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Cheap flights from Chicago O'Hare Intl Airport to London from £272

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
26 Dec — 2 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in October or April, booked 41 days in advance, depart on a Sunday or Thursday and return on a Wednesday

Cheap flight deals from O'Hare Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to London (LON). 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 26 November 2025.

Round-trip from

£425

One-way from

£272

Popular in

June

Cheapest in

October

Average price

£517

Good round-trip deal

£519 or less

Good one-way deal

£366 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 12/2-21/2
  • 4 total stops
  • 48h 05m total
  • Chicago to London
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Scandinavian Airlines
  • Scandinavian Airlines
  • 8/2
  • 2 total stops
  • 17h 40m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£119 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
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Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).
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Find flight deals from O'Hare Intl to London

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 November 2025.

Wed 3/1218:30ORD - LHR
1 stop19h 00mIcelandair
Wed 10/1212:15LHR - ORD
1 stop11h 05mIcelandair
Deal found 24/11£425
Tue 9/1218:30ORD - LHR
1 stop19h 00mIcelandair
Thu 18/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 23/11£426
Sun 30/1120:25ORD - LGW
1 stop13h 20mTAP AIR PORTUGAL
Tue 9/1216:35LGW - ORD
1 stop28h 25mTAP AIR PORTUGAL
Deal found 24/11£427
Mon 1/1218:30ORD - LGW
1 stop10h 25mIcelandair
Tue 9/1211:55LGW - ORD
1 stop11h 25mIcelandair
Deal found 25/11£428
Thu 11/1218:30ORD - LHR
1 stop10h 20mIcelandair
Thu 18/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 24/11£430
Sun 30/1118:50ORD - STN
2 stops22h 35mMultiple Airlines
Wed 3/1206:50STN - ORD
2 stops19h 15mMultiple Airlines
Deal found 24/11£431
Mon 8/1218:30ORD - LHR
1 stop10h 20mIcelandair
Wed 24/1212:15LHR - ORD
1 stop11h 05mIcelandair
Deal found 23/11£432
Tue 9/1218:30ORD - STN
2 stops20h 50mMultiple Airlines
Thu 18/1206:30STN - ORD
2 stops16h 50mMultiple Airlines
Deal found 23/11£432
Tue 9/1218:30ORD - LHR
1 stop19h 00mIcelandair
Mon 15/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 25/11£433
Tue 30/1218:30ORD - LGW
1 stop10h 25mIcelandair
Sat 31/111:55LGW - ORD
1 stop11h 25mIcelandair
Deal found 25/11£433
Mon 1/1218:30ORD - LHR
1 stop10h 20mIcelandair
Mon 8/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 25/11£434
Thu 11/1218:30ORD - LHR
1 stop10h 20mIcelandair
Mon 15/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 25/11£434

Cheapflights Fare Finder

 
Customise your flight search to find flights from O'Hare Intl to London 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 26 November 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

O'Hare Intl

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 22/4

07:30-09:35

2 stops20h 05m

London Heathrow

Fri 1/5

21:05-16:10

2 stops25h 05m

£429

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 19/4

19:25-12:55

1 stop11h 30m

London Luton

Sun 26/4

06:25-18:15

1 stop17h 50m

£431

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 21/4

07:30-09:35

2 stops20h 05m

London Heathrow

Tue 5/5

21:05-16:10

2 stops25h 05m

£437

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Fri 9/1

19:20-23:25

2 stops22h 05m

London Stansted

Sun 18/1

18:45-16:45

2 stops28h 00m

£440

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 16/4

19:25-12:45

1 stop11h 20m

London Luton

Sun 26/4

06:25-18:15

1 stop17h 50m

£442

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 16/2

18:30-14:00

1 stop13h 30m

London Luton

Sun 22/2

06:00-17:20

1 stop17h 20m

£444

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 28/4

07:00-09:20

2 stops20h 20m

London Heathrow

Sat 2/5

06:40-16:10

2 stops15h 30m

£448

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sat 17/1

18:30-13:00

1 stop12h 30m

London Luton

Wed 21/1

08:00-17:20

1 stop15h 20m

£451

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 9/12

15:45-05:55

Nonstop8h 10m

London Heathrow

Wed 14/1

11:10-18:25

1 stop13h 15m

£463

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 28/4

07:30-09:35

2 stops20h 05m

London Heathrow

Mon 4/5

07:05-16:10

2 stops15h 05m

£465

Flights are sorted by cheapest return flights first.

Deals found on 23/11

Showing 1-10 of 60 results
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Best time to book a flight from O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from O'Hare Intl 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 Chicago O'Hare Intl Airport to London

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

Use this chart to determine the optimal time to book a return flight from O'Hare Intl to London. Price data was last updated on 21 November 2025.

The price you pay for your flight from Chicago O'Hare Intl Airport to London may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of £300). Flying from Chicago O'Hare Intl Airport to London in July is currently the most expensive (average of £462). 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 ORD to LON?

Find hourly flight availability from O'Hare Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 November 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the afternoon. Doing so could potentially save you 29% on the flight price compared to flying at midday, which is usually more expensive.

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

Explore weekly flight availability from O'Hare Intl to London. 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 26 November 2025.

The most flights from ORD to LON are scheduled on a Monday (47 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (30 on average).

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

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

Dublin (DUB) – chosen by Cheapflights users on 31% of one-stop itineraries from Chicago O'Hare Intl Airport to London on Cheapflights.

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

Average return fare for one-stop flights from Chicago O'Hare Intl Airport to London, 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 £375.

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

Shortest average travel time for one-stop one-way flights from Chicago O'Hare Intl Airport to London, 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: 9h 50m.

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

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 02m.

How often are flights from Chicago to London delayed?

About 24% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 170 minutes.

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

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

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

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

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

Over the past year, United Airlines have had the lowest number of delays on this route, with just 22% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 26 November 2025.
Get a feel of what it's like to fly with United Airlines, Icelandair, andIberia from Chicago O'Hare Intl Airport to London 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
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,046 reviews
United Airlines
7.4
Good
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Icelandair
7.0
Good
581 reviews
United Airlines
7.4
Good
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,034 reviews
United Airlines
7.4
Good
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,593 reviews
United Airlines
7.4
Good
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,539 reviews
United Airlines
7.4
Good
9,046 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to London. 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 Chicago O'Hare Intl Airport to London?

    For as low as £463, Scandinavian Airlines can have you in London from Chicago O'Hare Intl Airport in 8h 10m. Chicago O'Hare Intl Airport and London are separated by a distance of 3939 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    According to our current data, Lufthansa (£366), American Airlines (£394), and Finnair (£423) offers the cheapest pricing from Chicago O'Hare Intl Airport to London. Users have found that Lufthansa is 36% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Scandinavian Airlines, with whom users have recently found tickets for as low as £272. However, be on the lookout for offers from Iberia and TAP AIR PORTUGAL, as they are both options that can get you from Chicago O'Hare Intl Airport to London for a low price.

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

    The most popular flight routes from Chicago O'Hare Intl Airport to London are Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick and Chicago O'Hare Intl - London City.

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

    No one likes to see their flight delayed. When booking a flight from Chicago O'Hare Intl Airport to London consider choosing Gulf Air (70%), Malaysia Airlines (66%) or SriLankan Airlines (65%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Chicago O'Hare Intl Airport to London? While on average our users pay £767, our data indicates the cheapest price to be £300. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £297.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to London.

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

    Yes. Cheapflights offers flight deals from O'Hare Intl to London 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 Chicago O'Hare Intl Airport to London?

    Currently, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of £300). Flying from Chicago O'Hare Intl Airport to London in July is currently the most expensive (average of £462). 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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Top 7 airlines flying from O'Hare Intl to London

Discover the top 7 airlines that operate flights from O'Hare Intl to London. 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 26 November 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£366Average£528FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£394Average£626FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£423Average£688FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£456Average£541FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£459Average£593FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£460Average£585FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£472Average£630FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

When you search for this flight from O'Hare Intl to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to London from O'Hare Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Need flexible booking options for your flight to London from O'Hare Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from O'Hare Intl to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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