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Cheap flights from London to Chicago O'Hare Intl Airport from £348

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
11 Apr — 18 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in September or November, booked 70 days in advance, depart on a Wednesday or Thursday and return on a Sunday

Cheap flight deals from London to O'Hare Intl

Enter your travel dates to find the best prices.

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 12 March 2026.

Tue 31/318:45
LHR
-
ORD
1 stop27h 15m
TAP AIR PORTUGAL
Sun 12/418:00
ORD
-
LHR
1 stop12h 45m
TAP AIR PORTUGAL
Deal found 7/3£425
Mon 9/1117:00
LHR
-
ORD
1 stop29h 45m
Scandinavian Airlines
Fri 13/1119:20
ORD
-
LHR
1 stop32h 00m
Scandinavian Airlines
Deal found 7/3£426
Thu 29/1015:35
LHR
-
ORD
2 stops31h 10m
Scandinavian Airlines
Mon 2/1119:20
ORD
-
LHR
1 stop32h 00m
Scandinavian Airlines
Deal found 7/3£429
Wed 14/1021:05
LHR
-
ORD
2 stops25h 05m
Scandinavian Airlines
Fri 30/1020:20
ORD
-
LHR
2 stops17h 10m
Scandinavian Airlines
Deal found 9/3£430
Thu 23/407:00
STN
-
ORD
2 stops17h 15m
Multiple Airlines
Thu 30/419:25
ORD
-
STN
2 stops21h 30m
Multiple Airlines
Deal found 9/3£431
Mon 13/415:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Mon 27/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 7/3£432
Fri 24/415:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Fri 1/522:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 9/3£433
Fri 12/613:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Mon 22/619:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 11/3£434
Sat 13/614:10
LHR
-
ORD
1 stop23h 35m
United Airlines
Mon 15/605:00
ORD
-
LHR
1 stop10h 35m
United Airlines
Deal found 9/3£435
Wed 22/415:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Wed 29/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 7/3£437
Fri 17/418:45
LHR
-
ORD
1 stop27h 20m
TAP AIR PORTUGAL
Sat 25/418:05
ORD
-
LHR
1 stop12h 40m
TAP AIR PORTUGAL
Deal found 10/3£438
Tue 10/318:30
LHR
-
ORD
1 stop26h 30m
TAP AIR PORTUGAL
Sun 15/321:25
ORD
-
LHR
1 stop20h 15m
TAP AIR PORTUGAL
Deal found 7/3£439

Find flight deals from London to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 March 2026.

Round-trip from

£425

One-way from

£348

Popular in

July

Cheapest in

September

Average price

£552

Good round-trip deal

£582 or less

Good one-way deal

£418 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 31/3-12/4
  • 2 total stops
  • 40h 00m total
  • London to Chicago
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 19/4
  • 1 total stop
  • 34h 15m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
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

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 March 2026.
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

Cheapest return flight

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 15/4

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Mon 27/4

19:15-16:25

2 stops15h 10m

£461

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 17/4

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Sun 19/4

22:25-14:40

1 stop10h 15m

£468

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 14/4

19:50-16:10

2 stops26h 20m

Chicago O'Hare Intl

Mon 20/4

19:15-16:25

2 stops15h 10m

£486

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 17/4

06:20-14:00

1 stop13h 40m

Chicago O'Hare Intl

Thu 23/4

15:45-12:25

1 stop14h 40m

£519

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 23/4

13:00-19:15

1 stop12h 15m

Chicago O'Hare Intl

Tue 12/5

15:45-09:15

1 stop11h 30m

£520

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 24/4

12:50-16:10

2 stops33h 20m

Chicago O'Hare Intl

Fri 1/5

19:15-00:30

2 stops23h 15m

£527

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

09:05-13:20

1 stop34h 15m

Chicago O'Hare Intl

Mon 27/4

16:25-06:45

Nonstop8h 20m

£533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 16/4

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Mon 20/4

19:25-11:55

1 stop10h 30m

£542

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 16/4

08:45-15:55

1 stop13h 10m

Chicago O'Hare Intl

Mon 20/4

16:25-06:45

Nonstop8h 20m

£560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 23/4

07:25-14:00

1 stop12h 35m

Chicago O'Hare Intl

Tue 12/5

18:40-09:00

Nonstop8h 20m

£562

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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.
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?

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 6 March 2026.

The best time to book flights from London to Chicago O'Hare Intl Airport is 70 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, December is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £218). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £491). 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?

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 12 March 2026.

When flying from London to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 12 March 2026.

The most flights from LON to ORD are scheduled on a Wednesday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

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

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

Share of one-stop return flights from London to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 53% of one-stop itineraries from London to Chicago O'Hare Intl Airport on Cheapflights.

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

Average return fare for one-stop flights from London to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £362.

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

Shortest average travel time for one-stop one-way flights from London to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 10h 57m.

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

Average stopover duration for one-stop one-way flights from London to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

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

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 169 minutes.

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.

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.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated 12 March 2026.
Get a feel of what it's like to fly with United Airlines,Aer Lingus, andIcelandair from London to Chicago O'Hare Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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
9,421 reviews
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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.
Aer Lingus
7.2
Good
1,475 reviews
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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.
Icelandair
7.1
Good
620 reviews
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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.
Lufthansa
6.8
Okay
7,846 reviews
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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.
British Airways
6.7
Okay
7,784 reviews
United Airlines
7.4
Good
9,421 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

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.

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.

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

    Scandinavian Airlines, Icelandair, and Austrian Airlines can get you from London to Chicago O'Hare Intl Airport in just under 11h 45m. Your travel time can differ by up to 22h 30m. There are 3960 mi between London and Chicago O'Hare Intl Airport. This flight may include one or multiple stops.

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

    Flying on Virgin Atlantic is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £345. Additional return tickets that might be worth considering are offered by Icelandair and Aer Lingus, with the lowest prices starting at £346 and £364, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 36% 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 JetBlue. According to our data, you can fly for as low as £310. Users have also found prices from £325 and £378 on Icelandair and Brussels Airlines, 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 Stansted - 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 (95%), Brussels Airlines (95%) or Lufthansa (95%) 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 £362. On average you can expect to pay £1,200. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £385.

  • 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, December is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £218). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £491). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village

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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 12 March 2026.
British Airways flights from London to Chicago O'Hare Intl
Lufthansa flights from London to Chicago O'Hare Intl
Finnair flights from London to Chicago O'Hare Intl

Top 10 airlines flying from London to O'Hare Intl

Discover the top 10 airlines that operate flights from London to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£345Average£530FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£346Average£484FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£364Average£627FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£370Average£573FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£375Average£508FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£386Average£542FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£395Average£582FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£399Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£404Average£619FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£411Average£567FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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