1 stop13h 20mUnited Airlines
Deal found 19/2C$ 870
Fri 25/47:30 p.m.ORD - LHR
1 stop10h 25mIcelandair
Mon 28/49:25 p.m.LHR - ORD
1 stop26h 55mIcelandair
Deal found 19/2C$ 877
Wed 5/32:00 p.m.ORD - LHR
1 stop14h 30mDelta
Mon 10/36:30 a.m.LHR - ORD
1 stop14h 00mDelta
Deal found 19/2C$ 883
Mon 22/98:40 a.m.ORD - LHR
1 stop15h 50mJetBlue
Wed 8/108:25 a.m.LHR - ORD
1 stop15h 05mJetBlue
Deal found 18/2C$ 906
Mon 21/44:55 p.m.ORD - LHR
Nonstop7h 55mBritish Airways
Fri 2/51:10 p.m.LHR - ORD
Nonstop8h 45mBritish Airways
Deal found 19/2C$ 940
Wed 5/39:25 p.m.ORD - LHR
1 stop12h 25mLufthansa
Tue 18/36:30 a.m.LHR - ORD
2 stops16h 57mLufthansa
Deal found 18/2C$ 964
Tue 4/31:40 p.m.ORD - LHR
1 stop11h 10mKLM
Mon 17/38:40 a.m.LHR - ORD
1 stop11h 50mKLM
Deal found 18/2C$ 986
Sun 9/38:05 p.m.ORD - LHR
2 stops17h 35mSWISS
Mon 17/37:30 p.m.LHR - ORD
2 stops26h 45mSWISS
Deal found 19/2C$ 989

Find flights from O'Hare Intl to Heathrow within your budget

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 19 February 2025.

Fly from

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

7:15 p.m.-4:25 p.m.

2 stops15h 10m

London Heathrow

Wed 30/4

7:50 p.m.-4:10 p.m.

2 stops26h 20m

C$ 832

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 22/4

10:20 p.m.-12:15 p.m.

Nonstop7h 55m

London Heathrow

Wed 30/4

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

1 stop16h 20m

C$ 843

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/3

4:55 p.m.-8:05 a.m.

1 stop10h 10m

London Heathrow

Tue 8/4

1:25 p.m.-7:00 p.m.

1 stop11h 35m

C$ 847

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/3

6:50 p.m.-7:55 a.m.

Nonstop8h 05m

London Heathrow

Tue 18/3

8:55 a.m.-5:15 p.m.

1 stop13h 20m

C$ 870

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 25/4

7:30 p.m.-11:55 a.m.

1 stop10h 25m

London Heathrow

Mon 28/4

9:25 p.m.-6:20 p.m.

1 stop26h 55m

C$ 877

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/3

2:00 p.m.-10:30 a.m.

1 stop14h 30m

London Heathrow

Mon 10/3

6:30 a.m.-3:30 p.m.

1 stop14h 00m

C$ 883

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 21/4

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

Nonstop7h 55m

London Heathrow

Fri 2/5

1:10 p.m.-3:55 p.m.

Nonstop8h 45m

C$ 940

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 3/4

1:24 p.m.-9:30 a.m.

1 stop14h 06m

London Heathrow

Thu 10/4

8:25 a.m.-6:07 p.m.

1 stop15h 42m

C$ 950

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 5/3

9:25 p.m.-3:50 p.m.

1 stop12h 25m

London Heathrow

Tue 18/3

6:30 a.m.-6:27 p.m.

2 stops16h 57m

C$ 964

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/3

1:40 p.m.-6:50 a.m.

1 stop11h 10m

London Heathrow

Mon 17/3

8:40 a.m.-3:30 p.m.

1 stop11h 50m

C$ 986

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 24 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.

Travel insights for flights from O'Hare Intl to Heathrow

Get recent, data-driven insights about flights from O'Hare Intl to Heathrow including ideal travel times, pricing trends, and more.

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 14 February 2025.

Booking 22 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$ 874). 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 19 February 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 33% 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 19 February 2025.

The most flights from ORD to LHR are scheduled on a Monday (38 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (35 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 19 February 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
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
8,236 reviews
Delta
8.0
Very good
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
1,333 reviews
Delta
8.0
Very good
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
1,274 reviews
Delta
8.0
Very good
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
774 reviews
Delta
8.0
Very good
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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
1,568 reviews
Delta
8.0
Very good
8,236 reviews
Check prices

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

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$ 832, 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 Finnair and Aer Lingus - these airlines can fly you to your destination from C$ 843 and C$ 847, respectively. Scandinavian Airlines is priced at 26% 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$ 376. JetBlue flights start at C$ 382 while deals on British Airways start at C$ 575 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 Aer Lingus (80%), Air Canada (74%) and Austrian Airlines (74%).

  • 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$ 853, our data indicates the cheapest price to be C$ 771. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around C$ 944.

  • 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$ 874). 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
Slough
Luton
Milton Keynes
Romford
Watford
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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