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

Flying on Icelandair is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £415. Additional return tickets that might be worth considering are offered by Austrian Airlines and British Airways, with the lowest prices starting at £417 and £418, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 26% 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 £337. Users have also found prices from £368 and £398 on Icelandair 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 £434. On average you can expect to pay £1,756. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £353.

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

Consider Air Canada (93%), Austrian Airlines (93%) or United Airlines (93%) 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 17% 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 £644.

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 £551 per person but you can even find prices for as low as £331. The most expensive prices can be found in the month of August. Opting for a February flight can save you 26% 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.

£325+ 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 April, 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	£415
One-way from	£325
Popular in	August
Cheapest in	February
Average price	£529
Good round-trip deal	£557 or less
Good one-way deal	£584 or less

Icelandair
6/6-8/6
2 total stops
30h 05m total
London to Chicago

Search Deals

8/5
2 total stops
24h 50m total
London to Chicago

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£47 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 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 25 March 2025.

Fri 6/613:05LHR - ORD

1 stop11h 10mIcelandair

Sun 8/619:25ORD - LHR

1 stop18h 55mIcelandair

Deal found 24/3£415

Thu 8/514:50LGW - ORD

2 stops31h 20mMultiple Airlines

Thu 15/519:15ORD - LGW

2 stops20h 10mMultiple Airlines

Deal found 24/3£416

Sun 4/506:00LHR - ORD

1 stop12h 10mMultiple Airlines

Sun 11/518:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 23/3£416

Sun 20/406:00LHR - ORD

1 stop13h 20mAustrian Airlines

Sun 27/411:15ORD - LHR

1 stop17h 25mAustrian Airlines

Deal found 24/3£417

Sun 20/407:25LHR - ORD

1 stop12h 30mUnited Airlines

Fri 9/511:10ORD - LHR

1 stop13h 45mUnited Airlines

Deal found 25/3£418

Wed 30/415:40LGW - ORD

1 stop11h 35mIcelandair

Mon 5/519:25ORD - LGW

1 stop10h 20mIcelandair

Deal found 24/3£419

Wed 23/421:05LGW - ORD

1 stop22h 25mBritish Airways

Mon 28/411:36ORD - LGW

2 stops16h 39mBritish Airways

Deal found 23/3£421

Thu 24/414:50STN - ORD

2 stops33h 25mMultiple Airlines

Thu 1/519:25ORD - STN

2 stops15h 15mMultiple Airlines

Deal found 25/3£423

Fri 25/406:30LHR - ORD

1 stop13h 40mVirgin Atlantic

Sat 26/415:30ORD - LHR

1 stop33h 45mVirgin Atlantic

Deal found 25/3£425

Fri 6/613:30LTN - ORD

2 stops32h 40mMultiple Airlines

Sun 8/619:15ORD - LTN

2 stops20h 15mMultiple Airlines

Deal found 24/3£425

Sat 19/411:05LHR - ORD

Nonstop9h 05mLufthansa

Fri 2/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 24/3£428

Wed 10/914:25LHR - ORD

Nonstop8h 35mBritish Airways

Wed 17/922:20ORD - LHR

1 stop10h 35mBritish Airways

Deal found 25/3£429

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 25 March 2025.

Fri 6/613:05LHR - ORD

1 stop11h 10mIcelandair

Sun 8/619:25ORD - LHR

1 stop18h 55mIcelandair

Deal found 24/3£415

Thu 8/514:50LGW - ORD

2 stops31h 20mMultiple Airlines

Thu 15/519:15ORD - LGW

2 stops20h 10mMultiple Airlines

Deal found 24/3£416

Sun 20/406:00LHR - ORD

1 stop13h 20mAustrian Airlines

Sun 27/411:15ORD - LHR

1 stop17h 25mAustrian Airlines

Deal found 24/3£417

Thu 24/414:25LHR - ORD

Nonstop8h 35mBritish Airways

Thu 1/517:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 25/3£418

Sat 3/506:30LHR - ORD

1 stop12h 25mLufthansa

Tue 13/518:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 24/3£418

Fri 25/406:30LHR - ORD

1 stop13h 40mVirgin Atlantic

Sat 26/415:30ORD - LHR

1 stop33h 45mVirgin Atlantic

Deal found 25/3£425

Sun 4/506:50LHR - ORD

1 stop11h 10mUnited Airlines

Mon 12/517:55ORD - LHR

1 stop10h 45mUnited Airlines

Deal found 24/3£428

Wed 23/406:50LHR - ORD

2 stops14h 05mAir Canada

Tue 29/414:05ORD - LHR

1 stop15h 45mAir Canada

Deal found 24/3£430

Sat 3/515:05LGW - ORD

2 stops21h 59mFinnair

Sat 10/520:17ORD - LGW

2 stops29h 33mFinnair

Deal found 24/3£432

Tue 22/419:20LCY - ORD

1 stop23h 25mSWISS

Tue 29/414:20ORD - LCY

1 stop21h 10mSWISS

Deal found 24/3£434

Mon 5/509:30LHR - ORD

1 stop14h 20mAmerican Airlines

Sun 11/520:30ORD - LHR

Nonstop8h 00mAmerican Airlines

Deal found 24/3£437

Thu 1/508:40LHR - ORD

1 stop11h 30mDelta

Fri 9/513:30ORD - LHR

1 stop13h 45mDelta

Deal found 24/3£445

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 25 March 2025.

Fri 25/412:15LHR - ORD

Nonstop8h 30mBritish Airways

Mon 5/522:25ORD - LHR

Nonstop7h 50mBritish Airways

Deal found 24/3£417

Sat 19/414:10LHR - ORD

Nonstop9h 05mLufthansa

Fri 2/521:20ORD - LHR

Nonstop8h 25mLufthansa

Deal found 25/3£418

Mon 21/411:05LHR - ORD

Nonstop9h 05mAustrian Airlines

Mon 28/418:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 25/3£425

Thu 24/414:10LHR - ORD

Nonstop9h 05mMultiple Airlines

Thu 1/518:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 25/3£431

Mon 8/915:30LHR - ORD

Nonstop8h 45mIberia

Thu 18/921:15ORD - LHR

Nonstop7h 40mIberia

Deal found 25/3£440

Sat 19/409:15LHR - ORD

Nonstop8h 30mFinnair

Fri 2/520:20ORD - LHR

Nonstop8h 10mFinnair

Deal found 24/3£451

Mon 8/914:25LHR - ORD

Nonstop8h 35mAmerican Airlines

Thu 18/917:00ORD - LHR

Nonstop7h 55mAmerican Airlines

Deal found 24/3£452

Wed 9/408:30LHR - ORD

Nonstop9h 05mBrussels Airlines

Wed 16/416:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 24/3£592

Last-minute flights from London to O'Hare Intl
Discover last-minute flight deals from London to O'Hare Intl. Data last updated 25 March 2025 and is based on user searches.

Mon 31/316:10STN - ORD

2 stops30h 00mMultiple Airlines

Mon 7/420:05ORD - STN

2 stops20h 05mMultiple Airlines

Deal found 24/3£496

Mon 31/308:40LHR - ORD

2 stops15h 41mDelta

Mon 7/414:10ORD - LHR

1 stop14h 20mDelta

Deal found 24/3£500

Mon 31/315:50LGW - ORD

2 stops45h 44mMultiple Airlines

Wed 2/412:14ORD - LGW

1 stop15h 46mMultiple Airlines

Deal found 24/3£510

Tue 1/413:00LGW - ORD

1 stop11h 20mIcelandair

Fri 4/419:30ORD - LGW

1 stop10h 15mIcelandair

Deal found 25/3£500

Thu 3/408:40LHR - ORD

1 stop13h 15mMultiple Airlines

Tue 29/416:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 25/3£459

Thu 3/408:40LHR - ORD

1 stop13h 15mSWISS

Tue 29/414:20ORD - LHR

1 stop11h 35mSWISS

Deal found 25/3£459

Thu 3/406:00LHR - ORD

1 stop13h 20mAustrian Airlines

Mon 28/411:15ORD - LHR

1 stop13h 40mAustrian Airlines

Deal found 24/3£462

Thu 3/408:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Tue 8/417:08ORD - LHR

1 stop9h 47mVirgin Atlantic

Deal found 24/3£468

Thu 3/408:40LHR - ORD

1 stop13h 15mUnited Airlines

Tue 8/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Deal found 24/3£472

Thu 3/409:15LHR - ORD

Nonstop8h 35mBritish Airways

Mon 28/422:20ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 24/3£481

Thu 3/411:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Tue 29/421:20ORD - LHR

Nonstop8h 25mBrussels Airlines

Deal found 25/3£485

Thu 3/413:30LHR - ORD

1 stop12h 25mLufthansa

Tue 8/414:25ORD - LHR

2 stops14h 15mLufthansa

Deal found 25/3£504

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 25 March 2025.

Thu 8/521:20STN - ORD

2 stops24h 50mMultiple Airlines

Deal found 23/3£325

Wed 2/407:15LGW - ORD

3 stops30h 19mMultiple Airlines

Deal found 24/3£326

Thu 3/407:00LTN - ORD

3 stops30h 34mMultiple Airlines

Deal found 24/3£326

Thu 19/607:20LHR - ORD

2 stops39h 24mMultiple Airlines

Deal found 23/3£329

Thu 22/519:50LHR - ORD

1 stop26h 20mTAP AIR PORTUGAL

Deal found 24/3£337

Thu 8/513:05LHR - ORD

1 stop11h 10mIcelandair

Deal found 23/3£368

Thu 17/417:40SEN - ORD

2 stops42h 05mMultiple Airlines

Deal found 24/3£375

Wed 25/616:25LGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 24/3£393

Tue 22/408:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 25/3£398

Fri 2/514:10LHR - ORD

1 stop32h 34mWestJet

Deal found 24/3£411

Sun 15/615:40LGW - ORD

1 stop32h 35mIcelandair

Deal found 23/3£413

Thu 8/517:50LCY - ORD

3 stops28h 20mMultiple Airlines

Deal found 23/3£433

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

Fri 6/6

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Sun 8/6

19:25-20:20

1 stop18h 55m

£415

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 8/5

14:50-16:10

2 stops31h 20m

Chicago O'Hare Intl

Thu 15/5

19:15-21:25

2 stops20h 10m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 4/5

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Sun 11/5

18:05-08:20

Nonstop8h 15m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/4

07:25-13:55

1 stop12h 30m

Chicago O'Hare Intl

Fri 9/5

11:10-06:55

1 stop13h 45m

£418

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 30/4

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Mon 5/5

19:25-11:45

1 stop10h 20m

£419

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 23/4

21:05-13:30

1 stop22h 25m

Chicago O'Hare Intl

Mon 28/4

11:36-10:15

2 stops16h 39m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/4

19:30-13:20

1 stop23h 50m

Chicago O'Hare Intl

Fri 9/5

16:05-06:20

Nonstop8h 15m

£423

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 24/4

14:50-18:15

2 stops33h 25m

Chicago O'Hare Intl

Thu 1/5

19:25-16:40

2 stops15h 15m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 25/4

06:30-14:10

1 stop13h 40m

Chicago O'Hare Intl

Sat 26/4

15:30-07:15

1 stop33h 45m

£425

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 6/6

13:30-16:10

2 stops32h 40m

Chicago O'Hare Intl

Sun 8/6

19:15-21:30

2 stops20h 15m

£425

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 54 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.

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

7,890 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

7,890 reviews

Delta

8.0

Very Good

7,890 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

1,318 reviews

Delta

8.0

Very Good

7,890 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

1,061 reviews

Delta

8.0

Very Good

7,890 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

1,266 reviews

Delta

8.0

Very Good

7,890 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

7.5

Good

769 reviews

Delta

8.0

Very Good

7,890 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 Icelandair is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £415. Additional return tickets that might be worth considering are offered by Austrian Airlines and British Airways, with the lowest prices starting at £417 and £418, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 26% 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 £337. Users have also found prices from £368 and £398 on Icelandair 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 Air Canada (93%), Austrian Airlines (93%) or United Airlines (93%) 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 £434. On average you can expect to pay £1,756. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £353.
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

Evanston

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£324	Average£498	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£367	Average£521	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£381	Average£611	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
British Airways	Cheapest£419	Average£574	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Austrian Airlines	Cheapest£422	Average£579	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£424	Average£582	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£424	Average£598	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£428	Average£566	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Brussels Airlines	Cheapest£438	Average£707	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Aer Lingus	Cheapest£449	Average£589	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to O'Hare Intl?

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.

Can Cheapflights find flights from London to O'Hare Intl with no change fees?

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.

Can Cheapflights notify me if prices for flights from London to O'Hare Intl become cheaper?

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 £325

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 8/5. 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 April, 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 25 March 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 25 March 2025.

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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 21 March 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 25 March 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.

Rainfall in O'Hare Intl by month

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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.

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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 25 March 2025.