How long is the flight from Illinois to United Kingdom?

A quick flight from Illinois to United Kingdom can take about 8h 20m. Icelandair provides one of the quickest options available for as low as $507. The distance from Illinois to United Kingdom is about 3939 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 $324 on JetBlue. Other airlines that offer cheap prices include Scandinavian Airlines from $346 and Icelandair from $368 one-way.

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.

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).

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.

$227+ Flights from Illinois to the United Kingdom

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Cheap flight deals from Illinois to United Kingdom

Round-trip from	$491 (oojo)
One-way from	$227 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$659
Good round-trip deal	$642 or less
Good one-way deal	$438 or less

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 ($208 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).

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Average for round-trip flights in September 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 September 17, 2025.

Fri 10/317:30 pmORD - GLA

1 stop9h 25mIcelandair

Sat 11/1512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/17

$477

Sun 10/1210:15 pmORD - GLA

1 stop9h 10mIcelandair

Thu 10/3012:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/14

$491

Mon 10/67:25 pmORD - GLA

1 stop12h 00mIcelandair

Fri 10/172:20 pmGLA - ORD

1 stop12h 55mIcelandair

Deal found 9/16

$493

Thu 11/66:30 pmORD - GLA

1 stop9h 25mIcelandair

Thu 11/1312:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/15

$494

Thu 10/307:30 pmORD - GLA

1 stop9h 25mIcelandair

Sat 11/1512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/17

$495

Sun 10/127:25 pmORD - GLA

1 stop12h 00mIcelandair

Sun 11/212:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/14

$496

Wed 11/512:50 pmORD - LHR

1 stop12h 20mAir Canada

Tue 11/119:00 amLHR - ORD

2 stops15h 39mAir Canada

Deal found 9/15

$505

Mon 12/16:30 pmORD - STN

2 stops13h 50mMultiple Airlines

Sun 12/146:30 amSTN - ORD

2 stops16h 50mMultiple Airlines

Deal found 9/15

$505

Mon 12/112:50 pmORD - LHR

1 stop12h 20mMultiple Airlines

Tue 12/99:00 amLHR - ORD

2 stops15h 52mMultiple Airlines

Deal found 9/16

$506

Wed 11/56:30 pmORD - LGW

2 stops16h 50mMultiple Airlines

Wed 11/128:50 amLGW - ORD

2 stops14h 30mMultiple Airlines

Deal found 9/15

$506

Tue 9/304:00 pmORD - LHR

Nonstop8h 20mUnited Airlines

Tue 10/76:50 amLHR - ORD

1 stop11h 15mUnited Airlines

Deal found 9/15

$507

Mon 10/67:51 pmORD - LGW

1 stop32h 09mMultiple Airlines

Thu 10/92:00 pmLGW - ORD

1 stop34h 46mMultiple Airlines

Deal found 9/15

$507

Best flights from Illinois to United Kingdom
Discover carefully curated flight deals from Illinois to United Kingdom that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2025.

Sun 11/306:30 pmORD - GLA

1 stop9h 25mIcelandair

Fri 12/512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/17

$493

Sun 9/284:00 pmORD - LHR

Nonstop8h 20mUnited Airlines

Tue 10/216:50 amLHR - ORD

1 stop11h 15mUnited Airlines

Deal found 9/15

$507

Fri 12/56:30 pmORD - STN

2 stops20h 05mMultiple Airlines

Sat 12/139:00 pmSTN - ORD

2 stops26h 20mMultiple Airlines

Deal found 9/17

$508

Tue 9/301:00 pmORD - LHR

1 stop11h 25mDelta

Wed 10/159:00 amLHR - ORD

1 stop12h 00mDelta

Deal found 9/15

$514

Tue 9/302:05 pmORD - LHR

1 stop10h 40mKLM

Fri 10/178:40 amLHR - ORD

1 stop11h 30mKLM

Deal found 9/16

$516

Wed 1/214:05 pmSTL - LHR

1 stop10h 25mAir Canada

Thu 1/296:00 pmLHR - STL

1 stop27h 29mAir Canada

Deal found 9/16

$531

Tue 10/217:10 pmMDW - LHR

1 stop12h 00mVirgin Atlantic

Tue 10/288:55 amLHR - MDW

1 stop18h 19mVirgin Atlantic

Deal found 9/16

$532

Mon 11/175:10 pmORD - GLA

1 stop10h 40mBritish Airways

Mon 11/248:25 pmGLA - ORD

1 stop23h 25mBritish Airways

Deal found 9/15

$565

Tue 9/301:35 pmORD - EDI

1 stop13h 40mJetBlue

Wed 10/1512:10 pmEDI - ORD

1 stop12h 08mJetBlue

Deal found 9/15

$866

Mon 12/15:50 pmORD - LHR

Nonstop8h 05mUnited Airlines

Tue 12/96:50 amLHR - ORD

1 stop11h 20mUnited Airlines

Deal found 9/16

$507

Mon 11/34:56 pmORD - LHR

1 stop9h 49mMultiple Airlines

Thu 11/208:55 amLHR - ORD

1 stop12h 15mMultiple Airlines

Deal found 9/17

$512

Tue 9/301:00 pmORD - LHR

1 stop11h 25mDelta

Tue 10/76:30 amLHR - ORD

1 stop13h 40mDelta

Deal found 9/17

$516

Sun 11/166:30 pmORD - GLA

1 stop9h 25mIcelandair

Tue 11/2512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/15

$517

Tue 11/114:05 pmSTL - LHR

2 stops33h 05mAir Canada

Tue 11/181:25 pmLHR - STL

2 stops32h 04mAir Canada

Deal found 9/16

$531

Mon 11/101:47 pmMDW - LHR

1 stop11h 18mKLM

Wed 11/1911:05 amLHR - MDW

1 stop13h 13mKLM

Deal found 9/14

$532

Sun 9/286:30 pmMDW - LHR

1 stop13h 00mVirgin Atlantic

Tue 10/711:45 amLHR - MDW

1 stop12h 40mVirgin Atlantic

Deal found 9/16

$532

Sun 11/29:30 pmORD - LHR

1 stop30h 10mUnited Airlines

Thu 11/201:25 pmLHR - ORD

1 stop27h 53mUnited Airlines

Deal found 9/17

$511

Wed 12/36:30 pmORD - STN

2 stops17h 20mMultiple Airlines

Sun 12/76:30 amSTN - ORD

2 stops16h 50mMultiple Airlines

Deal found 9/16

$514

Sun 9/288:10 pmORD - LHR

1 stop11h 00mDelta

Thu 10/168:40 amLHR - ORD

1 stop11h 30mDelta

Deal found 9/16

$516

Sun 11/166:30 pmORD - GLA

1 stop9h 25mIcelandair

Thu 11/2712:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/15

$517

Tue 10/2810:45 pmORD - GLA

1 stop13h 10mBritish Airways

Wed 11/59:45 amGLA - ORD

2 stops28h 33mBritish Airways

Deal found 9/17

$584

Mon 10/276:23 pmMDW - LHR

1 stop9h 22mKLM

Tue 11/1111:05 amLHR - MDW

1 stop13h 13mKLM

Deal found 9/15

$532

Wed 12/36:30 pmORD - LTN

2 stops22h 35mMultiple Airlines

Sun 12/78:05 amLTN - ORD

2 stops15h 15mMultiple Airlines

Deal found 9/16

$515

Tue 10/216:00 pmORD - LHR

Nonstop8h 20mUnited Airlines

Wed 10/291:35 pmLHR - ORD

Nonstop9h 25mUnited Airlines

Deal found 9/15

$517

Sun 11/166:30 pmORD - GLA

1 stop9h 25mIcelandair

Wed 11/2612:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/15

$517

Wed 11/1210:35 amORD - LCY

2 stops14h 40mVirgin Atlantic

Wed 11/197:45 amLCY - ORD

1 stop12h 35mVirgin Atlantic

Deal found 9/17

$573

Mon 12/11:47 pmMDW - LHR

1 stop11h 18mDelta

Tue 12/98:40 amLHR - MDW

2 stops15h 20mDelta

Deal found 9/15

$525

Sun 3/12:00 pmMDW - LHR

1 stop11h 05mKLM

Wed 3/1811:05 amLHR - MDW

1 stop12h 03mKLM

Deal found 9/16

$540

Wed 10/296:10 pmORD - GLA

1 stop22h 15mBritish Airways

Wed 11/510:55 amGLA - ORD

2 stops27h 23mBritish Airways

Deal found 9/16

$595

Tue 10/142:00 pmORD - STN

2 stops16h 00mMultiple Airlines

Tue 10/219:45 pmSTN - ORD

2 stops28h 32mMultiple Airlines

Deal found 9/15

$515

Last-minute flights from Illinois to United Kingdom
Discover last-minute flight deals from Illinois to United Kingdom. Data last updated September 17, 2025 and is based on user searches.

Tue 9/304:00 pmORD - LHR

Nonstop8h 20mUnited Airlines

Tue 10/76:50 amLHR - ORD

1 stop11h 15mUnited Airlines

Deal found 9/15

$507

Mon 10/67:25 pmORD - GLA

1 stop12h 00mIcelandair

Fri 10/172:20 pmGLA - ORD

1 stop12h 55mIcelandair

Deal found 9/16

$493

Mon 10/67:51 pmORD - LGW

1 stop32h 09mMultiple Airlines

Thu 10/92:00 pmLGW - ORD

1 stop34h 46mMultiple Airlines

Deal found 9/15

$507

Fri 10/109:12 pmORD - LHR

2 stops17h 48mMultiple Airlines

Sun 10/126:00 amLHR - ORD

1 stop13h 20mMultiple Airlines

Deal found 9/15

$506

Sun 10/1210:15 pmORD - GLA

1 stop9h 10mIcelandair

Thu 10/3012:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/14

$491

Sun 10/127:25 pmORD - GLA

1 stop12h 00mIcelandair

Sun 11/212:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/14

$496

Sun 10/193:35 pmORD - LHR

1 stop12h 00mAir Canada

Tue 11/49:00 amLHR - ORD

2 stops15h 39mAir Canada

Deal found 9/15

$505

Wed 10/2210:40 amORD - STN

2 stops21h 10mMultiple Airlines

Tue 10/289:20 pmSTN - ORD

2 stops25h 00mMultiple Airlines

Deal found 9/15

$507

Mon 10/277:30 pmORD - GLA

1 stop9h 25mIcelandair

Sat 11/2212:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/16

$507

Tue 10/287:30 pmORD - GLA

1 stop9h 25mIcelandair

Wed 11/512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/15

$494

Thu 10/307:30 pmORD - GLA

1 stop9h 25mIcelandair

Fri 11/1412:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/17

$495

Fri 10/317:30 pmORD - GLA

1 stop9h 25mIcelandair

Sat 11/1512:35 pmGLA - ORD

1 stop10h 45mIcelandair

Deal found 9/17

$477

One-way flights from Illinois to United Kingdom
Search for one-way flight options from Illinois to United Kingdom. Find affordable one-way fares based on user searches. Data last updated September 17, 2025.

Thu 10/95:30 pmORD - EDI

1 stop34h 35mWestJet

Deal found 9/15

$227

Sat 10/255:30 pmORD - LHR

1 stop14h 20mWestJet

Deal found 9/15

$230

Sun 10/199:54 pmORD - LGW

2 stops50h 26mMultiple Airlines

Deal found 9/15

$233

Wed 11/57:10 pmORD - LGW

2 stops22h 25mMultiple Airlines

Deal found 9/15

$234

Thu 11/206:20 amMDW - LGW

2 stops32h 20mMultiple Airlines

Deal found 9/14

$236

Sat 9/275:40 pmORD - LGW

2 stops30h 40mMultiple Airlines

Deal found 9/15

$236

Wed 11/57:10 pmORD - LTN

2 stops21h 10mMultiple Airlines

Deal found 9/15

$237

Thu 10/236:00 pmORD - LGW

1 stop33h 45mTAP AIR PORTUGAL

Deal found 9/15

$237

Fri 10/246:00 pmORD - STN

2 stops23h 10mMultiple Airlines

Deal found 9/15

$237

Sun 10/1910:27 amORD - LHR

2 stops30h 28mMultiple Airlines

Deal found 9/16

$238

Mon 10/2010:27 amORD - LHR

2 stops17h 53mMultiple Airlines

Deal found 9/15

$239

Thu 9/254:56 pmMDW - LHR

3 stops41h 44mMultiple Airlines

Deal found 9/16

$239

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Sun 11/30

6:30 pm-9:55 am

1 stop9h 25m

Glasgow Intl

Fri 12/5

12:35 pm-5:20 pm

1 stop10h 45m

$493

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Tue 10/21

6:50 am-12:05 pm

1 stop11h 15m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/1

5:50 pm-7:55 am

Nonstop8h 05m

London Heathrow

Tue 12/9

6:50 am-12:10 pm

1 stop11h 20m

$507

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Fri 12/5

6:30 pm-8:35 pm

2 stops20h 05m

London Stansted

Sat 12/13

9:00 pm-5:20 pm

2 stops26h 20m

$508

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 11/2

9:30 pm-9:40 am

1 stop30h 10m

London Heathrow

Thu 11/20

1:25 pm-11:18 am

1 stop27h 53m

$511

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 11/3

4:56 pm-8:45 am

1 stop9h 49m

London Heathrow

Thu 11/20

8:55 am-3:10 pm

1 stop12h 15m

$512

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 9/30

1:00 pm-6:25 am

1 stop11h 25m

London Heathrow

Wed 10/15

9:00 am-3:00 pm

1 stop12h 00m

$514

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 12/3

6:30 pm-5:50 pm

2 stops17h 20m

London Stansted

Sun 12/7

6:30 am-5:20 pm

2 stops16h 50m

$514

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 12/3

6:30 pm-11:05 pm

2 stops22h 35m

London Luton

Sun 12/7

8:05 am-5:20 pm

2 stops15h 15m

$515

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Tue 10/14

2:00 pm-12:00 pm

2 stops16h 00m

London Stansted

Tue 10/21

9:45 pm-8:17 pm

2 stops28h 32m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results

...

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 $1,097). 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?

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

The most flights from USIL to GB0 are scheduled on a Tuesday (57 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (46 on average).

Related info for your journey

How long is the flight from Illinois to United Kingdom?
A quick flight from Illinois to United Kingdom can take about 8h 20m. Icelandair provides one of the quickest options available for as low as $507. The distance from Illinois to United Kingdom is about 3939 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 $324 on JetBlue. Other airlines that offer cheap prices include Scandinavian Airlines from $346 and Icelandair from $368 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 $1,097). 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

Top 10 airlines flying from Illinois to United Kingdom

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$51	Average$787	FlexibilityNo cancel fee	On-time62%
SWISS	Cheapest$257	Average$626	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$338	Average$606	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$345	Average$1,013	FlexibilityNo cancel fee	On-timeN/A
Lufthansa	Cheapest$430	Average$940	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$450	Average$734	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$472	Average$656	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$502	Average$847	FlexibilityNo cancel fee	On-time70%
Aer Lingus	Cheapest$531	Average$819	FlexibilityNo cancel fee	On-timeN/A
Finnair	Cheapest$547	Average$750	FlexibilityNo cancel fee	On-time76%

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$227+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to United Kingdom with Cheapflights

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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 September 17, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to United Kingdom

Cheapest flights from Illinois to United KingdomExplore 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 September 17, 2025.

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 September 17, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to the United Kingdom that are best for you.

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.

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?

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 September 17, 2025.

Weekly flight availability from Illinois to United Kingdom

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?

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

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

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

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

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

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.

Top 10 airlines flying from Illinois to United Kingdom

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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 September 17, 2025.