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$247+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$655
(Booking.com)

One-way from

$247
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,034

Good round-trip deal

$670 or less

Good one-way deal

$487 or less
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 ($207 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 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 July 2, 2025.

This Booking.com deal was found by Cheapflights users on 7/1. 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.
Sun 8/173:45 pmORD - LHR
1 stop11h 20mAer Lingus
Tue 8/198:50 amLHR - ORD
1 stop11h 10mAer Lingus
Deal found 7/1$655
This oojo deal was found by Cheapflights users on 7/1. 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.
Thu 9/116:00 pmORD - LGW
2 stops20h 25mTAP AIR PORTUGAL
Wed 10/84:25 pmLGW - ORD
1 stop26h 10mTAP AIR PORTUGAL
Deal found 7/1$655
This Cheapflightsfares deal was found by Cheapflights users on 7/2. 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.
Tue 8/58:15 pmORD - LHR
Nonstop8h 05mBritish Airways
Wed 8/133:30 pmLHR - ORD
Nonstop8h 45mBritish Airways
Deal found 7/2$656
This Mytrip deal was found by Cheapflights users on 7/1. 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 8/158:47 pmORD - LGW
2 stops32h 08mMultiple Airlines
Fri 8/2210:55 amLGW - ORD
1 stop24h 45mMultiple Airlines
Deal found 7/1$656
This Scandinavian Airlines deal was found by Cheapflights users on 7/2. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/257:00 amORD - LHR
2 stops20h 20mScandinavian Airlines
Tue 12/27:30 pmLHR - ORD
1 stop27h 15mScandinavian Airlines
Deal found 7/2$657
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Thu 8/149:15 pmORD - STN
1 stop12h 30mMultiple Airlines
Fri 8/2211:15 amSTN - ORD
1 stop13h 45mMultiple Airlines
Deal found 7/2$657
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 9/154:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
Fri 10/318:55 amLHR - ORD
1 stop13h 20mUnited Airlines
Deal found 7/1$658
This Virgin Atlantic deal was found by Cheapflights users on 7/1. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:00 pmMDW - LHR
2 stops11h 55mVirgin Atlantic
Tue 11/1811:30 amLHR - MDW
2 stops16h 14mVirgin Atlantic
Deal found 7/1$658
This Mytrip deal was found by Cheapflights users on 7/2. 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 9/117:25 pmORD - LTN
2 stops16h 10mMultiple Airlines
Fri 9/196:05 amLTN - ORD
2 stops18h 10mMultiple Airlines
Deal found 7/2$659
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Wed 7/307:25 pmORD - LHR
1 stop10h 30mIcelandair
Thu 8/141:05 pmLHR - ORD
1 stop11h 10mIcelandair
Deal found 7/1$660
This Delta deal was found by Cheapflights users on 6/30. 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 8/1010:30 amMDW - LHR
1 stop14h 45mDelta
Tue 8/199:20 amLHR - MDW
1 stop14h 27mDelta
Deal found 6/30$661
This Iberia deal was found by Cheapflights users on 6/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:59 pmORD - LHR
1 stop25h 41mIberia
Fri 10/179:15 amLHR - ORD
Nonstop8h 35mIberia
Deal found 6/30$662

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 July 2, 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 - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/17

3:45 pm-9:05 am

1 stop11h 20m

London Heathrow

Tue 8/19

8:50 am-2:00 pm

1 stop11h 10m

$655

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 9/11

6:00 pm-8:25 pm

2 stops20h 25m

London Gatwick

Wed 10/8

4:25 pm-12:35 pm

1 stop26h 10m

$655

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/5

8:15 pm-10:20 am

Nonstop8h 05m

London Heathrow

Wed 8/13

3:30 pm-6:15 pm

Nonstop8h 45m

$656

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 8/15

8:47 pm-10:55 am

2 stops32h 08m

London Gatwick

Fri 8/22

10:55 am-5:40 am

1 stop24h 45m

$656

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Thu 8/14

9:15 pm-3:45 pm

1 stop12h 30m

London Stansted

Fri 8/22

11:15 am-7:00 pm

1 stop13h 45m

$657

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/15

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Fri 10/31

8:55 am-5:15 pm

1 stop13h 20m

$658

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 8/26

10:31 am-6:45 am

2 stops14h 14m

London Heathrow

Tue 9/2

6:15 am-9:26 pm

2 stops21h 11m

$658

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 9/11

7:25 pm-5:35 pm

2 stops16h 10m

London Luton

Fri 9/19

6:05 am-6:15 pm

2 stops18h 10m

$659

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 7/30

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Thu 8/14

1:05 pm-6:15 pm

1 stop11h 10m

$660

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 8/10

10:30 am-7:15 am

1 stop14h 45m

London Heathrow

Tue 8/19

9:20 am-5:47 pm

1 stop14h 27m

$661

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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, November is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $661). Flying from Illinois to United Kingdom in June is currently the most expensive (average of $1,098). 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 July 2, 2025.

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 July 2, 2025.

The most flights from USIL to GB0 are scheduled on a Monday (51 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 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 2, 2025.
Read reviews from past customers who have flown Delta, KLM, and Austrian Airlines from Illinois to the United Kingdom. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
1,366 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
809 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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!
Finnair
7.6
Good
1,301 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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
1,472 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

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 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.

  • 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 $267 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $352 and JetBlue from $353 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, November is the cheapest month in which you can book a flight from Illinois to United Kingdom (average of $661). Flying from Illinois to United Kingdom in June is currently the most expensive (average of $1,098). 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 Illinois to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$257Average$671FlexibilityNo cancel feeOn-time79%
DeltaCheapest$345Average$975FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$381Average$600FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$430Average$914FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$465Average$651FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$507Average$792FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$516Average$872FlexibilityNo cancel feeOn-time62%
Aer LingusCheapest$539Average$784FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$569Average$743FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$576Average$853FlexibilityNo cancel feeOn-time71%

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