Which airline has the best punctuality record on London to Chicago flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

What is the most punctual flight time for London to Chicago flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

What’s the fastest stopover option from London Heathrow Airport to Chicago O'Hare Intl Airport?

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 30m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Flights via Helsinki (HEL) offer the fastest connection on this route, with an average stopover time of 1h 15m.

What’s the top stopover airport for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 44% of one-stop itineraries from London Heathrow Airport to Chicago O'Hare Intl Airport on Cheapflights.

How often are flights from London to Chicago delayed?

About 10% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 169 minutes.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £377.

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 Virgin Atlantic. Our recent data shows that you can find tickets from as low as £347 on this airline. Additional options worth looking into are Icelandair and Aer Lingus, starting at £356 and £366 round-trip. Users have found that Virgin Atlantic is 37% 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?

£312 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Icelandair and Brussels Airlines, with prices starting from £327 and £380, respectively.

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.

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).

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 £1,218, our data shows the cheapest flight currently is £371. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £416 for that flight.

What are the most popular airlines that fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

The most popular airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport are British Airways, Lufthansa and United Airlines. Something to consider prior to booking your 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.

£357+ Cheap Flights from London Heathrow Airport to Chicago O'Hare Intl Airport

Q: How much does it cost for a return flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Airfare is below average for this route at the moment. London Heathrow Airport to Chicago O'Hare Intl Airport flights typically cost between £642 and £462 in June. The cheapest return flight price found within the last 3 days was £455 on United Airlines (6 Jun-7 Jun).

Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in September or February, booked 58 days in advance, depart on a Thursday or Wednesday and return on a Sunday

Cheap flight deals from Heathrow to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 27 March 2026.

Sat 6/614:10

LHR

ORD

1 stop23h 35m

United Airlines

Sun 7/616:30

ORD

LHR

Nonstop8h 15m

United Airlines

Deal found 22/3£455

Wed 3/613:05

LHR

ORD

1 stop11h 10m

Icelandair

Sun 7/619:25

ORD

LHR

1 stop10h 30m

Icelandair

Deal found 22/3£458

Mon 20/421:25

LHR

ORD

1 stop26h 50m

Icelandair

Thu 30/419:25

ORD

LHR

1 stop18h 55m

Icelandair

Deal found 23/3£458

Fri 1/521:25

LHR

ORD

1 stop26h 50m

Icelandair

Sun 10/522:25

ORD

LHR

1 stop15h 55m

Icelandair

Deal found 23/3£461

Wed 7/1006:40

LHR

ORD

1 stop15h 30m

Scandinavian Airlines

Wed 14/1019:15

ORD

LHR

1 stop17h 15m

Scandinavian Airlines

Deal found 22/3£462

Wed 6/513:05

LHR

ORD

1 stop11h 10m

Icelandair

Wed 13/522:25

ORD

LHR

1 stop15h 55m

Icelandair

Deal found 22/3£466

Thu 7/513:05

LHR

ORD

1 stop11h 10m

Icelandair

Mon 11/519:25

ORD

LHR

1 stop10h 30m

Icelandair

Deal found 23/3£467

Thu 7/513:05

LHR

ORD

1 stop11h 10m

Icelandair

Sun 10/519:25

ORD

LHR

1 stop10h 30m

Icelandair

Deal found 23/3£469

Find flight deals from Heathrow to O'Hare Intl

Round-trip from	£455
One-way from	£357
Popular in	July
Cheapest in	September
Average price	£635
Good round-trip deal	£607 or less
Good one-way deal	£451 or less

United Airlines
6/6-7/6
1 total stop
31h 50m total
London to Chicago

Search Deals

20/5
3 total stops
26h 55m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£43 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 2026

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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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Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 6/5

11:05-14:10

Nonstop9h 05m

Chicago O'Hare Intl

Wed 13/5

12:55-10:40

1 stop15h 45m

£599

Fastest return journey

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/4

11:05-14:10

Nonstop9h 05m

Chicago O'Hare Intl

Mon 4/5

21:40-11:55

Nonstop8h 15m

£599

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/4

06:00-12:35

1 stop12h 35m

Chicago O'Hare Intl

Mon 27/4

21:30-17:50

2 stops14h 20m

£602

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/4

08:40-18:13

2 stops15h 33m

Chicago O'Hare Intl

Mon 4/5

17:53-11:20

1 stop11h 27m

£606

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 30/6

21:25-21:25

1 stop30h 00m

Chicago O'Hare Intl

Thu 16/7

19:25-11:55

1 stop10h 30m

£607

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/9

06:30-16:36

2 stops16h 06m

Chicago O'Hare Intl

Wed 23/9

11:30-07:10

1 stop13h 40m

£608

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 27/4

14:10-17:20

Nonstop9h 10m

Chicago O'Hare Intl

Mon 11/5

16:25-06:45

Nonstop8h 20m

£620

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 10/5

09:05-13:20

1 stop34h 15m

Chicago O'Hare Intl

Sun 17/5

18:40-09:00

Nonstop8h 20m

£636

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 16/4

06:55-14:00

1 stop13h 05m

Chicago O'Hare Intl

Mon 20/4

16:25-06:45

Nonstop8h 20m

£644

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 21/5

06:40-16:10

2 stops15h 30m

Chicago O'Hare Intl

Thu 23/7

19:15-17:40

1 stop16h 25m

£665

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 22 resultsSorted by cheapest first

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.

LHR-ORD

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

Prices

Delays

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

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 58 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £357). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £494). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Chicago O'Hare Intl Airport as you normally would.

How much does it cost for a return flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Check out reviews from past customers who have flown with United Airlines,Aer Lingus, andIcelandair from London Heathrow Airport to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

United Airlines

7.4

Good

9,500 reviews

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

Aer Lingus

7.2

Good

1,491 reviews

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

Icelandair

7.0

Good

627 reviews

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

Lufthansa

6.8

Okay

7,871 reviews

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

British Airways

6.7

Okay

7,824 reviews

United Airlines

7.4

Good

9,500 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2025

YUL - ORD

Related info for your journey

How long is the flight from London Heathrow Airport to Chicago O'Hare Intl Airport?
Airlines like Austrian Airlines, SWISS, and Delta fly from London Heathrow Airport to Chicago O'Hare Intl Airport in about 9h 05m. The time it takes to get you to your destination can typically vary by up to 6h 28m. The distance from London Heathrow Airport to Chicago O'Hare Intl Airport is about 3939 mi. This flight may include one or multiple stops.
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 Virgin Atlantic. Our recent data shows that you can find tickets from as low as £347 on this airline. Additional options worth looking into are Icelandair and Aer Lingus, starting at £356 and £366 round-trip. Users have found that Virgin Atlantic is 37% 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?
£312 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Icelandair and Brussels Airlines, with prices starting from £327 and £380, 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 SWISS (93%), Air Canada (92%) and Austrian Airlines (92%).
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 £1,218, our data shows the cheapest flight currently is £371. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £416 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £357). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £494). 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.

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Fly from Heathrow to O'Hare Intl on these airlines

British Airways flights from London Heathrow to Chicago O'Hare Intl

Iberia flights from London Heathrow to Chicago O'Hare Intl

Finnair flights from London Heathrow to Chicago O'Hare Intl

Top 10 airlines flying from Heathrow to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£347	Average£533	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£356	Average£466	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£366	Average£637	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
TAP AIR PORTUGAL	Cheapest£372	Average£564	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Scandinavian Airlines	Cheapest£378	Average£515	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Brussels Airlines	Cheapest£397	Average£551	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Lufthansa	Cheapest£398	Average£595	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£400	Average£581	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Austrian Airlines	Cheapest£406	Average£628	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
United Airlines	Cheapest£413	Average£595	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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.

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Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £357

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to O'Hare Intl

Cheapest flights from Heathrow to O'Hare IntlExplore 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 27 March 2026.

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 27 March 2026.

Best flights from Heathrow to O'Hare IntlDiscover carefully curated flight deals from Heathrow to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 March 2026.

Discover carefully curated flight deals from Heathrow to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 March 2026.

Direct flights from Heathrow to O'Hare IntlExplore direct flight options from Heathrow to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 March 2026.

Explore direct flight options from Heathrow to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 March 2026.

Last-minute flights from Heathrow to O'Hare IntlDiscover last-minute flight deals from Heathrow to O'Hare Intl. Data last updated 27 March 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to O'Hare Intl. Data last updated 27 March 2026 and is based on user searches.

One-way flights from Heathrow to O'Hare IntlSearch for one-way flight options from Heathrow to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 27 March 2026.

Search for one-way flight options from Heathrow to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 27 March 2026.

Find flight deals from Heathrow to O'Hare Intl

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One-way from

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Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Chicago O'Hare Intl Airport that are best for you.

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.

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?

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

What is the cheapest time of day to fly from LHR to ORD?

How much does it cost for a return flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

How often are flights from London to Chicago delayed?

What is the most punctual flight time for London to Chicago flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to Chicago flights?

What’s the top stopover airport for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

What’s the cheapest stopover airport for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

What’s the fastest stopover option from London Heathrow Airport to Chicago O'Hare Intl Airport?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

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.

How long is the flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

What are the cheapest airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport round-trip?

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

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

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

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

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

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

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

Travelling to a place near Chicago O'Hare Intl Airport?

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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 27 March 2026.

Alternative routes for Heathrow to O'Hare Intl

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Complete your trip

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Direct flights to Illinois

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Other flights to O'Hare Intl

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Heathrow and O'Hare Intl flights

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Top 10 airlines flying from Heathrow to O'Hare Intl

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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 27 March 2026.

Best flights from Heathrow to O'Hare Intl
Discover carefully curated flight deals from Heathrow to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 March 2026.

Direct flights from Heathrow to O'Hare Intl
Explore direct flight options from Heathrow to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 March 2026.

Last-minute flights from Heathrow to O'Hare Intl
Discover last-minute flight deals from Heathrow to O'Hare Intl. Data last updated 27 March 2026 and is based on user searches.

One-way flights from Heathrow to O'Hare Intl
Search for one-way flight options from Heathrow to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 27 March 2026.