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$246+ Cheap flights from Illinois 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
feb. 13 — feb. 201
vie. 2/13
vie. 2/20
1 adult, Economy
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Cheap flight deals from Illinois to United Kingdom

Keep the following information in mind while searching for Illinois to United Kingdom flight deals. Data was last updated enero 14, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$472
(Mytrip)

One-way from

$246
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$666

Good round-trip deal

$687 or less

Good one-way deal

$447 or less
Provider with most accurate pricing for Chicago (CHI)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-London (LON) flights.
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From Illinois to United Kingdom
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One-way flight from Illinois to United Kingdom
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Highest demand for flights based on searches. 21% potential increase in price ($205 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Illinois to United Kingdom.
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Price to beat on a one-way flight from Illinois to United Kingdom.
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Find flight deals from Illinois to United Kingdom

Cheapest flights from Illinois to United Kingdom
Explore the most affordable flight options available from Illinois to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 14, 2026.

This Mytrip deal was found by Cheapflights users on 1/12. 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.
mié. 2/46:30 pm
ORD
-
GLA
2 stops20h 30m
Multiple Airlines
mar. 2/108:25 am
GLA
-
ORD
2 stops14h 55m
Multiple Airlines
Deal found 1/12$472
This Mytrip deal was found by Cheapflights users on 1/11. 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.
mié. 2/46:30 pm
ORD
-
GLA
2 stops20h 30m
Multiple Airlines
mié. 2/117:45 am
GLA
-
ORD
2 stops15h 35m
Multiple Airlines
Deal found 1/11$474
This CrystalTravel deal was found by Cheapflights users on 1/13. 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.
lun. 3/26:30 pm
ORD
-
EDI
1 stop9h 30m
Icelandair
mar. 3/1711:00 am
EDI
-
ORD
1 stop12h 20m
Icelandair
Deal found 1/13$485
This CrystalTravel deal was found by Cheapflights users on 1/12. 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.
mié. 3/117:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
mar. 3/1712:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/12$486
This Flightnetwork deal was found by Cheapflights users on 1/13. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/26:30 pm
ORD
-
EDI
1 stop9h 30m
Icelandair
mar. 2/1011:00 am
EDI
-
ORD
1 stop12h 20m
Icelandair
Deal found 1/13$491
This oojo deal was found by Cheapflights users on 1/12. 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.
mar. 2/36:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
sáb. 2/712:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/12$492
This Mytrip deal was found by Cheapflights users on 1/13. 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.
vie. 2/66:30 pm
ORD
-
EDI
2 stops20h 35m
Multiple Airlines
lun. 2/910:30 pm
EDI
-
ORD
2 stops24h 50m
Multiple Airlines
Deal found 1/13$493
This FlightHub deal was found by Cheapflights users on 1/12. 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.
jue. 2/56:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
mié. 2/1112:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/12$497
This Mytrip deal was found by Cheapflights users on 1/12. 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.
mar. 1/206:30 pm
ORD
-
GLA
2 stops19h 50m
Multiple Airlines
lun. 1/2611:35 pm
GLA
-
ORD
2 stops23h 45m
Multiple Airlines
Deal found 1/12$498
This CrystalTravel deal was found by Cheapflights users on 1/13. 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.
sáb. 4/47:25 pm
ORD
-
EDI
1 stop11h 55m
Icelandair
jue. 4/92:15 pm
EDI
-
ORD
1 stop10h 00m
Icelandair
Deal found 1/13$502
This Cheapflightsfares deal was found by Cheapflights users on 1/13. 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.
lun. 3/26:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
mar. 3/1712:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/13$503
This Cheapflightsfares deal was found by Cheapflights users on 1/12. 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.
lun. 3/26:30 pm
ORD
-
GLA
1 stop9h 25m
Icelandair
sáb. 3/712:35 pm
GLA
-
ORD
1 stop10h 45m
Icelandair
Deal found 1/12$504

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 enero 14, 2026.
Use the filters below to find and compare flights from Illinois to the United Kingdom that are best for you.

Fly from

Illinois

Fly to

United Kingdom

Route

Depart

Return

Price

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

vie. 2/6

6:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

jue. 2/12

11:15 am-5:20 pm

1 stop12h 05m

$519

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

dom. 5/3

10:25 pm-1:25 pm

1 stop9h 00m

Glasgow Intl

mié. 5/13

2:20 pm-6:15 pm

1 stop9h 55m

$534

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

mié. 3/4

3:50 pm-9:50 am

1 stop12h 00m

London Stansted

lun. 3/9

9:45 pm-3:55 pm

2 stops23h 10m

$535

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

jue. 1/29

7:10 pm-11:20 pm

2 stops22h 10m

London Stansted

dom. 2/1

6:30 am-4:55 pm

2 stops16h 25m

$536

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

mié. 2/4

9:00 pm-5:05 pm

1 stop14h 05m

London Luton

mié. 2/18

6:50 am-7:15 pm

1 stop18h 25m

$537

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

sáb. 2/7

7:20 pm-8:15 pm

2 stops18h 55m

London Luton

sáb. 2/14

6:00 am-4:45 pm

2 stops16h 45m

$547

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

lun. 1/19

12:50 pm-2:05 pm

2 stops19h 15m

London Stansted

mar. 1/27

8:10 am-8:10 pm

2 stops18h 00m

$548

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

mié. 2/4

5:10 pm-10:45 am

1 stop11h 35m

Glasgow Intl

vie. 2/13

8:15 am-6:45 pm

1 stop16h 30m

$560

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 2/3

5:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

mar. 2/10

9:50 am-7:15 pm

1 stop15h 25m

$564

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 2/11

5:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

mié. 2/18

7:50 am-7:15 pm

1 stop17h 25m

$564

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

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

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Illinois 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 Illinois to the United Kingdom

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

Currently, December is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $96). Flying from Illinois to United Kingdom in July is currently the most expensive (average of $603). 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 IL to GB?

Find hourly flight availability from Illinois 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 enero 14, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to United Kingdom as you normally would.

Weekly flight availability from Illinois to United Kingdom

Explore weekly flight availability from Illinois 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 enero 14, 2026.

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

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois to United Kingdom?

    A quick flight from Illinois to United Kingdom can take about 9h 25m. Icelandair provides one of the quickest options available for as low as $519. The distance from Illinois to United Kingdom is about 3663 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to United Kingdom one-way?

    One-way options have recently been found by users for as low as $135 on JetBlue. Other airlines that offer cheap prices include Scandinavian Airlines from $174 and Icelandair from $188 one-way.

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

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

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

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

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

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

    Currently, December is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $96). Flying from Illinois to United Kingdom in July is currently the most expensive (average of $603). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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O'Hare Intl to Leonardo da Vinci/Fiumicino flights
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John F Kennedy Intl to Athens flights
LaGuardia to Charles de Gaulle flights
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Newark to Malpensa flights
San Francisco to Heathrow flights
Newark to Lisbon flights
John F Kennedy Intl to Stansted flights
O'Hare Intl to Charles de Gaulle flights
Baltimore to Heathrow flights
John F Kennedy Intl to Gatwick flights
LaGuardia to Leonardo da Vinci/Fiumicino flights
Boston to Leonardo da Vinci/Fiumicino flights
Los Angeles to Charles de Gaulle flights
Newark to Madrid flights
Boston to Dublin flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Amsterdam flights
John F Kennedy Intl to Madrid flights
John F Kennedy Intl to Malpensa flights
Seattle to Heathrow flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
San Francisco to Charles de Gaulle flights
Boston to Gatwick flights

Top 10 airlines flying from Illinois to United Kingdom

Discover the top 10 airlines that operate flights from Illinois 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 enero 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$724FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$562FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$331Average$630FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$1,003FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$428Average$586FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$437Average$669FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$480Average$987FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$496Average$836FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$516Average$767FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$522Average$809FlexibilityNo cancel feeOn-time75%

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