How long is the flight from Chicago to London?

TAP AIR PORTUGAL, Scandinavian Airlines, and United Airlines can get you from Chicago to London in just under 8h 10m. Your travel time can differ by up to 23h 35m. 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 £369 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £459 and £466 round-trip. These flights start at 43% lower than the current average price 3 months from now.

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

£285 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Iberia and British Airways, with prices starting from £290 and £296, respectively.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 City.

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 £275 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £461.

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 (80%), Aer Lingus (74%), Malaysia Airlines (73%).

What are the most popular airlines that fly from Chicago to London?

Consider British Airways, Aer Lingus or United Airlines when booking your flight. These represent the most popular airlines when flying from Chicago to London.

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.

£242+ Cheap Flights from Chicago to London

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

Best

Direct

Last-minute

One-way

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 5 October 2026.

Sun 6/1219:10 -

2 stops15h 50m

Thu 10/1206:40 -

1 stop16h 05m

Deal found 30/9£546

Wed 28/1020:00 -

1 stop32h 50m

Tue 3/1116:35 -

1 stop28h 55m

Deal found 30/9£546

Wed 28/1020:00 -

1 stop34h 25m

Tue 3/1118:30 -

1 stop27h 00m

Deal found 30/9£547

Sun 18/1019:15 -

1 stop17h 10m

Mon 2/1107:00 -

1 stop15h 45m

Deal found 1/10£547

Fri 30/1020:10 -

1 stop22h 05m

Mon 2/1106:45 -

1 stop16h 00m

Deal found 1/10£547

Fri 23/1019:15 -

2 stops40h 10m

Sun 25/1021:05 -

2 stops49h 40m

Deal found 30/9£547

Mon 2/1119:10 -

1 stop12h 15m

Tue 10/1107:00 -

1 stop15h 45m

Deal found 4/10£547

Sun 1/1119:10 -

1 stop14h 30m

Sat 14/1106:15 -

1 stop16h 30m

Deal found 4/10£547

Tue 24/1118:30 -

1 stop10h 20m

Wed 2/1220:35 -

1 stop26h 45m

Deal found 1/10£548

Tue 3/1119:10 -

1 stop12h 15m

Sat 14/1107:00 -

1 stop15h 45m

Deal found 4/10£548

Sun 15/1106:00 -

2 stops22h 50m

Mon 23/1106:45 -

1 stop16h 00m

Deal found 30/9£548

Mon 2/1118:30 -

1 stop10h 20m

Wed 18/1112:15 -

1 stop11h 05m

Deal found 30/9£549

Best flights from Chicago to London
Discover carefully curated flight deals from Chicago to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Sun 6/1220:10 -

2 stops18h 25m

Thu 17/1216:00 -

1 stop29h 30m

Deal found 30/9£592

Fri 12/319:10 -

2 stops31h 45m

Fri 19/310:20 -

1 stop12h 25m

Deal found 4/10£622

Tue 12/111:45 -

1 stop16h 10m

Tue 19/117:20 -

1 stop22h 40m

Deal found 3/10£627

Tue 12/121:50 -

Nonstop8h 10m

Tue 19/106:50 -

1 stop11h 20m

Deal found 3/10£649

Mon 4/113:30 -

1 stop10h 50m

Wed 13/108:40 -

1 stop11h 45m

Deal found 4/10£653

Fri 6/1118:25 -

1 stop15h 20m

Thu 19/1116:45 -

2 stops22h 42m

Deal found 30/9£709

Fri 11/1218:35 -

Nonstop8h 00m

Wed 16/1212:35 -

Nonstop9h 00m

Deal found 4/10£737

Tue 17/1113:00 -

2 stops38h 25m

Tue 1/1216:35 -

1 stop28h 55m

Deal found 2/10£741

Sat 2/121:50 -

Nonstop7h 45m

Wed 13/111:00 -

Nonstop8h 45m

Deal found 4/10£748

Fri 6/1121:35 -

2 stops14h 15m

Mon 9/1108:35 -

2 stops15h 40m

Deal found 2/10£1,009

Mon 11/111:45 -

1 stop22h 35m

Wed 20/110:55 -

1 stop29h 05m

Deal found 30/9£628

Thu 11/215:45 -

Nonstop8h 10m

Mon 15/212:05 -

1 stop34h 10m

Deal found 2/10£686

Fri 6/1120:10 -

2 stops30h 10m

Wed 11/1109:35 -

2 stops59h 55m

Deal found 2/10£707

Mon 22/312:45 -

1 stop22h 35m

Tue 30/317:45 -

1 stop21h 50m

Deal found 3/10£650

Thu 5/1118:25 -

1 stop15h 20m

Mon 9/1110:00 -

1 stop12h 15m

Deal found 4/10£781

Fri 29/107:05 -

1 stop18h 05m

Fri 12/207:40 -

Nonstop9h 05m

Deal found 2/10£714

Sun 18/1011:25 -

1 stop16h 30m

Wed 28/1010:55 -

1 stop29h 05m

Deal found 1/10£651

Wed 6/119:00 -

1 stop14h 05m

Wed 13/109:35 -

2 stops59h 55m

Deal found 4/10£737

Fri 16/1017:10 -

1 stop16h 50m

Tue 20/1017:00 -

2 stops22h 27m

Deal found 3/10£867

Sat 14/1121:00 -

1 stop18h 20m

Wed 25/1107:40 -

Nonstop9h 05m

Deal found 2/10£723

Mon 2/1112:45 -

1 stop21h 35m

Tue 10/1117:20 -

1 stop31h 00m

Deal found 2/10£661

Fri 6/1120:10 -

2 stops30h 10m

Tue 10/1121:20 -

2 stops24h 10m

Deal found 3/10£745

Wed 30/1221:50 -

Nonstop8h 10m

Fri 8/107:30 -

1 stop13h 50m

Deal found 2/10£731

Wed 9/1217:46 -

2 stops34h 04m

Sun 13/1209:05 -

3 stops37h 37m

Deal found 30/9£981

Thu 25/312:45 -

1 stop22h 35m

Sat 3/410:50 -

1 stop28h 45m

Deal found 2/10£676

Tue 29/1211:45 -

1 stop28h 50m

Sun 17/117:25 -

1 stop22h 35m

Deal found 2/10£680

Sat 7/1105:00 -

1 stop10h 20m

Tue 10/1107:40 -

Nonstop9h 05m

Deal found 3/10£760

Thu 3/1211:45 -

1 stop16h 10m

Mon 7/1210:55 -

1 stop37h 25m

Deal found 30/9£681

Sun 13/1217:45 -

Nonstop8h 10m

Sun 20/1207:40 -

Nonstop9h 05m

Deal found 3/10£770

Thu 29/1012:45 -

1 stop16h 10m

Wed 11/1110:55 -

1 stop37h 25m

Deal found 4/10£687

Find flight deals from Chicago to London

Round-trip from	£546
One-way from	£242
Popular in	June
Cheapest in	February
Average price	£613
Good round-trip deal	£859 or less
Good one-way deal	£281 or less

Scandinavian Airlines
6/12-10/12
3 total stops
31h 55m total
Chicago to London

Search Deals

JetBlue
16/10-31/12
1 total stop
21h 20m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 21% potential increase in price (£136 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sun 10/1

18:30-15:40

2 stops15h 10m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£244

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Mon 4/1

21:50-12:00

Nonstop8h 10m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£245

Fastest return journey

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Tue 5/1

21:50-11:35

Nonstop7h 45m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£246

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Mon 26/10

13:00-06:55

1 stop12h 55m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£248

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Tue 5/1

12:15-09:55

2 stops15h 40m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£248

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Tue 3/11

13:00-06:55

1 stop11h 55m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£248

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Sun 14/2

18:25-15:45

1 stop15h 20m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£248

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Mon 15/2

10:40-09:00

2 stops16h 20m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£252

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Wed 17/2

10:40-09:00

2 stops16h 20m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£252

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Wed 3/2

10:40-09:00

2 stops16h 20m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£252

Flights are sorted by cheapest return flights first.

Deals found on 30/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

CHI-LON

ORD-STN

ORD-LHR

ORD-LGW

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

CHI-LON

ORD-STN

ORD-LHR

ORD-LGW

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 £484). Flying from Chicago to London in June is currently the most expensive (average of £1,044). 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.

Weekly flight availability from Chicago to London

The most flights from CHI to LON are scheduled on a Friday (56 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (31 on average).

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 £525 and £737 in December.
The cheapest return price found within the last 5 days was £546 on Scandinavian Airlines (6 Dec–10 Dec).

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

Dublin (DUB) – chosen by Cheapflights users on 45% 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 £570.

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 65 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 United Airlines,Aer Lingus, 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.

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

United Airlines

7.4

Good

10,281 reviews

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

Aer Lingus

7.3

Good

1,812 reviews

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

American Airlines

7.0

Good

12,131 reviews

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

Iberia

7.0

Good

3,256 reviews

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

British Airways

6.7

Okay

8,245 reviews

United Airlines

7.4

Good

10,281 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Dawn,Aug 2026

ORD - DEN

Related info for your journey

How long is the flight from Chicago to London?
TAP AIR PORTUGAL, Scandinavian Airlines, and United Airlines can get you from Chicago to London in just under 8h 10m. Your travel time can differ by up to 23h 35m. 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 £369 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £459 and £466 round-trip. These flights start at 43% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Chicago to London one-way?
£285 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Iberia and British Airways, with prices starting from £290 and £296, 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 City.
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 (80%), Aer Lingus (74%), Malaysia Airlines (73%).
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 £275 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £461.
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 £484). Flying from Chicago to London in June is currently the most expensive (average of £1,044). 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 Chicago to London

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£369	Average£570	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£459	Average£738	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£466	Average£818	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
American Airlines	Cheapest£495	Average£865	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	Cheapest£515	Average£925	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Iberia	Cheapest£526	Average£706	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
JetBlue	Cheapest£751	Average£894	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights

Fly with Cheapflights

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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Cheap flights from Chicago to London from £242

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Chicago to London

Cheapest flights from Chicago to LondonExplore 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 5 October 2026.

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 5 October 2026.

Best flights from Chicago to LondonDiscover carefully curated flight deals from Chicago to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Discover carefully curated flight deals from Chicago to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Direct flights from Chicago to LondonExplore direct flight options from Chicago to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Explore direct flight options from Chicago to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Last-minute flights from Chicago to LondonDiscover last-minute flight deals from Chicago to London. Data last updated 5 October 2026 and is based on user searches.

Discover last-minute flight deals from Chicago to London. Data last updated 5 October 2026 and is based on user searches.

One-way flights from Chicago to LondonSearch for one-way flight options from Chicago to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Search for one-way flight options from Chicago to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Find flight deals from Chicago to London

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One-way from

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

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.

Cheapflights Insights

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

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 5 October 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 5 October 2026.

The most flights from CHI to LON are scheduled on a Friday (56 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (31 on average).

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 £525 and £737 in December.The cheapest return price found within the last 5 days was £546 on Scandinavian Airlines (6 Dec–10 Dec).

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.

Dublin (DUB) – chosen by Cheapflights users on 45% 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.

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £570.

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 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?

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 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 65 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 United Airlines,Aer Lingus, 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.

Related info for your journey

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

Travelling to a place near London?

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Alternative routes for Chicago to London

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Complete your trip

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Direct flights to England

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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 5 October 2026.

Best flights from Chicago to London
Discover carefully curated flight deals from Chicago to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Direct flights from Chicago to London
Explore direct flight options from Chicago to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Last-minute flights from Chicago to London
Discover last-minute flight deals from Chicago to London. Data last updated 5 October 2026 and is based on user searches.

One-way flights from Chicago to London
Search for one-way flight options from Chicago to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Chicago to London flights typically cost between £525 and £737 in December.
The cheapest return price found within the last 5 days was £546 on Scandinavian Airlines (6 Dec–10 Dec).