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 £456 on this airline. Additional options worth looking into are Icelandair and Iberia, starting at £459 and £460 round-trip. These flights start at 18% lower than the current average price 3 months from now.

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

£213 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 £226 and £257, 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 £3,047 for a flight from Chicago to London. The cheapest flight overall is £265 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £296.

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 (88%), Gulf Air (82%), Malaysia Airlines (79%).

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 24% 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 60 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 £536 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £539.

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 £561 for the month, but tickets can be as low as £354. 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.

£213+ Flights from Chicago to London - Compare & Save Big

Cheapflights Tip: The best prices from Chicago to London are usually found in February or November, booked 84 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Chicago to London

Round-trip from	£456
One-way from	£213
Popular in	June
Cheapest in	February
Average price	£503
Good round-trip deal	£508 or less
Good one-way deal	£291 or less

Scandinavian Airlines
9/9-13/9
2 total stops
49h 35m total
Chicago to London

Search Deals

Icelandair
13/8
1 total stop
31h 40m total
Chicago to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£86 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 29 April 2025.

Tue 9/919:15ORD - LHR

1 stop20h 25mScandinavian Airlines

Sat 13/917:00LHR - ORD

1 stop29h 10mScandinavian Airlines

Deal found 28/4£456

Thu 6/1118:30ORD - LGW

1 stop10h 25mIcelandair

Tue 25/1111:55LGW - ORD

1 stop11h 25mIcelandair

Deal found 28/4£457

Wed 1/1020:40ORD - LHR

Nonstop7h 50mIberia

Wed 15/1009:15LHR - ORD

Nonstop8h 35mIberia

Deal found 29/4£460

Sun 24/818:15MDW - LHR

1 stop10h 55mDelta

Wed 10/911:20LHR - MDW

1 stop12h 38mDelta

Deal found 29/4£461

Tue 19/806:45ORD - LGW

1 stop18h 15mMultiple Airlines

Wed 27/810:00LGW - ORD

1 stop18h 47mMultiple Airlines

Deal found 28/4£461

Fri 3/1019:25ORD - LHR

1 stop10h 30mIcelandair

Mon 13/1021:25LHR - ORD

1 stop26h 50mIcelandair

Deal found 29/4£462

Sun 4/515:45ORD - LHR

1 stop10h 15mAer Lingus

Tue 13/508:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 29/4£465

Mon 22/918:10ORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Tue 21/1016:25LGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 29/4£466

Wed 10/918:00ORD - LHR

Nonstop8h 20mMultiple Airlines

Wed 8/1006:00LHR - ORD

1 stop12h 10mMultiple Airlines

Deal found 29/4£468

Tue 13/515:40ORD - LHR

1 stop11h 40mLufthansa

Wed 21/511:30LHR - ORD

1 stop14h 25mLufthansa

Deal found 28/4£476

Wed 20/817:45ORD - LHR

Nonstop7h 35mFinnair

Tue 9/909:15LHR - ORD

Nonstop8h 35mFinnair

Deal found 29/4£477

Tue 23/919:15ORD - STN

1 stop12h 45mMultiple Airlines

Tue 14/1008:25STN - ORD

1 stop13h 45mMultiple Airlines

Deal found 28/4£477

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 29 April 2025.

Tue 9/919:15ORD - LHR

1 stop20h 25mScandinavian Airlines

Sat 13/917:00LHR - ORD

1 stop29h 10mScandinavian Airlines

Deal found 28/4£456

Fri 3/1019:25ORD - LGW

1 stop13h 15mIcelandair

Mon 13/1015:40LGW - ORD

1 stop32h 35mIcelandair

Deal found 29/4£459

Wed 1/1020:40ORD - LHR

Nonstop7h 50mIberia

Wed 15/1009:15LHR - ORD

Nonstop8h 35mIberia

Deal found 29/4£460

Tue 23/913:05MDW - LHR

1 stop11h 40mDelta

Fri 17/1011:45LHR - MDW

1 stop12h 51mDelta

Deal found 29/4£461

Tue 19/806:45ORD - LGW

1 stop18h 15mMultiple Airlines

Wed 27/810:00LGW - ORD

1 stop18h 47mMultiple Airlines

Deal found 28/4£461

Mon 22/918:10ORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Tue 21/1016:25LGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 29/4£466

Mon 12/521:15ORD - LHR

1 stop11h 40mAer Lingus

Tue 20/508:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 28/4£469

Tue 13/515:40ORD - LHR

1 stop11h 40mLufthansa

Wed 21/511:30LHR - ORD

1 stop14h 25mLufthansa

Deal found 28/4£476

Wed 20/817:45ORD - LHR

Nonstop7h 35mFinnair

Tue 9/909:15LHR - ORD

Nonstop8h 35mFinnair

Deal found 29/4£477

Wed 24/908:40ORD - LHR

1 stop15h 50mJetBlue

Thu 2/1008:25LHR - ORD

1 stop15h 10mJetBlue

Deal found 28/4£486

Tue 19/821:15ORD - LHR

Nonstop7h 40mBritish Airways

Thu 4/909:15LHR - ORD

Nonstop8h 35mBritish Airways

Deal found 29/4£489

Mon 11/807:00ORD - LGW

1 stop21h 00mVirgin Atlantic

Wed 20/812:00LGW - ORD

2 stops17h 55mVirgin Atlantic

Deal found 28/4£492

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 29 April 2025.

Tue 19/817:45ORD - LHR

Nonstop7h 35mIberia

Wed 27/809:15LHR - ORD

Nonstop8h 35mIberia

Deal found 29/4£460

Wed 20/817:45ORD - LHR

Nonstop7h 35mFinnair

Tue 9/909:15LHR - ORD

Nonstop8h 35mFinnair

Deal found 29/4£477

Wed 10/918:00ORD - LHR

Nonstop8h 20mLufthansa

Wed 8/1014:10LHR - ORD

Nonstop9h 10mLufthansa

Deal found 28/4£480

Thu 25/919:10ORD - LHR

Nonstop7h 55mBritish Airways

Tue 7/1012:15LHR - ORD

Nonstop8h 35mBritish Airways

Deal found 28/4£486

Sun 28/921:25ORD - LHR

Nonstop8h 20mUnited Airlines

Thu 16/1011:05LHR - ORD

Nonstop9h 05mUnited Airlines

Deal found 28/4£510

Wed 6/816:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Thu 21/808:30LHR - ORD

Nonstop8h 55mAustrian Airlines

Deal found 28/4£659

Sun 18/518:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Fri 13/614:10LHR - ORD

Nonstop9h 10mMultiple Airlines

Deal found 28/4£742

Last-minute flights from Chicago to London
Discover last-minute flight deals from Chicago to London. Data last updated 29 April 2025 and is based on user searches.

Tue 29/415:35ORD - LHR

1 stop12h 25mAir Canada

Tue 6/508:45LHR - ORD

2 stops15h 37mAir Canada

Deal found 28/4£491

Wed 30/422:20ORD - LHR

Nonstop7h 55mFinnair

Wed 7/514:25LHR - ORD

Nonstop8h 35mFinnair

Deal found 29/4£478

Wed 30/418:35ORD - LHR

1 stop17h 15mSWISS

Mon 5/520:05LHR - ORD

1 stop22h 05mSWISS

Deal found 28/4£483

Fri 2/522:15ORD - LGW

1 stop31h 30mIcelandair

Wed 7/515:40LGW - ORD

1 stop11h 35mIcelandair

Deal found 28/4£467

Sun 4/522:15ORD - LGW

1 stop31h 30mMultiple Airlines

Tue 13/513:00LGW - ORD

2 stops24h 27mMultiple Airlines

Deal found 29/4£460

Sun 4/522:15ORD - LGW

1 stop31h 30mIcelandair

Tue 13/515:40LGW - ORD

1 stop32h 35mIcelandair

Deal found 29/4£460

Sun 4/515:45ORD - LHR

1 stop10h 15mAer Lingus

Tue 13/508:50LHR - ORD

1 stop11h 10mAer Lingus

Deal found 29/4£465

Sun 4/510:25ORD - LHR

1 stop14h 20mVirgin Atlantic

Tue 13/508:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Deal found 29/4£480

Sun 4/521:15ORD - LHR

Nonstop7h 45mIberia

Tue 13/511:05LHR - ORD

Nonstop8h 45mIberia

Deal found 29/4£480

Sun 4/510:40ORD - LHR

1 stop13h 50mAir Canada

Tue 13/509:30LHR - ORD

2 stops15h 24mAir Canada

Deal found 29/4£500

Sun 4/521:15ORD - LHR

Nonstop7h 45mIberia

Tue 13/511:05LHR - ORD

Nonstop8h 45mIberia

Deal found 29/4£480

Mon 5/508:40ORD - LHR

2 stops15h 50mMultiple Airlines

Mon 12/520:05LHR - ORD

1 stop22h 05mMultiple Airlines

Deal found 27/4£483

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 29 April 2025.

Wed 13/822:15ORD - LHR

1 stop31h 40mIcelandair

Deal found 29/4£213

Sun 4/522:15ORD - LGW

1 stop31h 30mIcelandair

Deal found 29/4£213

Sun 1/616:43ORD - STN

2 stops15h 37mMultiple Airlines

Deal found 28/4£216

Sun 1/609:40MDW - LGW

2 stops39h 55mMultiple Airlines

Deal found 28/4£222

Sun 20/718:00ORD - LGW

2 stops33h 05mMultiple Airlines

Deal found 28/4£224

Sun 29/609:40MDW - LTN

2 stops31h 15mMultiple Airlines

Deal found 29/4£225

Mon 28/718:10ORD - LHR

2 stops18h 20mMultiple Airlines

Deal found 28/4£225

Fri 25/718:00ORD - LHR

1 stop12h 45mTAP AIR PORTUGAL

Deal found 27/4£226

Sun 1/616:43ORD - LTN

2 stops24h 12mMultiple Airlines

Deal found 28/4£228

Sun 1/609:40MDW - LHR

2 stops39h 45mMultiple Airlines

Deal found 28/4£247

Sat 12/718:15ORD - LGW

1 stop33h 30mTAP AIR PORTUGAL

Deal found 28/4£247

Tue 14/1013:35ORD - LHR

1 stop13h 55mJetBlue

Deal found 29/4£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

Tue 9/9

19:15-21:40

1 stop20h 25m

London Heathrow

Sat 13/9

17:00-16:10

1 stop29h 10m

£456

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 3/10

19:25-14:40

1 stop13h 15m

London Gatwick

Mon 13/10

15:40-18:15

1 stop32h 35m

£459

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 1/10

20:40-10:30

Nonstop7h 50m

London Heathrow

Wed 15/10

09:15-11:50

Nonstop8h 35m

£460

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 23/9

13:05-06:45

1 stop11h 40m

London Heathrow

Thu 16/10

11:20-17:58

1 stop12h 38m

£461

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 19/8

06:45-07:00

1 stop18h 15m

London Gatwick

Wed 27/8

10:00-22:47

1 stop18h 47m

£461

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 3/10

22:15-20:20

1 stop16h 05m

London Heathrow

Mon 13/10

21:25-18:15

1 stop26h 50m

£462

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 22/9

18:10-20:25

2 stops20h 15m

London Gatwick

Tue 21/10

16:25-16:10

1 stop29h 45m

£466

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 10/9

13:10-07:15

1 stop12h 05m

London Heathrow

Wed 8/10

06:00-12:10

1 stop12h 10m

£468

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/5

21:15-14:55

1 stop11h 40m

London Heathrow

Tue 20/5

08:50-14:00

1 stop11h 10m

£469

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 13/5

15:40-09:20

1 stop11h 40m

London Heathrow

Wed 21/5

11:30-19:55

1 stop14h 25m

£476

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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 84 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 28% on flights from Chicago to London by exploring options for tickets in the afternoon.

Weekly flight availability from Chicago to London

The most flights from CHI to LON are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (50 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

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

8.0

Very Good

285 reviews

Delta

8.0

Very Good

7,929 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

1,333 reviews

Delta

8.0

Very Good

7,929 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

1,273 reviews

Delta

8.0

Very Good

7,929 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.

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very Good

7,929 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 £456 on this airline. Additional options worth looking into are Icelandair and Iberia, starting at £459 and £460 round-trip. These flights start at 18% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Chicago to London one-way?
£213 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 £226 and £257, 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 (88%), Gulf Air (82%), Malaysia Airlines (79%).
What are the cheapest flights from Chicago to London?
On average you can expect to pay £3,047 for a flight from Chicago to London. The cheapest flight overall is £265 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £296.
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

Deal

Hounslow

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Ilford

Hayes

Southend-on-Sea

Crawley

Wembley

Ipswich

Maidstone

Winchester

Folkestone

Dartford

Watford

Chichester

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£358	Average£677	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£384	Average£765	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£448	Average£609	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£477	Average£588	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£487	Average£831	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£498	Average£705	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 £213

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 13/8. 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 84 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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 29 April 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 29 April 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 25 April 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 29 April 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 29 April 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 29 April 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.

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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 29 April 2025.