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$223+ Cheap flights from Chicago (CHI) to the United Kingdom

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Chicago to United Kingdom

Keep the following information in mind while searching for Chicago to United Kingdom flight deals. Data was last updated July 31, 2025.

Round-trip from

$518
(Kiwi.com)

One-way from

$223
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,039

Good round-trip deal

$622 or less

Good one-way deal

$388 or less
From Chicago (CHI) to United Kingdom
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One-way flight from Chicago (CHI) to United Kingdom
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Highest demand for flights based on searches. 21% potential increase in price ($209 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Chicago (CHI) to United Kingdom.
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Price to beat on a one-way flight from Chicago (CHI) to United Kingdom.
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Find flight deals from Chicago to United Kingdom

Cheapest flights from Chicago to United Kingdom
Explore the most affordable flight options available from Chicago to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/294:20 pmORD - LHR
1 stop16h 00mAustrian Airlines
Tue 10/216:00 amLHR - ORD
1 stop13h 20mAustrian Airlines
Deal found 7/31$518
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/253:35 pmORD - LHR
1 stop13h 00mDelta
Fri 12/59:00 amLHR - ORD
1 stop12h 10mDelta
Deal found 7/31$519
This Booking.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:15 pmORD - LGW
1 stop10h 25mIcelandair
Mon 9/153:40 pmLGW - ORD
1 stop32h 35mIcelandair
Deal found 7/31$519
This Icelandair deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:30 pmORD - LHR
1 stop10h 20mIcelandair
Tue 11/1812:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 7/31$520
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2812:05 pmORD - LGW
1 stop16h 05mMultiple Airlines
Tue 10/72:00 pmLGW - ORD
2 stops29h 09mMultiple Airlines
Deal found 7/30$520
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
Tue 10/218:30 amLHR - ORD
Nonstop9h 00mUnited Airlines
Deal found 7/31$521
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:05 pmORD - LCY
1 stop11h 25mSWISS
Mon 10/277:10 pmLCY - ORD
1 stop27h 10mSWISS
Deal found 7/29$522
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:05 pmORD - LGW
1 stop16h 45mSWISS
Wed 8/206:35 pmLGW - ORD
1 stop23h 35mSWISS
Deal found 7/30$522
This Gotogate deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:15 pmORD - GLA
1 stop9h 10mIcelandair
Wed 10/152:20 pmGLA - ORD
1 stop9h 55mIcelandair
Deal found 7/31$522
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/107:07 pmMDW - LHR
1 stop12h 23mDelta
Tue 8/191:05 pmLHR - MDW
1 stop14h 39mDelta
Deal found 7/30$523
This Mytrip deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:55 amORD - STN
3 stops19h 55mMultiple Airlines
Sun 10/196:45 amSTN - ORD
2 stops19h 37mMultiple Airlines
Deal found 7/31$523
This Iberia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/93:04 pmORD - LHR
1 stop9h 56mIberia
Thu 11/2011:00 amLHR - ORD
Nonstop8h 50mIberia
Deal found 7/31$526

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Chicago to the United Kingdom that are best for you.

Fly from

Chicago

Fly to

United Kingdom

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/29

4:20 pm-2:20 pm

1 stop16h 00m

London Heathrow

Tue 10/21

6:00 am-1:20 pm

1 stop13h 20m

$518

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 11/25

3:35 pm-10:35 am

1 stop13h 00m

London Heathrow

Fri 12/5

9:00 am-3:10 pm

1 stop12h 10m

$519

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 9/11

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Mon 9/15

3:40 pm-6:15 pm

1 stop32h 35m

$519

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 9/28

12:05 pm-10:10 am

1 stop16h 05m

London Gatwick

Tue 10/7

2:00 pm-1:09 pm

2 stops29h 09m

$520

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 11/14

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Sat 11/22

12:15 pm-5:20 pm

1 stop11h 05m

$520

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 10/1

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Thu 10/16

8:30 am-11:30 am

Nonstop9h 00m

$521

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 10/20

7:05 pm-12:30 pm

1 stop11h 25m

London City

Mon 10/27

7:10 pm-5:20 pm

1 stop27h 10m

$522

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 8/11

7:05 pm-5:50 pm

1 stop16h 45m

London Gatwick

Wed 8/20

6:35 pm-12:10 pm

1 stop23h 35m

$522

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Sun 10/5

10:15 pm-1:25 pm

1 stop9h 10m

Glasgow Intl

Wed 10/15

2:20 pm-6:15 pm

1 stop9h 55m

$522

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 8/10

7:07 pm-1:30 pm

1 stop12h 23m

London Heathrow

Tue 8/19

1:05 pm-9:44 pm

1 stop14h 39m

$523

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Chicago with our price prediction graph.
Estimated round-trip 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 the United Kingdom

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

Currently, November is the cheapest month in which you can book a flight from Chicago to United Kingdom (average of $661). Flying from Chicago to United Kingdom in June is currently the most expensive (average of $1,097). 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 GB?

Find hourly flight availability from Chicago to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Chicago to United Kingdom, 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 United Kingdom

Explore weekly flight availability from Chicago to United Kingdom. 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 July 31, 2025.

The most flights from CHI to GB0 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 (52 on average).

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Austrian Airlines from Chicago to the United Kingdom to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Chicago to United Kingdom. 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 to fly from Chicago to United Kingdom one-way?

    The cheapest airlines for a one-way flight from Chicago to United Kingdom are TAP AIR PORTUGAL ($224), WestJet ($233), and Icelandair ($262).

  • What are the most popular routes from Chicago to United Kingdom?

    While some choose either Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City, Chicago O'Hare Intl - London Heathrow is the most popular route from Chicago to United Kingdom.

  • What are the most reliable airlines from Chicago to United Kingdom?

    Consider Air Canada (66%), Austrian Airlines (66%) or United Airlines (66%) when booking your flight. These represent the most reliable airlines when flying from Chicago to United Kingdom.

  • What are the cheapest flights from Chicago to United Kingdom?

    While on average a flight from Chicago to United Kingdom is generally $2,829, our data shows the cheapest flight currently is $210. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $456 for that flight.

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

    Yes. In addition to deals on Chicago to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to United Kingdom?

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

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

    Yes. Cheapflights offers flight deals from Chicago to United Kingdom 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 United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from Chicago to United Kingdom (average of $661). Flying from Chicago to United Kingdom in June is currently the most expensive (average of $1,097). 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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Alternative routes for Chicago to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
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O'Hare Intl to Porto flights

Top 10 airlines flying from Chicago to United Kingdom

Discover the top 10 airlines that operate flights from Chicago to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$736FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$671FlexibilityNo cancel feeOn-time79%
DeltaCheapest$345Average$1,033FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$358Average$597FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$430Average$923FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$470Average$656FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$508Average$804FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$531Average$819FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$568Average$746FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$576Average$765FlexibilityNo cancel feeOn-time71%

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