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Cheap flights from Chicago to London from £236

CHI — LON
21 Nov — 28 Nov1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to London are usually found in February or January, booked 73 days in advance, depart on a Monday or Wednesday 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

Wed 30/1220:05 -
1 stop21h 15m
Sat 9/108:45 -
2 stops38h 35m
Deal found 17/10£525
Fri 27/1120:10 -
1 stop21h 45m
Sat 5/1218:30 -
2 stops27h 00m
Deal found 19/10£527
Wed 9/1218:30 -
1 stop16h 55m
Thu 17/1210:10 -
1 stop13h 10m
Deal found 17/10£527
Sun 15/1120:10 -
1 stop21h 40m
Tue 24/1113:25 -
2 stops32h 05m
Deal found 20/10£527
Thu 19/1118:30 -
1 stop10h 25m
Sun 22/1111:55 -
1 stop11h 25m
Deal found 17/10£528
Tue 3/1118:30 -
2 stops18h 20m
Tue 17/1108:15 -
2 stops15h 05m
Deal found 17/10£528
Sun 29/1118:30 -
1 stop14h 40m
Tue 8/1208:00 -
1 stop15h 20m
Deal found 22/10£529
Wed 25/1118:30 -
2 stops20h 50m
Tue 1/1207:15 -
2 stops16h 05m
Deal found 17/10£529
Thu 10/1219:10 -
1 stop14h 50m
Fri 18/1219:30 -
1 stop27h 15m
Deal found 17/10£530
Mon 7/1218:30 -
2 stops17h 30m
Thu 10/1207:55 -
2 stops15h 25m
Deal found 18/10£530
Sun 15/1120:10 -
1 stop31h 35m
Tue 24/1106:20 -
2 stops39h 10m
Deal found 20/10£530
Tue 10/1118:30 -
2 stops17h 35m
Thu 10/1207:55 -
2 stops15h 25m
Deal found 21/10£530

Find flight deals from Chicago to London

Round-trip from

£525

One-way from

£236

Popular in

June

Cheapest in

February

Average price

£663

Good round-trip deal

£715 or less

Good one-way deal

£278 or less
30/12-9/1
  • 30/12-9/1
  • 3 total stops
  • 59h 50m total
  • Chicago to London
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25/11-31/12
  • 25/11-31/12
  • 2 total stops
  • 17h 15m total
  • Chicago to London
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Highest demand for flights based on searches. 21% potential increase in price (£132 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Chicago (CHI) to London (LON).
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Price to beat on a one-way flight from Chicago (CHI) to London (LON).
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Chicago to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Sun 17/1

10:00-06:20

2 stops14h 20m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£246

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Mon 23/11

22:00-13:35

3 stops57h 35m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£258

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sun 14/2

18:30-17:30

2 stops17h 00m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£260
Fastest return journey

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Sat 20/3

16:45-05:55

Nonstop8h 10m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£280

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Thu 4/3

12:40-09:10

2 stops14h 30m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£283

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Wed 24/3

22:25-08:05

2 stops28h 40m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£288

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Fri 6/11

20:10-09:05

2 stops30h 55m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£312

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Thu 29/10

19:30-23:15

2 stops22h 45m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£367

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Tue 8/12

11:45-09:55

1 stop16h 10m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£387

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Sun 14/2

18:30-17:50

2 stops17h 20m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£393

Flights are sorted by cheapest return flights first.

Deals found on 19/10

Showing 1-10 of 60 resultsSorted by cheapest first
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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

Cheapflights Insights

Everything you need to know about your flight from Chicago to London

What is the cheapest month to book a flight from Chicago to London?

Currently, January is the cheapest month in which you can book a flight from Chicago to London (average of £466). Flying from Chicago to London in June is currently the most expensive (average of £1,032). 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?

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.

How much does it cost for a return flight from Chicago to London?

Airfare is typical for this route at the moment.
Chicago to London flights typically cost between £502 and £728 in December.
The cheapest return price found within the last 5 days was £525 on Multiple Airlines (30 Dec–9 Jan).

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

Dublin (DUB) – chosen by Cheapflights users on 44% of one-stop itineraries from Chicago to London on Cheapflights.

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

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £564.

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

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 10h 21m.

Which airport typically offers the quickest stopover for flights from Chicago to London?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 56m.

How often are flights from Chicago to London delayed?

About 23% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 161 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 at night 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 22% of flights being delayed.

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

The best time to book flights from Chicago to London is 28 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.

Reviews of airlines servicing London

Read reviews from past customers who have flown with Aer Lingus,United Airlines, andAmerican Airlines 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.
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Aer Lingus
7.3
Good
1,851 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
United Airlines
7.3
Good
10,396 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
American Airlines
7.0
Good
12,183 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Iberia
7.0
Good
3,244 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
British Airways
6.7
Okay
8,269 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Overall

7.3

Comfort

7.2

Crew

8.1

Entertainment

7.1

Boarding

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Tadhg,Mar 2025

DUB - MAN

Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.

Related info for your journey

  • How long is the flight from Chicago to London?

    Scandinavian Airlines, Turkish Airlines, and Delta can get you from Chicago to London in just under 14h 50m. Your travel time can differ by up to 16h 50m. 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 Icelandair. Our recent data shows that you can find tickets from as low as £365 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £454 and £460 round-trip. These flights start at 44% lower than the current average price 3 months from now.

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

    £287 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on Lufthansa and British Airways, with prices starting from £292 and £297, 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: Royal Jordanian (85%), Air Canada (80%), Austrian Airlines (80%).

  • What are the cheapest flights from Chicago to London?

    On average you can expect to pay £752 for a flight from Chicago to London. The cheapest flight overall is £272 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £455.

  • 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, January is the cheapest month in which you can book a flight from Chicago to London (average of £466). Flying from Chicago to London in June is currently the most expensive (average of £1,032). 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?

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Watford
Kingston upon Thames
Dagenham
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Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Chicago to London

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£365Average£564FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£454Average£738FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£460Average£809FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£490Average£855FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£509Average£915FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£520Average£705FlexibilityNo cancel feeOn-time77%
Search Iberia flights
JetBlueCheapest£743Average£884FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

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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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