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

Our cheapest airline available from Chicago to London is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £455 on this airline. Additional options worth looking into are Iberia and Icelandair, starting at £456 and £456 round-trip. These flights start at 22% lower than the current average price 3 months from now.

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

£206 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on TAP AIR PORTUGAL and JetBlue, with prices starting from £207 and £208, respectively.

What is the cheapest day to fly from Chicago to London?

Travellers seeking maximum savings on their Chicago to London flight should consider departing on Wednesday mornings when fares are most often at their lowest. Wednesday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 £3,173 for a flight from Chicago to London. The cheapest flight overall is £286 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £411.

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 (87%), Air Canada (80%), Austrian Airlines (80%).

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

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

What is the cheapest day to fly round-trip from Chicago to London?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 23% on your flight compared to booking on days when demand is much higher.

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

To save on the cost of your flight from Chicago to London, book at least 49 days before your planned departure. Booking around this time can save you about 7% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £548 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £553.

What is the cheapest month to fly from Chicago to London?

Our data shows that February tends to be the cheapest month to fly to London from Chicago. Users have commonly found prices around £585 for the month, but tickets can be as low as £366. Due to multiple factors, prepare for potentially higher prices in June.

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.

£204+ Flights from Chicago to London

Cheapflights Tip: The best prices from Chicago to London are usually found in February or November, booked 68 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Chicago to London

Round-trip from	£455
One-way from	£204
Popular in	June
Cheapest in	February
Average price	£550
Good round-trip deal	£532 or less
Good one-way deal	£317 or less

Scandinavian Airlines
5/5-12/5
3 total stops
32h 20m total
Chicago to London

Search Deals

13/4
1 total stop
15h 24m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£102 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 2025

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

Find flight deals from Chicago to London

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 24 March 2025.

Mon 5/519:15ORD - LHR

1 stop17h 15mScandinavian Airlines

Mon 12/507:05LHR - ORD

2 stops15h 05mScandinavian Airlines

Deal found 24/3£455

Wed 7/521:08ORD - LGW

2 stops39h 47mMultiple Airlines

Wed 14/510:00LGW - ORD

1 stop36h 03mMultiple Airlines

Deal found 22/3£455

Sun 4/517:45ORD - LHR

Nonstop7h 35mIberia

Fri 16/509:15LHR - ORD

Nonstop8h 30mIberia

Deal found 24/3£456

Thu 1/519:25ORD - LGW

1 stop13h 15mIcelandair

Tue 6/515:40LGW - ORD

1 stop32h 35mIcelandair

Deal found 23/3£456

Wed 1/1022:15ORD - LHR

1 stop16h 05mIcelandair

Tue 7/1021:25LHR - ORD

1 stop26h 50mIcelandair

Deal found 22/3£457

Sun 6/415:45ORD - LHR

1 stop10h 15mAer Lingus

Tue 15/413:25LHR - ORD

1 stop11h 35mAer Lingus

Deal found 23/3£457

Wed 8/1018:00ORD - LHR

1 stop22h 00mTAP AIR PORTUGAL

Wed 22/1018:45LHR - ORD

1 stop23h 50mTAP AIR PORTUGAL

Deal found 24/3£458

Tue 15/411:30ORD - LHR

1 stop16h 30mMultiple Airlines

Mon 28/419:30LHR - ORD

1 stop23h 50mMultiple Airlines

Deal found 23/3£460

Wed 16/420:20ORD - LHR

Nonstop8h 10mFinnair

Tue 22/409:30LHR - ORD

1 stop14h 20mFinnair

Deal found 22/3£463

Sun 6/419:09MDW - LHR

1 stop12h 01mVirgin Atlantic

Tue 15/411:45LHR - MDW

1 stop12h 35mVirgin Atlantic

Deal found 23/3£474

Sun 6/416:00ORD - LHR

1 stop10h 35mAir Canada

Tue 15/414:05LHR - ORD

1 stop11h 55mAir Canada

Deal found 23/3£475

Wed 30/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Mon 19/512:10LHR - ORD

1 stop33h 45mUnited Airlines

Deal found 23/3£481

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 24 March 2025.

Mon 5/519:15ORD - LHR

1 stop17h 15mScandinavian Airlines

Mon 12/507:05LHR - ORD

2 stops15h 05mScandinavian Airlines

Deal found 24/3£455

Wed 7/521:08ORD - LGW

2 stops39h 47mMultiple Airlines

Wed 14/510:00LGW - ORD

1 stop36h 03mMultiple Airlines

Deal found 23/3£455

Sun 4/517:45ORD - LHR

Nonstop7h 35mIberia

Fri 16/514:25LHR - ORD

Nonstop8h 35mIberia

Deal found 24/3£456

Thu 1/519:25ORD - LGW

1 stop13h 15mIcelandair

Tue 6/515:40LGW - ORD

1 stop32h 35mIcelandair

Deal found 23/3£456

Sun 6/415:45ORD - LHR

1 stop10h 15mAer Lingus

Tue 15/413:25LHR - ORD

1 stop11h 35mAer Lingus

Deal found 23/3£457

Wed 16/420:20ORD - LHR

Nonstop8h 10mFinnair

Tue 22/409:30LHR - ORD

1 stop14h 20mFinnair

Deal found 22/3£463

Sun 6/419:09MDW - LHR

1 stop12h 01mVirgin Atlantic

Tue 15/411:45LHR - MDW

1 stop12h 35mVirgin Atlantic

Deal found 23/3£474

Sun 6/416:00ORD - LHR

1 stop10h 35mAir Canada

Tue 15/414:05LHR - ORD

1 stop11h 55mAir Canada

Deal found 23/3£475

Wed 30/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Mon 19/512:10LHR - ORD

1 stop33h 45mUnited Airlines

Deal found 23/3£481

Tue 22/418:38ORD - LGW

1 stop34h 02mBritish Airways

Tue 29/415:05LGW - ORD

1 stop32h 34mBritish Airways

Deal found 24/3£482

Wed 7/512:48MDW - LHR

1 stop11h 57mKLM

Wed 14/513:05LHR - MDW

1 stop14h 23mKLM

Deal found 23/3£485

Thu 8/511:45ORD - LGW

1 stop14h 25mAmerican Airlines

Thu 15/515:05LGW - ORD

2 stops22h 15mAmerican Airlines

Deal found 24/3£485

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 24 March 2025.

Sun 4/517:45ORD - LHR

Nonstop7h 35mIberia

Fri 16/509:15LHR - ORD

Nonstop8h 30mIberia

Deal found 24/3£456

Sun 6/416:55ORD - LHR

Nonstop7h 55mBritish Airways

Tue 15/411:05LHR - ORD

Nonstop8h 45mBritish Airways

Deal found 23/3£464

Sun 6/416:55ORD - LHR

Nonstop7h 55mFinnair

Tue 15/411:05LHR - ORD

Nonstop8h 45mFinnair

Deal found 23/3£475

Tue 22/421:20ORD - LHR

Nonstop8h 25mUnited Airlines

Wed 7/511:05LHR - ORD

Nonstop9h 05mUnited Airlines

Deal found 24/3£493

Wed 7/520:30ORD - LHR

Nonstop8h 00mAlaska Airlines

Wed 14/514:25LHR - ORD

Nonstop8h 35mAlaska Airlines

Deal found 23/3£705

Thu 15/516:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Wed 21/508:30LHR - ORD

Nonstop9h 05mAustrian Airlines

Deal found 23/3£738

Fri 16/521:20ORD - LHR

Nonstop8h 25mLufthansa

Tue 20/508:30LHR - ORD

Nonstop9h 05mLufthansa

Deal found 23/3£793

Last-minute flights from Chicago to London
Discover last-minute flight deals from Chicago to London. Data last updated 24 March 2025 and is based on user searches.

Fri 28/320:40ORD - LHR

2 stops16h 50mScandinavian Airlines

Mon 31/307:05LHR - ORD

2 stops17h 10mScandinavian Airlines

Deal found 23/3£472

Sun 30/320:50ORD - LHR

1 stop10h 35mAer Lingus

Wed 2/408:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 23/3£498

Mon 31/315:35ORD - LHR

1 stop12h 25mMultiple Airlines

Mon 7/417:10LHR - ORD

1 stop25h 00mMultiple Airlines

Deal found 24/3£497

Mon 31/318:35ORD - LGW

1 stop17h 15mSWISS

Mon 7/418:35LGW - ORD

1 stop23h 35mSWISS

Deal found 24/3£516

Mon 31/318:35ORD - LHR

1 stop12h 25mSWISS

Mon 7/420:05LHR - ORD

1 stop22h 05mSWISS

Deal found 22/3£519

Tue 1/419:30ORD - LHR

1 stop10h 25mIcelandair

Tue 8/421:25LHR - ORD

1 stop26h 55mIcelandair

Deal found 24/3£481

Wed 2/412:14ORD - LGW

1 stop15h 46mMultiple Airlines

Wed 9/421:20LGW - ORD

2 stops38h 25mMultiple Airlines

Deal found 24/3£482

Wed 2/419:30ORD - LGW

1 stop10h 15mIcelandair

Sun 20/415:40LGW - ORD

1 stop11h 35mIcelandair

Deal found 24/3£484

Wed 2/418:05ORD - LHR

Nonstop8h 15mUnited Airlines

Mon 7/413:45LHR - ORD

1 stop28h 25mUnited Airlines

Deal found 24/3£511

Wed 2/417:50ORD - LHR

Nonstop7h 30mFinnair

Tue 8/414:25LHR - ORD

Nonstop8h 35mFinnair

Deal found 23/3£517

Wed 2/411:30ORD - LHR

1 stop13h 00mAir Canada

Wed 9/409:30LHR - ORD

1 stop11h 25mAir Canada

Deal found 24/3£525

Wed 2/417:30ORD - LHR

1 stop11h 40mDelta

Tue 8/408:40LHR - ORD

2 stops15h 39mDelta

Deal found 23/3£526

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 24 March 2025.

Sun 13/412:46MDW - LGW

1 stop15h 24mMultiple Airlines

Deal found 24/3£204

Sat 26/405:55ORD - LGW

1 stop18h 25mMultiple Airlines

Deal found 23/3£204

Tue 1/419:30ORD - LHR

1 stop10h 25mIcelandair

Deal found 22/3£206

Sat 9/818:15ORD - LGW

1 stop33h 30mTAP AIR PORTUGAL

Deal found 22/3£207

Sun 30/313:24ORD - LHR

1 stop14h 06mJetBlue

Deal found 23/3£208

Fri 5/922:15ORD - LGW

1 stop31h 30mIcelandair

Deal found 22/3£208

Wed 23/405:55ORD - LHR

2 stops32h 25mMultiple Airlines

Deal found 24/3£210

Sat 2/818:15ORD - LHR

1 stop12h 30mTAP AIR PORTUGAL

Deal found 23/3£216

Tue 29/405:55ORD - LTN

2 stops30h 20mMultiple Airlines

Deal found 24/3£218

Wed 7/521:08ORD - SEN

2 stops36h 37mMultiple Airlines

Deal found 23/3£224

Wed 7/521:08ORD - STN

3 stops43h 12mMultiple Airlines

Deal found 23/3£224

Mon 2/609:40MDW - LTN

2 stops24h 20mMultiple Airlines

Deal found 23/3£257

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

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/5

19:15-18:30

1 stop17h 15m

London Heathrow

Mon 12/5

07:05-16:10

2 stops15h 05m

£455

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 7/5

21:08-18:55

2 stops39h 47m

London Gatwick

Wed 14/5

10:00-16:03

1 stop36h 03m

£455

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 4/5

17:45-07:20

Nonstop7h 35m

London Heathrow

Fri 16/5

14:25-17:00

Nonstop8h 35m

£456

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 1/5

19:25-14:40

1 stop13h 15m

London Gatwick

Tue 6/5

15:40-18:15

1 stop32h 35m

£456

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 6/4

15:45-08:00

1 stop10h 15m

London Heathrow

Tue 15/4

13:25-19:00

1 stop11h 35m

£457

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 15/4

11:30-10:00

1 stop16h 30m

London Heathrow

Mon 28/4

19:30-13:20

1 stop23h 50m

£460

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 24/4

19:25-20:20

1 stop18h 55m

London Heathrow

Mon 28/4

21:25-18:15

1 stop26h 50m

£461

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 16/4

20:20-10:30

Nonstop8h 10m

London Heathrow

Tue 22/4

09:30-17:50

1 stop14h 20m

£463

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 6/4

19:09-13:10

1 stop12h 01m

London Heathrow

Tue 15/4

11:45-18:20

1 stop12h 35m

£474

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 6/4

16:00-08:35

1 stop10h 35m

London Heathrow

Tue 15/4

14:05-20:00

1 stop11h 55m

£475

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 60 results

...

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?

The best time to book flights from Chicago to London is 68 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, January is the cheapest month in which you can book a flight from Chicago to London (average of £112). Flying from Chicago to London in August is currently the most expensive (average of £164). 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?

Unlike at midday, when flights are generally more expensive, you can save up to 27% on flights from Chicago to London by exploring options for tickets in the morning.

Weekly flight availability from Chicago to London

The most flights from CHI to LON are scheduled on a Monday (38 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in London by month

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.

Temperature in London by month

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).

Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, Porter Airlines and KLM 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.

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,888 reviews

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

7.9

Good

275 reviews

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,318 reviews

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,266 reviews

Delta

8.0

Very Good

7,888 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Chicago to London round-trip?
Our cheapest airline available from Chicago to London is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £455 on this airline. Additional options worth looking into are Iberia and Icelandair, starting at £456 and £456 round-trip. These flights start at 22% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Chicago to London one-way?
£206 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on TAP AIR PORTUGAL and JetBlue, with prices starting from £207 and £208, 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 (87%), Air Canada (80%), Austrian Airlines (80%).
What are the cheapest flights from Chicago to London?
On average you can expect to pay £3,173 for a flight from Chicago to London. The cheapest flight overall is £286 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £411.
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 £112). Flying from Chicago to London in August is currently the most expensive (average of £164). 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

Hounslow

Deal

Milton Keynes

Gatwick

Croydon

Luton

Slough

Eastbourne

Wembley

Hayes

Ilford

Crawley

Southend-on-Sea

Winchester

Maidstone

Ipswich

Watford

Southall

Dartford

Folkestone

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Chicago to London

Top 6 airlines flying from Chicago to London

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£370	Average£717	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£397	Average£777	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£464	Average£646	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£494	Average£675	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£503	Average£860	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£515	Average£729	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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 £204

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Chicago to London are usually found in February or November, booked 68 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Chicago to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 24 March 2025.

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 24 March 2025.

Cheapflights Fare Finder

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

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 21 March 2025.

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 24 March 2025.

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 24 March 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

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 24 March 2025.

Read reviews from past customers who have flown Delta, Porter Airlines and KLM 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

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.

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

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

What are the most popular routes from Chicago to London?

What are the most reliable airlines from Chicago to London?

What are the cheapest flights from Chicago to London?

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

How can I find direct flights from Chicago to London?

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

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Top 6 airlines flying from Chicago to London

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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 24 March 2025.