HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
United Kingdom

$167+ 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to United Kingdom with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 6, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$497
(Mytrip)

One-way from

$167
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$692

Good round-trip deal

$713 or less

Good one-way deal

$439 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 Illinois to United Kingdom
Search Deals
One-way flight from Illinois to United Kingdom
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($201 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Illinois to United Kingdom.
Search Deals
Price to beat on a one-way flight from Illinois to United Kingdom.
Search Deals

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 November 6, 2025.

This Mytrip deal was found by Cheapflights users on 11/4. 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.
Tue 12/26:30 pmORD - EDI
2 stops17h 55mMultiple Airlines
Tue 12/98:40 amEDI - ORD
2 stops14h 40mMultiple Airlines
Deal found 11/4$497
This Mytrip deal was found by Cheapflights users on 11/5. 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.
Tue 12/26:30 pmORD - EDI
2 stops17h 55mMultiple Airlines
Wed 12/108:20 amEDI - ORD
2 stops15h 00mMultiple Airlines
Deal found 11/5$504
This Mytrip deal was found by Cheapflights users on 11/5. 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 12/76:30 pmORD - EDI
2 stops21h 35mMultiple Airlines
Sun 12/148:00 amEDI - ORD
2 stops15h 20mMultiple Airlines
Deal found 11/5$506
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Wed 12/37:40 pmORD - EDI
1 stop15h 35mMultiple Airlines
Wed 12/107:25 amEDI - ORD
1 stop12h 35mMultiple Airlines
Deal found 11/4$507
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Thu 12/46:30 pmORD - EDI
2 stops22h 00mMultiple Airlines
Thu 12/117:45 amEDI - ORD
2 stops15h 35mMultiple Airlines
Deal found 11/4$523
This Trip.com deal was found by Cheapflights users on 11/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:40 pmORD - EDI
1 stop18h 10mAer Lingus
Wed 12/109:35 amEDI - ORD
1 stop14h 20mAer Lingus
Deal found 11/6$535
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 11/97:40 pmORD - LTN
1 stop10h 05mMultiple Airlines
Tue 11/189:00 amLTN - ORD
1 stop14h 55mMultiple Airlines
Deal found 11/5$543
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Wed 12/36:30 pmORD - STN
2 stops17h 20mMultiple Airlines
Wed 12/106:30 amSTN - ORD
2 stops16h 50mMultiple Airlines
Deal found 11/3$543
This oojo deal was found by Cheapflights users on 11/5. 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 11/126:30 pmORD - LHR
1 stop19h 00mIcelandair
Sun 11/2312:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 11/5$544
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 11/176:40 amORD - LGW
1 stop17h 20mMultiple Airlines
Fri 11/219:45 pmLGW - ORD
2 stops47h 00mMultiple Airlines
Deal found 11/5$544
This Mytrip deal was found by Cheapflights users on 11/6. 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 11/107:40 pmORD - EDI
1 stop18h 35mMultiple Airlines
Wed 11/127:25 amEDI - ORD
1 stop12h 35mMultiple Airlines
Deal found 11/6$544
This oojo deal was found by Cheapflights users on 11/6. 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.
Tue 11/116:30 pmORD - LHR
1 stop19h 00mIcelandair
Thu 11/208:35 pmLHR - ORD
1 stop26h 45mIcelandair
Deal found 11/6$545

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 November 6, 2025.
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

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 12/8

7:20 pm-9:20 pm

2 stops20h 00m

London Stansted

Thu 12/11

4:30 pm-4:45 pm

2 stops30h 15m

$547

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 11/19

7:40 pm-5:05 pm

1 stop15h 25m

London Luton

Mon 11/24

6:00 am-2:00 pm

1 stop14h 00m

$548

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 11/19

7:40 pm-3:05 pm

1 stop13h 25m

London Stansted

Mon 11/24

6:30 am-2:00 pm

1 stop13h 30m

$548

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Tue 12/2

7:40 pm-6:25 pm

1 stop16h 45m

Edinburgh Turnhouse

Tue 12/9

8:40 am-5:55 pm

1 stop15h 15m

$552

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Fri 2/13

6:30 pm-8:35 pm

2 stops20h 05m

London Stansted

Mon 2/16

9:20 pm-5:20 pm

2 stops26h 00m

$554

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 11/9

5:23 am-6:25 am

1 stop19h 02m

London Heathrow

Wed 11/19

6:20 am-3:10 pm

1 stop14h 50m

$579

ChicagoEdinburgh

ORD - EDI

ORDEDI

Chicago O'Hare Intl

Wed 12/3

3:50 pm-7:50 am

1 stop10h 00m

Edinburgh Turnhouse

Wed 12/10

8:20 am-2:00 pm

1 stop11h 40m

$580

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 11/25

1:47 pm-7:05 am

1 stop11h 18m

London Heathrow

Tue 12/2

3:50 pm-11:47 pm

1 stop13h 57m

$585

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 11/24

1:47 pm-7:05 am

1 stop11h 18m

London Heathrow

Tue 12/2

8:55 am-4:18 pm

1 stop13h 23m

$585

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 11/9

5:34 pm-11:40 am

1 stop12h 06m

London Heathrow

Tue 11/18

11:05 am-6:18 pm

1 stop13h 13m

$586

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 results
1
2
3
...
6

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, May is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $399). 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 November 6, 2025.

One of the essential ways to save on airfare from Illinois to United Kingdom is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 31% on airfare.

What is the cheapest day to fly from Illinois to United Kingdom?

Use this chart to determine the cheapest time to fly round-trip from Illinois to United Kingdom. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to United Kingdom flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 6, 2025.

The most flights from USIL to GB0 are scheduled on a Wednesday (45 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (39 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 10h. Delta provides one of the quickest options available for as low as $580. The distance from Illinois to United Kingdom is about 3699 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 $266 on JetBlue. Other airlines that offer cheap prices include Lufthansa from $403 and Virgin Atlantic from $406 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, May is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $399). 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.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Istanbul flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Gatwick flights
Newark to Orly flights
Boston to Heathrow flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Leonardo da Vinci/Fiumicino flights
Miami to Madrid flights
Newark to Gatwick flights
John F Kennedy Intl to Orly flights
Dulles Intl to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Gatwick flights
Los Angeles to Charles de Gaulle flights
LaGuardia to Charles de Gaulle flights
John F Kennedy Intl to Stansted flights
Newark to Madrid flights
John F Kennedy Intl to Madrid flights
John F Kennedy Intl to Malpensa flights
San Francisco to Heathrow flights
John F Kennedy Intl to Barcelona-El Prat flights
O'Hare Intl to Heathrow flights
Boston to Charles de Gaulle flights
Dallas/Fort Worth to Heathrow flights
Newark to Malpensa flights
John F Kennedy Intl to Luton flights
Newark to London City flights
John F Kennedy Intl to Lisbon flights
Newark to Barcelona-El Prat flights
O'Hare Intl to Charles de Gaulle flights
Baltimore to Heathrow flights
Newark to Dublin flights
Dulles Intl to Charles de Gaulle flights
Newark to Frankfurt flights
John F Kennedy Intl to Dublin flights
San Francisco to Charles de Gaulle flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Madrid flights
Seattle to Heathrow flights
John F Kennedy Intl to Amsterdam flights
Newark to Lisbon flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
Newark to Amsterdam flights
John F Kennedy Intl to Frankfurt flights
Newark to Stansted 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$791FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$594FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$338Average$621FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$1,028FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$437Average$669FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$450Average$644FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$460Average$941FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$487Average$677FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$502Average$852FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$515Average$837FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.