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Cheap flights from Chicago to London from £258

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LON
3 Mar — 10 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to London are usually found in April or September, booked 33 days in advance, depart on a Sunday or Monday and return on a Wednesday

Cheap flight deals from Chicago to London

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to London
Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 February 2026.

Sun 15/218:30
ORD
-
LHR
1 stop19h 00m
Icelandair
Fri 27/212:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 31/1£380
Wed 1/419:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Mon 20/413:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 31/1£380
Sun 19/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Sun 10/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 1/2£380
Thu 2/419:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Sun 19/421:25
LHR
-
ORD
1 stop26h 50m
Icelandair
Deal found 30/1£381
Sun 15/218:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Thu 26/211:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 29/1£381
Wed 4/318:30
ORD
-
STN
2 stops22h 20m
Multiple Airlines
Thu 12/306:30
STN
-
ORD
2 stops16h 50m
Multiple Airlines
Deal found 29/1£381
Sun 19/419:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Sat 25/421:25
LHR
-
ORD
1 stop30h 00m
Icelandair
Deal found 31/1£382
Mon 21/919:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Wed 30/915:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Deal found 1/2£382
Fri 27/218:30
ORD
-
STN
2 stops21h 25m
Multiple Airlines
Fri 6/306:45
STN
-
ORD
2 stops16h 35m
Multiple Airlines
Deal found 29/1£382
Wed 22/419:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Tue 5/513:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 30/1£383
Mon 20/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Sun 10/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 29/1£383
Wed 4/318:30
ORD
-
STN
2 stops17h 20m
Multiple Airlines
Tue 10/306:30
STN
-
ORD
2 stops16h 50m
Multiple Airlines
Deal found 29/1£383

Find flight deals from Chicago to London

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 1 February 2026.

Round-trip from

£380

One-way from

£258

Popular in

June

Cheapest in

April

Average price

£480

Good round-trip deal

£486 or less

Good one-way deal

£291 or less
Icelandair
  • Icelandair
  • 15/2-27/2
  • 2 total stops
  • 30h 05m total
  • Chicago to London
Search Deals
20/5
  • 20/5
  • 2 total stops
  • 31h 31m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to London (LON).
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Chicago 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 1 February 2026.
Use the filters below to find and compare flights from Chicago to London that are best for you.

Fly from

Chicago

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 4/3

18:30-17:05

2 stops16h 35m

London Luton

Wed 11/3

06:50-18:20

2 stops16h 30m

£386

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 23/2

18:30-10:50

1 stop10h 20m

London Heathrow

Mon 2/3

20:35-17:20

1 stop26h 45m

£386

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 15/4

19:25-21:15

2 stops19h 50m

London Luton

Tue 21/4

09:40-18:15

2 stops14h 35m

£388

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 10/4

22:25-14:40

1 stop10h 15m

London Gatwick

Fri 17/4

15:40-21:25

1 stop11h 45m

£394

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 1/3

15:55-20:05

2 stops22h 10m

London Stansted

Tue 10/3

06:30-19:25

2 stops17h 55m

£398

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 11/2

19:20-22:50

2 stops21h 30m

London Stansted

Sat 14/2

21:45-16:55

2 stops25h 10m

£404

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 4/3

19:20-21:05

2 stops19h 45m

London Stansted

Sun 8/3

12:00-17:45

2 stops34h 45m

£405

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 11/5

19:25-11:45

1 stop10h 20m

London Gatwick

Wed 20/5

15:40-21:25

1 stop11h 45m

£406

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 16/2

19:20-17:00

2 stops15h 40m

London Heathrow

Mon 23/2

07:05-16:45

2 stops15h 40m

£437

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 23/2

19:20-16:00

1 stop14h 40m

London Heathrow

Wed 4/3

10:20-16:45

1 stop12h 25m

£445

Flights are sorted by cheapest return flights first.

Deals found on 30/1

Showing 1-10 of 60 results
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Best time to book a flight from Chicago to London

Have a flexible travel schedule? Discover the best time to fly to London from Chicago 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 to London

How far ahead should I book a flight from Chicago to London?

Use this chart to determine the optimal time to book a return flight from Chicago to London. Price data was last updated on 30 January 2026.

The best time to book flights from Chicago to London is 33 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 Chicago to London?

Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of £274). Flying from Chicago to London in July is currently the most expensive (average of £445). 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 CHI to LON?

Find hourly flight availability from Chicago 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 1 February 2026.

When flying from Chicago to London, 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 Chicago to London

Explore weekly flight availability from Chicago 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 1 February 2026.

The most flights from CHI to LON are scheduled on a Friday (45 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

What’s the top stopover airport for flights from Chicago to London?

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

Reykjavik (KEF) – chosen by Cheapflights users on 36% of one-stop itineraries from Chicago to London on Cheapflights.

What’s the cheapest stopover airport for flights from Chicago to London?

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

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £306.

What’s the fastest stopover option from Chicago to London?

Shortest average travel time for one-stop one-way flights from Chicago 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 to London?

Average stopover duration for one-stop one-way flights from Chicago 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 0h 55m.

How often are flights from Chicago to London delayed?

About 26% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 167 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 Sunday 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, American Airlines have had the lowest number of delays on this route, with just 25% 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 1 February 2026.
Read reviews from past customers who have flown with United Airlines, Aer Lingus, andIberia from Chicago to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,229 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Aer Lingus
7.2
Good
1,444 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,100 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,758 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,709 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 to London?

    Icelandair, Scandinavian Airlines, and United Airlines can get you from Chicago to London in just under 8h. Your travel time can differ by up to 7h 40m. There are 3939 mi between Chicago and London. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to London round-trip?

    Our cheapest airline available from Chicago to London is Lufthansa. Our recent data shows that you can find tickets from as low as £351 on this airline. Additional options worth looking into are American Airlines and Finnair, starting at £378 and £406 round-trip. These flights start at 36% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Chicago to London one-way?

    £162 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Lufthansa and British Airways, with prices starting from £270 and £272, respectively.

  • What are the most popular routes from Chicago to London?

    The most popular route from Chicago to London is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London Stansted.

  • What are the most reliable airlines from Chicago to London?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to London on time: Aer Lingus (73%), American Airlines (66%), Alaska Airlines (66%).

  • What are the cheapest flights from Chicago to London?

    On average you can expect to pay £418 for a flight from Chicago to London. The cheapest flight overall is £147 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £304.

  • Can I find deals for flights from Chicago to London that include hotel bookings?

    Yes. In addition to deals on Chicago to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Chicago to London?

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

  • Can I find deals for business class flights from Chicago to London?

    Yes. Cheapflights offers flight deals from Chicago 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 to London?

    Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of £274). Flying from Chicago to London in July is currently the most expensive (average of £445). 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 London?

Book flights to London if you plan to visit one of these locations
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Croydon
Luton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Bedford
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Eastbourne
Crawley
Kingston upon Thames
Romford
Ipswich

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Alternative routes for Chicago to London

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
O'Hare Intl to Gatwick flights
O'Hare Intl to Stansted flights
O'Hare Intl to London City flights
Midway to Heathrow flights
O'Hare Intl to Luton flights
O'Hare Intl to Edinburgh flights
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St. Louis to Gatwick flights
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St. Louis to Stansted flights
Midway to Manchester flights
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St. Louis to Leeds flights
Midway to Leeds flights
Evansville to Manchester flights
Moline to Gatwick flights

Top 7 airlines flying from Chicago to London

Discover the top 7 airlines that operate flights from Chicago 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 1 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£351Average£505FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£378Average£601FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£406Average£564FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£415Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£441Average£568FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IberiaCheapest£445Average£524FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£453Average£651FlexibilityNo 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 Chicago to London?

Cheapflights makes it easy to find Chicago to London flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Chicago to London?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from Chicago.

Can Cheapflights find flights from Chicago to London with no change fees?

Yes! Cheapflights helps users easily find flights from Chicago to London with no change fees.

Can Cheapflights notify me if prices for flights from Chicago to London become cheaper?

Yes! Start tracking prices for Chicago to London 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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