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$223+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
feb. 4 — feb. 111
mar. 2/4
mar. 2/11
1 adult, Economy
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Cheap flight deals from Illinois to United Kingdom

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to United Kingdom (GB0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$533
(oojo)

One-way from

$223
(oojo)

Popular in

June

Cheapest in

February

Average price

$671

Good round-trip deal

$674 or less

Good one-way deal

$441 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. 19% potential increase in price ($178 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in January 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 enero 30, 2025.

This oojo deal was found by Cheapflights users on 1/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 3/97:30 pmORD - MAN
1 stop10h 15mIcelandair
mié. 3/1911:55 amMAN - ORD
1 stop11h 25mIcelandair
Deal found 1/30$533
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/227:15 pmORD - MAN
1 stop17h 15mScandinavian Airlines
lun. 10/201:05 pmMAN - ORD
2 stops33h 05mScandinavian Airlines
Deal found 1/29$560
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 2/98:25 pmORD - MAN
1 stop13h 45mTAP AIR PORTUGAL
mar. 2/185:15 pmMAN - ORD
1 stop28h 15mTAP AIR PORTUGAL
Deal found 1/29$569
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
vie. 3/288:40 pmORD - MAN
1 stop11h 45mMultiple Airlines
lun. 4/78:35 amMAN - ORD
1 stop11h 25mMultiple Airlines
Deal found 1/28$578
This oojo deal was found by Cheapflights users on 1/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/37:40 pmORD - LHR
1 stop14h 20mScandinavian Airlines
jue. 2/137:05 amLHR - ORD
2 stops16h 45mScandinavian Airlines
Deal found 1/30$587
This FlightHub deal was found by Cheapflights users on 1/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/2310:15 pmORD - LHR
1 stop16h 05mIcelandair
mié. 4/309:25 pmLHR - ORD
1 stop26h 55mIcelandair
Deal found 1/30$588
This Kiwi.com deal was found by Cheapflights users on 1/30. 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.
mié. 2/127:07 amORD - LGW
1 stop16h 53mMultiple Airlines
lun. 2/2412:00 pmLGW - ORD
2 stops34h 31mMultiple Airlines
Deal found 1/30$588
This Mytrip deal was found by Cheapflights users on 1/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/411:35 amORD - LTN
3 stops16h 10mMultiple Airlines
sáb. 2/88:35 pmLTN - ORD
2 stops24h 16mMultiple Airlines
Deal found 1/29$589
This oojo deal was found by Cheapflights users on 1/28. 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. 3/46:30 pmORD - LGW
1 stop10h 25mIcelandair
lun. 3/1011:55 amLGW - ORD
1 stop11h 25mIcelandair
Deal found 1/28$590
This Mytrip deal was found by Cheapflights users on 1/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/166:00 pmORD - STN
2 stops22h 30mMultiple Airlines
jue. 4/2410:55 pmSTN - ORD
2 stops23h 05mMultiple Airlines
Deal found 1/29$591
This Cheapflightsfares deal was found by Cheapflights users on 1/28. 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.
jue. 4/177:10 pmORD - MAN
1 stop10h 25mBritish Airways
dom. 4/2010:35 amMAN - ORD
1 stop11h 20mBritish Airways
Deal found 1/28$592
This eDestinos deal was found by Cheapflights users on 1/29. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:00 pmORD - LHR
1 stop22h 05mTAP AIR PORTUGAL
mar. 10/77:50 pmLHR - ORD
1 stop26h 20mTAP AIR PORTUGAL
Deal found 1/29$594

Find flights from Illinois to United Kingdom within your budget

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 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoManchester

ORD - MAN

ORDMAN

Chicago O'Hare Intl

dom. 3/9

7:30 pm-10:45 am

1 stop10h 15m

Manchester

mié. 3/19

11:55 am-6:20 pm

1 stop11h 25m

$533

ChicagoManchester

ORD - MAN

ORDMAN

Chicago O'Hare Intl

dom. 2/9

8:25 pm-4:10 pm

1 stop13h 45m

Manchester

mar. 2/18

5:15 pm-3:30 pm

1 stop28h 15m

$570

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 3/2

7:40 pm-9:35 pm

2 stops19h 55m

London Heathrow

mié. 3/12

7:50 pm-6:50 pm

2 stops28h 00m

$586

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

mié. 2/12

7:07 am-6:00 am

1 stop16h 53m

London Gatwick

lun. 2/24

12:00 pm-4:31 pm

2 stops34h 31m

$588

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

mar. 2/4

11:35 am-9:45 am

3 stops16h 10m

London Luton

sáb. 2/8

8:35 pm-2:51 pm

2 stops24h 16m

$589

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

sáb. 2/15

2:55 pm-9:20 am

1 stop12h 25m

London Heathrow

dom. 2/23

11:00 am-1:55 pm

Nonstop8h 55m

$590

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

mar. 3/4

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

jue. 3/13

11:55 am-6:20 pm

1 stop11h 25m

$590

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mar. 4/8

8:30 pm-10:30 am

Nonstop8h 00m

London Heathrow

dom. 5/18

9:30 am-5:50 pm

1 stop14h 20m

$601

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

dom. 3/9

9:25 pm-3:45 pm

1 stop13h 20m

London Gatwick

mar. 3/11

4:35 pm-4:30 pm

1 stop28h 55m

$601

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

jue. 2/27

7:05 pm-5:50 pm

1 stop16h 45m

London Gatwick

jue. 3/6

6:40 pm-4:15 pm

1 stop27h 35m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

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.

Travel insights for flights from Illinois to United Kingdom

Get recent, data-driven insights about flights from Illinois to United Kingdom including ideal travel times, pricing trends, and more.

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 $1,138). 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 30, 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 enero 30, 2025.

The most flights from USIL to GB0 are scheduled on a Thursday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 enero 30, 2025.
Get a feel of what it's like to fly with Delta, KLM and LOT from Illinois to United Kingdom by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,454 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,335 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

LOT
7.6
Good
1,097 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.5
Good
786 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $223 on Icelandair. Other airlines that offer cheap prices include WestJet from $256 and JetBlue from $269 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 $1,138). 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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Stewart to Stansted flights
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Los Angeles to Charles de Gaulle flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
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San Francisco to Charles de Gaulle 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$381Average$720FlexibilityNo cancel feeOn-time77%
DeltaCheapest$451Average$938FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$464Average$653FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$507Average$835FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$543Average$817FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$544Average$946FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$554Average$907FlexibilityNo cancel feeOn-time67%
FinnairCheapest$565Average$759FlexibilityNo cancel feeOn-time76%
KLMCheapest$571Average$832FlexibilityNo cancel feeOn-time75%
SWISSCheapest$581Average$836FlexibilityNo cancel feeOn-time79%
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