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 £414. Additional return tickets that might be worth considering are offered by Austrian Airlines and Icelandair, with the lowest prices starting at £415 and £418, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 24% 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 WestJet. According to our data, you can fly for as low as £391. Users have also found prices from £392 and £394 on Aer Lingus and TAP AIR PORTUGAL, 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 City - Chicago O'Hare Intl or London Gatwick - 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 £419. On average you can expect to pay £1,232. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £375.

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 16% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £525 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £612.

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 £531 per person but you can even find prices for as low as £320. 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.

£382+ Flights from London to Chicago O'Hare Intl Airport - Compare & Save Big

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	£414
One-way from	£382
Popular in	August
Cheapest in	February
Average price	£504
Good round-trip deal	£539 or less
Good one-way deal	£533 or less

SWISS
11/5-18/5
2 total stops
32h 15m total
London to Chicago

Search Deals

27/6
1 total stop
17h 56m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£53 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 29 April 2025.

Tue 6/510:40LGW - ORD

1 stop16h 45mAmerican Airlines

Tue 20/510:22ORD - LGW

1 stop15h 48mAmerican Airlines

Deal found 28/4£413

Wed 3/913:05LHR - ORD

1 stop14h 10mIcelandair

Sat 13/919:25ORD - LHR

1 stop10h 30mIcelandair

Deal found 28/4£413

Sun 11/506:00LHR - ORD

1 stop12h 10mSWISS

Sun 18/515:45ORD - LHR

1 stop20h 05mSWISS

Deal found 27/4£414

Mon 5/507:25LHR - ORD

1 stop12h 30mUnited Airlines

Tue 20/513:07ORD - LHR

1 stop11h 38mUnited Airlines

Deal found 28/4£415

Mon 5/506:00LHR - ORD

1 stop13h 20mMultiple Airlines

Mon 12/519:05ORD - LHR

1 stop11h 55mMultiple Airlines

Deal found 28/4£415

Fri 2/515:40LGW - ORD

1 stop11h 35mIcelandair

Wed 25/622:15ORD - LGW

1 stop10h 25mIcelandair

Deal found 28/4£416

Mon 5/508:30LHR - ORD

Nonstop9h 05mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 28/4£421

Fri 7/1106:40LHR - ORD

1 stop16h 05mScandinavian Airlines

Fri 14/1119:20ORD - LHR

2 stops17h 10mScandinavian Airlines

Deal found 28/4£423

Wed 17/909:15LHR - ORD

Nonstop8h 35mBritish Airways

Sun 21/920:40ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 29/4£424

Thu 18/908:45LCY - ORD

1 stop17h 10mMultiple Airlines

Mon 22/916:00ORD - LCY

1 stop18h 25mMultiple Airlines

Deal found 29/4£424

Mon 5/508:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 23/513:30ORD - LHR

1 stop10h 55mVirgin Atlantic

Deal found 28/4£424

Mon 5/506:50LHR - ORD

2 stops14h 15mAir Canada

Mon 12/512:00ORD - LHR

1 stop12h 35mAir Canada

Deal found 28/4£427

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 29 April 2025.

Sun 11/506:00LHR - ORD

1 stop12h 10mSWISS

Sun 18/515:45ORD - LHR

1 stop20h 05mSWISS

Deal found 27/4£414

Mon 5/506:00LHR - ORD

1 stop13h 20mAustrian Airlines

Thu 22/513:04ORD - LHR

1 stop11h 51mAustrian Airlines

Deal found 28/4£415

Mon 5/506:00LHR - ORD

1 stop13h 20mMultiple Airlines

Mon 12/519:05ORD - LHR

1 stop11h 55mMultiple Airlines

Deal found 28/4£415

Thu 25/915:40LGW - ORD

1 stop32h 35mIcelandair

Mon 29/919:25ORD - LGW

1 stop13h 10mIcelandair

Deal found 29/4£418

Sat 10/506:50LHR - ORD

1 stop11h 10mUnited Airlines

Sun 18/508:40ORD - LHR

1 stop15h 50mUnited Airlines

Deal found 29/4£418

Mon 5/508:30LHR - ORD

Nonstop9h 05mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 28/4£421

Thu 8/511:10LHR - ORD

Nonstop8h 45mBritish Airways

Mon 12/517:40ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 28/4£423

Mon 5/508:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 23/513:30ORD - LHR

1 stop10h 55mVirgin Atlantic

Deal found 28/4£424

Mon 5/506:50LHR - ORD

2 stops14h 15mAir Canada

Mon 12/512:00ORD - LHR

1 stop12h 35mAir Canada

Deal found 28/4£427

Mon 5/506:30LHR - ORD

1 stop13h 40mDelta

Fri 23/518:18ORD - LHR

1 stop12h 17mDelta

Deal found 28/4£442

Fri 9/514:40LHR - ORD

2 stops14h 28mFinnair

Sun 18/511:50ORD - LHR

1 stop12h 25mFinnair

Deal found 29/4£450

Sun 11/509:15LHR - ORD

Nonstop8h 30mAmerican Airlines

Sun 18/511:50ORD - LHR

1 stop12h 25mAmerican Airlines

Deal found 27/4£452

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 29 April 2025.

Mon 5/508:30LHR - ORD

Nonstop9h 05mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 28/4£421

Thu 8/511:10LHR - ORD

Nonstop8h 45mBritish Airways

Mon 12/517:40ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 28/4£423

Thu 8/512:15LHR - ORD

Nonstop8h 25mAmerican Airlines

Fri 23/516:55ORD - LHR

Nonstop7h 55mAmerican Airlines

Deal found 28/4£447

Thu 8/511:10LHR - ORD

Nonstop8h 45mMultiple Airlines

Fri 23/516:55ORD - LHR

Nonstop7h 55mMultiple Airlines

Deal found 28/4£469

Mon 5/508:30LHR - ORD

Nonstop9h 05mUnited Airlines

Sat 24/516:05ORD - LHR

Nonstop8h 15mUnited Airlines

Deal found 28/4£497

Sun 4/508:30LHR - ORD

Nonstop9h 05mBrussels Airlines

Sat 24/516:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 27/4£540

Fri 4/715:30LHR - ORD

Nonstop8h 45mIberia

Sun 13/717:45ORD - LHR

Nonstop7h 35mIberia

Deal found 28/4£549

Sat 28/614:10LHR - ORD

Nonstop9h 10mAustrian Airlines

Wed 9/721:25ORD - LHR

Nonstop8h 20mAustrian Airlines

Deal found 28/4£555

Sun 4/509:15LHR - ORD

Nonstop8h 30mFinnair

Sun 25/522:25ORD - LHR

Nonstop7h 50mFinnair

Deal found 27/4£564

Last-minute flights from London to O'Hare Intl
Discover last-minute flight deals from London to O'Hare Intl. Data last updated 29 April 2025 and is based on user searches.

Fri 2/515:40LGW - ORD

1 stop11h 35mIcelandair

Mon 26/519:25ORD - LGW

1 stop10h 20mIcelandair

Deal found 28/4£416

Sat 3/506:00LHR - ORD

1 stop13h 20mAustrian Airlines

Thu 22/513:04ORD - LHR

1 stop11h 51mAustrian Airlines

Deal found 27/4£435

Mon 5/507:25LHR - ORD

1 stop16h 50mUnited Airlines

Thu 22/508:52ORD - LHR

1 stop16h 03mUnited Airlines

Deal found 28/4£415

Mon 5/506:00LHR - ORD

1 stop13h 20mMultiple Airlines

Mon 12/519:05ORD - LHR

1 stop11h 55mMultiple Airlines

Deal found 28/4£415

Mon 5/508:30LHR - ORD

Nonstop9h 05mLufthansa

Mon 12/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 28/4£421

Mon 5/508:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 23/513:30ORD - LHR

1 stop10h 55mVirgin Atlantic

Deal found 28/4£424

Mon 5/506:50LHR - ORD

2 stops14h 15mAir Canada

Mon 12/512:00ORD - LHR

1 stop12h 35mAir Canada

Deal found 28/4£427

Mon 5/512:20LGW - ORD

1 stop27h 05mMultiple Airlines

Mon 12/513:47ORD - LGW

1 stop12h 48mMultiple Airlines

Deal found 28/4£434

Mon 5/506:30LHR - ORD

1 stop13h 40mDelta

Fri 23/518:18ORD - LHR

1 stop12h 17mDelta

Deal found 28/4£442

Mon 5/511:35LHR - ORD

1 stop11h 59mAmerican Airlines

Wed 21/511:50ORD - LHR

1 stop12h 25mAmerican Airlines

Deal found 28/4£448

Tue 6/510:40LGW - ORD

1 stop16h 45mAmerican Airlines

Tue 20/510:22ORD - LGW

1 stop15h 48mAmerican Airlines

Deal found 28/4£413

Wed 7/515:40LGW - ORD

1 stop11h 35mIcelandair

Thu 26/619:25ORD - LGW

1 stop13h 15mIcelandair

Deal found 28/4£416

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 29 April 2025.

Fri 27/610:00LGW - ORD

1 stop17h 56mMultiple Airlines

Deal found 28/4£382

Mon 23/606:00LHR - ORD

2 stops30h 37mMultiple Airlines

Deal found 28/4£385

Wed 7/506:15LTN - ORD

1 stop18h 00mMultiple Airlines

Deal found 27/4£390

Fri 2/514:10LHR - ORD

1 stop32h 34mWestJet

Deal found 28/4£391

Tue 6/507:40LHR - ORD

1 stop12h 20mAer Lingus

Deal found 28/4£392

Wed 4/618:45LHR - ORD

1 stop26h 40mTAP AIR PORTUGAL

Deal found 29/4£394

Tue 10/606:45LCY - ORD

2 stops16h 39mMultiple Airlines

Deal found 28/4£395

Wed 21/508:20STN - ORD

2 stops18h 55mMultiple Airlines

Deal found 28/4£400

Tue 6/507:00SEN - ORD

2 stops39h 10mMultiple Airlines

Deal found 29/4£400

Thu 4/908:45LCY - ORD

1 stop17h 10mLufthansa

Deal found 28/4£406

Thu 15/520:05LHR - ORD

1 stop22h 05mSWISS

Deal found 29/4£419

Tue 6/516:25LGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 29/4£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

LHR - ORD

LHRORD

London Heathrow

Sun 11/5

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Sun 18/5

15:45-17:50

1 stop20h 05m

£414

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

07:25-18:15

1 stop16h 50m

Chicago O'Hare Intl

Thu 22/5

08:52-06:55

1 stop16h 03m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

06:00-13:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 12/5

19:05-13:00

1 stop11h 55m

£415

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 25/9

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Mon 29/9

19:25-14:35

1 stop13h 10m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 9/5

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Mon 26/5

19:25-11:55

1 stop10h 30m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

08:30-11:35

Nonstop9h 05m

Chicago O'Hare Intl

Mon 12/5

18:05-08:20

Nonstop8h 15m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/5

11:10-13:55

Nonstop8h 45m

Chicago O'Hare Intl

Mon 12/5

17:40-07:20

Nonstop7h 40m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

08:40-14:10

1 stop11h 30m

Chicago O'Hare Intl

Fri 23/5

13:30-06:25

1 stop10h 55m

£424

LondonChicago

LCY - ORD

LCYORD

London City

Thu 18/9

08:45-19:55

1 stop17h 10m

Chicago O'Hare Intl

Mon 22/9

16:00-16:25

1 stop18h 25m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/5

06:50-15:05

2 stops14h 15m

Chicago O'Hare Intl

Mon 12/5

12:00-06:35

1 stop12h 35m

£427

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 58 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 (46 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

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

1,334 reviews

Delta

8.0

Very Good

7,929 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

1,069 reviews

Delta

8.0

Very Good

7,929 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

1,275 reviews

Delta

8.0

Very Good

7,929 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

780 reviews

Delta

8.0

Very Good

7,929 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 £414. Additional return tickets that might be worth considering are offered by Austrian Airlines and Icelandair, with the lowest prices starting at £415 and £418, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 24% 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 WestJet. According to our data, you can fly for as low as £391. Users have also found prices from £392 and £394 on Aer Lingus and TAP AIR PORTUGAL, 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 City - Chicago O'Hare Intl or London Gatwick - 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 £419. On average you can expect to pay £1,232. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £375.
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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Beloit

Rosemont

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Top 10 airlines flying from London to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£314	Average£478	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£356	Average£502	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£369	Average£603	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
British Airways	Cheapest£405	Average£554	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Austrian Airlines	Cheapest£409	Average£556	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
United Airlines	Cheapest£410	Average£578	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£415	Average£541	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£416	Average£578	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Brussels Airlines	Cheapest£423	Average£638	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Aer Lingus	Cheapest£429	Average£581	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 £382

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 27/6. 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

Cheap flight deals from London to O'Hare Intl

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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 29 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 29 April 2025.

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

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 25 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 29 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 29 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 29 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 29 April 2025.