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

Flying on SWISS is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £413. Additional return tickets that might be worth considering are offered by United Airlines and Finnair, with the lowest prices starting at £413 and £414, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 25% less than the average price by searching for these airlines.

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

For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as £380. Users have also found prices from £384 and £385 on WestJet and Aer Lingus, respectively.

What are the most popular routes from London to Chicago O'Hare Intl Airport?

When deciding which route to take from London to Chicago O'Hare Intl Airport consider London Heathrow - Chicago O'Hare Intl, London Gatwick - Chicago O'Hare Intl or London City - Chicago O'Hare Intl as they are the most popular.

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

The cheapest flight price from London to Chicago O'Hare Intl Airport is £420. On average you can expect to pay £1,494. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £395.

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

Consider United Airlines (90%), SWISS (89%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from London to Chicago O'Hare Intl Airport.

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

Before booking your flight from London to Chicago O'Hare Intl Airport check out the most popular airlines for this route: American Airlines, Air Canada or Finnair.

What is the cheapest day to fly round-trip from London to Chicago O'Hare Intl Airport?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 8% when planning your travel around this day of the week.

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

To save on the cost of your flight from London to Chicago O'Hare Intl Airport, book at least 45 days before your planned departure. Booking around this time can save you about 15% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £529 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £617.

What is the cheapest month to fly from London to Chicago O'Hare Intl Airport?

February is one of the best times of the year to fly to Chicago O'Hare Intl Airport from London. Prices for February average £536 per person but you can even find prices for as low as £323. The most expensive prices can be found in the month of August. Opting for a February flight can save you 27% on your journey compared to booking in August

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

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

How can I find direct flights from London 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 London to O'Hare Intl.

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

Yes. Cheapflights offers flight deals from London 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.

£304+ Flights from London to Chicago O'Hare Intl Airport

Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in February or March, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from London to O'Hare Intl

Round-trip from	£401
One-way from	£304
Popular in	August
Cheapest in	February
Average price	£502
Good round-trip deal	£540 or less
Good one-way deal	£544 or less

12/5-16/5
2 total stops
51h 34m total
London to Chicago

Search Deals

26/4
1 total stop
15h 36m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£55 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Chicago O'Hare Intl.

Search Deals

Price to beat on a one-way flight from London (LON) to Chicago O'Hare Intl.

Search Deals

Find flight deals from London to O'Hare Intl

Cheapest flights from London to O'Hare Intl
Explore the most affordable flight options available from London to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Mon 12/513:05LGW - ORD

1 stop24h 22mMultiple Airlines

Fri 16/521:08ORD - LGW

1 stop27h 12mMultiple Airlines

Deal found 16/4£401

Wed 7/506:50LHR - ORD

1 stop11h 10mMultiple Airlines

Sun 18/518:30ORD - LHR

1 stop11h 20mMultiple Airlines

Deal found 16/4£412

Tue 6/518:35LGW - ORD

1 stop27h 20mSWISS

Tue 13/519:05ORD - LGW

1 stop16h 45mSWISS

Deal found 16/4£413

Wed 7/513:45LHR - ORD

1 stop32h 10mUnited Airlines

Mon 12/518:05ORD - LHR

Nonstop8h 15mUnited Airlines

Deal found 16/4£413

Fri 2/512:20LGW - ORD

2 stops17h 29mFinnair

Sat 10/518:35ORD - LGW

2 stops30h 00mFinnair

Deal found 16/4£414

Thu 24/406:00LHR - ORD

1 stop12h 45mSWISS

Mon 5/518:35ORD - LHR

1 stop12h 25mSWISS

Deal found 17/4£415

Thu 24/406:00LHR - ORD

1 stop13h 20mAustrian Airlines

Mon 5/516:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 17/4£416

Sat 26/409:00LHR - ORD

1 stop15h 15mLufthansa

Sun 4/516:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 16/4£416

Mon 1/1211:55LGW - ORD

1 stop11h 25mIcelandair

Mon 15/1218:30ORD - LGW

1 stop10h 25mIcelandair

Deal found 16/4£418

Thu 24/408:40LHR - ORD

2 stops15h 42mAir Canada

Mon 5/518:30ORD - LHR

1 stop11h 20mAir Canada

Deal found 17/4£419

Wed 17/907:40LHR - ORD

1 stop14h 05mAmerican Airlines

Wed 24/915:14ORD - LHR

1 stop10h 36mAmerican Airlines

Deal found 16/4£420

Thu 24/414:25LHR - ORD

Nonstop8h 35mBritish Airways

Sun 27/420:20ORD - LHR

Nonstop8h 10mBritish Airways

Deal found 16/4£421

Best flights from London to O'Hare Intl
Discover carefully curated flight deals from London to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2025.

Mon 12/513:05LGW - ORD

1 stop24h 22mMultiple Airlines

Fri 16/521:08ORD - LGW

1 stop27h 12mMultiple Airlines

Deal found 16/4£401

Tue 6/518:35LGW - ORD

1 stop27h 20mSWISS

Tue 13/519:05ORD - LGW

1 stop16h 45mSWISS

Deal found 16/4£413

Thu 1/508:40LHR - ORD

1 stop13h 15mUnited Airlines

Mon 5/513:29ORD - LHR

1 stop11h 26mUnited Airlines

Deal found 16/4£413

Fri 2/512:20LGW - ORD

2 stops17h 29mFinnair

Sat 10/518:35ORD - LGW

2 stops30h 00mFinnair

Deal found 16/4£414

Thu 1/508:30LHR - ORD

1 stop12h 15mLufthansa

Mon 5/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 16/4£416

Thu 28/813:05LHR - ORD

1 stop11h 10mIcelandair

Sun 7/922:15ORD - LHR

1 stop16h 05mIcelandair

Deal found 16/4£416

Wed 17/908:50LHR - ORD

1 stop12h 55mAmerican Airlines

Wed 24/917:45ORD - LHR

Nonstop7h 35mAmerican Airlines

Deal found 16/4£417

Wed 30/412:15LHR - ORD

Nonstop8h 30mBritish Airways

Thu 8/517:40ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 16/4£421

Thu 25/906:50LHR - ORD

2 stops14h 00mAir Canada

Mon 29/915:50ORD - LHR

1 stop11h 45mAir Canada

Deal found 16/4£423

Sat 3/514:10LHR - ORD

Nonstop9h 05mAustrian Airlines

Sat 10/511:14ORD - LHR

1 stop13h 41mAustrian Airlines

Deal found 16/4£427

Tue 16/906:30LHR - ORD

1 stop13h 40mDelta

Mon 22/907:30ORD - LHR

1 stop16h 55mDelta

Deal found 16/4£444

Wed 7/514:25LHR - ORD

Nonstop8h 35mIberia

Wed 14/517:40ORD - LHR

Nonstop7h 40mIberia

Deal found 16/4£457

Direct flights from London to O'Hare Intl
Explore direct flight options from London to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2025.

Sat 20/915:30LHR - ORD

Nonstop8h 45mBritish Airways

Sat 27/916:55ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 15/4£419

Thu 25/908:30LHR - ORD

Nonstop9h 00mLufthansa

Mon 29/918:00ORD - LHR

Nonstop8h 20mLufthansa

Deal found 16/4£432

Thu 1/511:05LHR - ORD

Nonstop9h 05mAustrian Airlines

Mon 5/518:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 16/4£438

Thu 15/512:15LHR - ORD

Nonstop8h 25mMultiple Airlines

Thu 22/522:25ORD - LHR

Nonstop7h 50mMultiple Airlines

Deal found 16/4£449

Wed 7/514:25LHR - ORD

Nonstop8h 35mIberia

Wed 14/517:40ORD - LHR

Nonstop7h 40mIberia

Deal found 16/4£457

Wed 10/914:25LHR - ORD

Nonstop8h 35mFinnair

Sat 20/917:45ORD - LHR

Nonstop7h 35mFinnair

Deal found 15/4£483

Mon 12/509:15LHR - ORD

Nonstop8h 30mAmerican Airlines

Mon 26/522:25ORD - LHR

Nonstop7h 50mAmerican Airlines

Deal found 16/4£493

Mon 16/614:10LHR - ORD

Nonstop9h 10mBrussels Airlines

Thu 26/618:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 17/4£605

Last-minute flights from London to O'Hare Intl
Discover last-minute flight deals from London to O'Hare Intl. Data last updated 17 April 2025 and is based on user searches.

Thu 24/406:00LHR - ORD

1 stop12h 45mMultiple Airlines

Wed 7/521:20ORD - LHR

Nonstop8h 25mMultiple Airlines

Deal found 17/4£413

Thu 24/406:30LHR - ORD

1 stop12h 25mLufthansa

Wed 7/521:20ORD - LHR

Nonstop8h 25mLufthansa

Deal found 16/4£414

Thu 24/406:00LHR - ORD

1 stop12h 45mSWISS

Mon 5/518:35ORD - LHR

1 stop12h 25mSWISS

Deal found 17/4£415

Thu 24/406:00LHR - ORD

1 stop13h 20mAustrian Airlines

Mon 5/516:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 17/4£416

Thu 24/408:40LHR - ORD

2 stops15h 42mAir Canada

Mon 5/518:30ORD - LHR

1 stop11h 20mAir Canada

Deal found 17/4£419

Thu 24/414:25LHR - ORD

Nonstop8h 35mBritish Airways

Sun 27/420:20ORD - LHR

Nonstop8h 10mBritish Airways

Deal found 16/4£421

Thu 24/409:30LHR - ORD

1 stop11h 25mUnited Airlines

Wed 7/508:40ORD - LHR

1 stop15h 50mUnited Airlines

Deal found 16/4£429

Thu 24/415:40LGW - ORD

1 stop32h 35mIcelandair

Wed 7/522:15ORD - LGW

1 stop10h 25mIcelandair

Deal found 16/4£442

Thu 24/409:15LHR - ORD

1 stop12h 44mFinnair

Tue 29/412:00ORD - LHR

2 stops12h 20mFinnair

Deal found 17/4£445

Thu 24/406:30LHR - ORD

2 stops15h 38mDelta

Wed 7/514:15ORD - LHR

1 stop14h 15mDelta

Deal found 17/4£448

Thu 24/409:15LHR - ORD

Nonstop8h 30mAmerican Airlines

Wed 7/522:25ORD - LHR

Nonstop7h 50mAmerican Airlines

Deal found 16/4£453

Thu 24/409:20LCY - ORD

1 stop10h 50mVirgin Atlantic

Wed 7/516:50ORD - LCY

1 stop10h 40mVirgin Atlantic

Deal found 16/4£453

One-way flights from London to O'Hare Intl
Search for one-way flight options from London to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 17 April 2025.

Sat 26/414:00LGW - ORD

1 stop15h 36mMultiple Airlines

Deal found 16/4£304

Wed 14/506:00LHR - ORD

1 stop16h 10mTAP AIR PORTUGAL

Deal found 16/4£380

Tue 27/516:05LCY - ORD

2 stops28h 20mMultiple Airlines

Deal found 16/4£382

Thu 24/406:05LTN - ORD

3 stops42h 49mMultiple Airlines

Deal found 17/4£382

Sun 18/514:10LHR - ORD

1 stop32h 34mWestJet

Deal found 16/4£384

Tue 6/508:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 16/4£385

Wed 23/421:05LHR - ORD

3 stops47h 21mMultiple Airlines

Deal found 16/4£386

Sun 27/419:05STN - ORD

3 stops41h 58mMultiple Airlines

Deal found 15/4£386

Mon 7/709:30LHR - ORD

1 stop11h 21mLufthansa

Deal found 16/4£398

Tue 17/609:30LHR - ORD

1 stop11h 25mAir Canada

Deal found 16/4£400

Wed 3/908:45LCY - ORD

1 stop12h 10mLufthansa

Deal found 16/4£407

Tue 6/516:25LGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 16/4£422

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 12/5

13:05-07:27

1 stop24h 22m

Chicago O'Hare Intl

Fri 16/5

21:08-06:20

1 stop27h 12m

£401

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

06:50-12:00

1 stop11h 10m

Chicago O'Hare Intl

Sun 18/5

18:30-11:50

1 stop11h 20m

£412

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 6/5

18:35-15:55

1 stop27h 20m

Chicago O'Hare Intl

Tue 13/5

19:05-17:50

1 stop16h 45m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Mon 12/5

10:40-09:40

1 stop17h 00m

£413

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 2/5

12:20-23:49

2 stops17h 29m

Chicago O'Hare Intl

Sat 10/5

08:15-06:35

1 stop16h 20m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 2/5

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Tue 6/5

14:20-07:55

1 stop11h 35m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/5

08:30-14:45

1 stop12h 15m

Chicago O'Hare Intl

Mon 5/5

18:05-08:20

Nonstop8h 15m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 28/8

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Sun 7/9

22:15-20:20

1 stop16h 05m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 17/9

07:40-15:45

1 stop14h 05m

Chicago O'Hare Intl

Wed 24/9

15:14-07:50

1 stop10h 36m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 30/4

12:15-14:45

Nonstop8h 30m

Chicago O'Hare Intl

Thu 8/5

17:40-07:20

Nonstop7h 40m

£421

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 60 results

...

Best time to book a flight from London to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from London with our price prediction graph.

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 to Chicago O'Hare Intl Airport

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

The best time to book flights from London to Chicago O'Hare Intl Airport is 73 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 to Chicago O'Hare Intl Airport?

Currently, January is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £595). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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 LON to ORD?

It’s typically best to fly out from London to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 13% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from London to Chicago O'Hare Intl Airport?

Travellers seeking maximum savings on their London to Chicago O'Hare Intl Airport flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from LON to ORD are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (45 on average).

Rainfall in O'Hare Intl by month

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.

Temperature in O'Hare Intl by month

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).

Reviews of airlines servicing O'Hare Intl

Get a feel of what it's like to fly with Delta, KLM and LOT from London to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,916 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,327 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT

7.6

Good

1,065 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

775 reviews

Delta

8.0

Very Good

7,916 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines flying from London to Chicago O'Hare Intl Airport round-trip?
Flying on SWISS is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £413. Additional return tickets that might be worth considering are offered by United Airlines and Finnair, with the lowest prices starting at £413 and £414, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 25% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Chicago O'Hare Intl Airport one-way?
For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as £380. Users have also found prices from £384 and £385 on WestJet and Aer Lingus, respectively.
What are the most popular routes from London to Chicago O'Hare Intl Airport?
When deciding which route to take from London to Chicago O'Hare Intl Airport consider London Heathrow - Chicago O'Hare Intl, London Gatwick - Chicago O'Hare Intl or London City - Chicago O'Hare Intl as they are the most popular.
What are the most reliable airlines from London to Chicago O'Hare Intl Airport?
Consider United Airlines (90%), SWISS (89%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from London to Chicago O'Hare Intl Airport.
What are the cheapest flights from London to Chicago O'Hare Intl Airport?
The cheapest flight price from London to Chicago O'Hare Intl Airport is £420. On average you can expect to pay £1,494. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £395.
Can I find deals for flights from London to O'Hare Intl that include hotel bookings?
Yes. In addition to deals on London to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London 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 London to O'Hare Intl.
Can I find deals for business class flights from London to O'Hare Intl?
Yes. Cheapflights offers flight deals from London 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 to Chicago O'Hare Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £595). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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

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Downers Grove

Schaumburg

Elk Grove Village

Beloit

Rosemont

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from London to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£316	Average£486	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£359	Average£503	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£372	Average£596	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
British Airways	Cheapest£408	Average£559	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Austrian Airlines	Cheapest£412	Average£564	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
United Airlines	Cheapest£414	Average£584	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£418	Average£550	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£419	Average£572	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Brussels Airlines	Cheapest£427	Average£661	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Aer Lingus	Cheapest£434	Average£580	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

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Cheapflights helps you search for flights from London to O'Hare Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to O'Hare Intl?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to O'Hare Intl for you. Better yet — we are completely free to use.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from London to O'Hare Intl flexibly with Cheapflights today.

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Yes! Start tracking prices for London to O'Hare Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from London to Chicago O'Hare Intl Airport from £304

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in February or March, booked 73 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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Find flight deals from London to O'Hare Intl

Cheapest flights from London to O'Hare IntlExplore the most affordable flight options available from London to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Explore the most affordable flight options available from London to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

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Best time to book a flight from London to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Chicago O'Hare Intl Airport

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

Use this chart to determine the optimal time to book a return flight from London to O'Hare Intl. Price data was last updated on 11 April 2025.

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

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

Find hourly flight availability from London to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 April 2025.

What is the cheapest day to fly from London to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly return from London to O'Hare Intl. Price data was last updated on 16 December 2024.

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

Explore weekly flight availability from London to O'Hare Intl. 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 17 April 2025.

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing O'Hare Intl

Get a feel of what it's like to fly with Delta, KLM and LOT from London to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London 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.

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

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

What are the most popular routes from London to Chicago O'Hare Intl Airport?

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

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

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

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

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

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

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Fly from London to O'Hare Intl on these airlines

Choose from the following airlines for your flight from London to O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on 17 April 2025.

Top 10 airlines flying from London to O'Hare Intl

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Cheapest flights from London to O'Hare Intl
Explore the most affordable flight options available from London to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.