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$172+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap 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 January 28, 2026.

This CrystalTravel deal was found by Cheapflights users on 1/26. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Mon 3/912:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/26$479
This CrystalTravel deal was found by Cheapflights users on 1/27. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Mon 3/212:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/27$489
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Wed 3/1812:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/25$493
This FlightHub deal was found by Cheapflights users on 1/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/97:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Fri 3/1312:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/25$497
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Tue 3/312:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/27$499
This Mytrip deal was found by Cheapflights users on 1/25. 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.
Sun 3/87:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Thu 3/1212:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/25$500
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:30 pm
ORD
-
MAN
1 stop10h 15m
Icelandair
Fri 2/2711:55 am
MAN
-
ORD
1 stop11h 25m
Icelandair
Deal found 1/27$500
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Thu 3/512:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/27$506
This Booking.com deal was found by Cheapflights users on 1/27. 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.
Tue 3/247:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
Tue 3/312:20 pm
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 1/27$509
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/46:30 pm
ORD
-
MAN
1 stop10h 30m
Icelandair
Wed 2/1111:55 am
MAN
-
ORD
1 stop11h 25m
Icelandair
Deal found 1/27$509
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Fri 2/276:30 pm
ORD
-
EDI
2 stops22h 30m
Multiple Airlines
Tue 3/37:50 am
EDI
-
ORD
2 stops15h 30m
Multiple Airlines
Deal found 1/27$514
This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:25 pm
ORD
-
GLA
1 stop12h 00m
Icelandair
Sat 5/92:20 pm
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 1/26$517

Find 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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$479
(CrystalTravel)

One-way from

$172
(Expedia)

Popular in

June

Cheapest in

April

Average price

$666

Good round-trip deal

$641 or less

Good one-way deal

$398 or less
Provider with most accurate pricing for Chicago (CHI)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-London (LON) flights.
Search Deals
From Chicago (CHI) to United Kingdom
Search Deals
One-way flight from Chicago (CHI) to United Kingdom
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($203 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to United Kingdom.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to United Kingdom.
Search Deals

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 January 28, 2026.
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

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Mon 3/9

7:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Tue 3/17

12:35 pm-6:20 pm

1 stop10h 45m

$520

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Tue 3/10

7:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Wed 3/18

12:35 pm-6:20 pm

1 stop10h 45m

$520

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Tue 3/10

7:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Tue 3/17

12:35 pm-6:20 pm

1 stop10h 45m

$520

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 2/25

6:30 pm-10:50 pm

2 stops22h 20m

London Stansted

Tue 3/3

6:30 am-5:20 pm

2 stops16h 50m

$522

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 2/25

6:30 pm-4:40 pm

2 stops16h 10m

London Stansted

Wed 3/4

6:00 am-5:20 pm

2 stops17h 20m

$523

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 2/25

6:30 pm-5:05 pm

2 stops16h 35m

London Luton

Tue 3/3

9:00 am-5:20 pm

2 stops14h 20m

$526

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Sun 5/3

10:25 pm-1:25 pm

1 stop9h 00m

Glasgow Intl

Thu 5/7

2:20 pm-6:15 pm

1 stop9h 55m

$535

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 4/13

7:25 pm-2:40 pm

1 stop13h 15m

London Gatwick

Sun 4/26

3:40 pm-9:25 pm

1 stop11h 45m

$535

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 4/21

7:25 pm-3:30 pm

2 stops14h 05m

London Luton

Tue 4/28

9:40 am-6:15 pm

2 stops14h 35m

$543

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/15

7:15 pm-6:30 pm

1 stop17h 15m

London Heathrow

Wed 4/29

7:05 am-4:10 pm

2 stops15h 05m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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, December is the cheapest month in which you can book a flight from Chicago to United Kingdom (average of $96). Flying from Chicago to United Kingdom in July is currently the most expensive (average of $604). 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 January 28, 2026.

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 January 28, 2026.

The most flights from CHI to GB0 are scheduled on a Monday (45 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).

How often are flights from Chicago to the United Kingdom delayed?

About 26% of weekly flights between Chicago and United Kingdom have experienced delays in the past year, with the average delay time being 169 minutes.

What is the most punctual flight time for Chicago to the United Kingdom flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning 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 the United Kingdom flights?

Over the last year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.

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 January 28, 2026.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and Icelandair 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.
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,209 reviews
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Aer Lingus
7.2
Good
1,442 reviews
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Icelandair
7.1
Good
603 reviews
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,099 reviews
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,704 reviews
United Airlines
7.4
Good
9,209 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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.

  • How long is the flight from Chicago to United Kingdom?

    For as low as $520, Icelandair can have you in United Kingdom from Chicago in 9h 25m. Airlines will cover a distance of 3663 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 JetBlue ($135), Icelandair ($183), and Scandinavian Airlines ($214).

  • 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 Aer Lingus (73%), American Airlines (66%) or Alaska 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 $2,596, our data shows the cheapest flight currently is $263. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $412 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, December is the cheapest month in which you can book a flight from Chicago to United Kingdom (average of $96). Flying from Chicago to United Kingdom in July is currently the most expensive (average of $604). 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
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Charles de Gaulle flights
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Midway to Heathrow flights
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Midway to Dublin flights
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O'Hare Intl to Bruxelles-National flights
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Midway to Madrid flights
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St. Louis to Heathrow flights
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Midway to Barcelona-El Prat flights
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Midway to Lisbon flights
Midway to Frederic Chopin flights
O'Hare Intl to Prague flights
Midway to Amsterdam flights
O'Hare Intl to Berlin flights
O'Hare Intl to Geneva 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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$724FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$573FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$331Average$632FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$989FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$427Average$577FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$471Average$675FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$480Average$987FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$499Average$836FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$516Average$769FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$522Average$809FlexibilityNo cancel feeOn-time75%

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