How long is the flight from England to Illinois?

Scandinavian Airlines, Icelandair, and SWISS can get you from England to Illinois in just under 11h 45m. Your travel time can differ by up to 22h 05m. The distance between England and Illinois is about 3960 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £295. Users have also found prices from £310 and £322 on JetBlue and Austrian Airlines, respectively.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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

Yes. In addition to deals on England to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from England to Illinois?

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

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

Yes. Cheapflights offers flight deals from England to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£281+ Cheap Flights from England to Illinois

Cheap flight deals from England to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from England to Illinois
Explore the most affordable flight options available from England to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.

Sat 5/911:30 -

Nonstop8h 35m

Sat 5/920:40 -

1 stop28h 40m

Deal found 4/8£433

Thu 3/915:10 -

2 stops33h 05m

Sun 13/919:25 -

2 stops23h 00m

Deal found 3/8£434

Thu 29/1007:30 -

2 stops15h 50m

Tue 3/1118:30 -

2 stops21h 05m

Deal found 3/8£445

Wed 25/1106:00 -

2 stops17h 20m

Mon 30/1118:30 -

2 stops22h 00m

Deal found 4/8£454

Mon 16/1107:35 -

1 stop12h 25m

Sun 22/1120:10 -

1 stop17h 35m

Deal found 3/8£477

Tue 22/916:25 -

1 stop29h 35m

Wed 21/1018:00 -

1 stop33h 45m

Deal found 5/8£481

Fri 4/906:35 -

1 stop13h 25m

Fri 11/921:00 -

1 stop18h 20m

Deal found 5/8£481

Thu 1/1019:50 -

1 stop26h 10m

Sun 11/1018:00 -

1 stop34h 20m

Deal found 5/8£481

Wed 18/1106:00 -

1 stop14h 00m

Wed 25/1120:10 -

1 stop14h 30m

Deal found 3/8£481

Wed 7/1015:40 -

1 stop11h 45m

Wed 14/1022:25 -

1 stop10h 15m

Deal found 5/8£482

Tue 6/1021:25 -

1 stop26h 50m

Tue 13/1019:25 -

1 stop18h 55m

Deal found 4/8£483

Thu 3/913:00 -

1 stop12h 15m

Thu 10/921:00 -

1 stop20h 25m

Deal found 4/8£483

Best flights from England to Illinois
Discover carefully curated flight deals from England to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 August 2026.

Mon 28/912:25 -

3 stops33h 45m

Mon 5/1019:15 -

2 stops21h 35m

Deal found 4/8£507

Thu 12/1112:55 -

2 stops33h 50m

Fri 27/1119:15 -

2 stops31h 25m

Deal found 4/8£542

Wed 30/915:40 -

1 stop11h 45m

Sat 10/1019:25 -

1 stop13h 10m

Deal found 1/8£552

Mon 14/909:15 -

1 stop12h 40m

Mon 21/914:20 -

1 stop12h 20m

Deal found 31/7£582

Wed 16/916:25 -

1 stop26h 15m

Wed 23/918:00 -

2 stops20h 30m

Deal found 1/8£625

Fri 27/1112:20 -

1 stop12h 05m

Wed 2/1215:55 -

1 stop11h 10m

Deal found 4/8£628

Wed 2/906:30 -

2 stops22h 06m

Tue 8/909:29 -

2 stops15h 16m

Deal found 1/8£636

Mon 7/908:40 -

2 stops15h 21m

Mon 21/919:13 -

1 stop11h 52m

Deal found 5/8£636

Mon 31/817:55 -

2 stops29h 11m

Mon 7/912:27 -

1 stop26h 13m

Deal found 1/8£646

Wed 2/916:25 -

Nonstop9h 05m

Wed 23/921:35 -

Nonstop8h 00m

Deal found 4/8£654

Mon 16/1108:55 -

1 stop13h 19m

Tue 1/1213:22 -

1 stop12h 23m

Deal found 4/8£657

Wed 7/1006:55 -

1 stop32h 45m

Wed 21/1020:10 -

1 stop20h 00m

Deal found 3/8£671

Tue 8/909:40 -

2 stops17h 45m

Tue 22/919:25 -

2 stops20h 45m

Deal found 3/8£523

Wed 21/1009:20 -

2 stops36h 50m

Sun 25/1020:15 -

1 stop17h 10m

Deal found 1/8£552

Tue 1/913:05 -

1 stop11h 10m

Mon 21/919:25 -

1 stop10h 30m

Deal found 4/8£558

Fri 18/906:20 -

1 stop18h 55m

Fri 25/921:00 -

1 stop14h 25m

Deal found 4/8£553

Tue 15/921:05 -

2 stops25h 05m

Tue 22/919:15 -

1 stop16h 25m

Deal found 31/7£561

Wed 9/915:40 -

1 stop11h 45m

Wed 23/919:25 -

1 stop13h 15m

Deal found 5/8£566

Mon 7/918:40 -

1 stop23h 55m

Mon 21/921:35 -

2 stops14h 15m

Deal found 4/8£630

Tue 1/905:45 -

2 stops17h 14m

Sat 12/917:37 -

2 stops16h 53m

Deal found 31/7£647

Mon 7/910:25 -

2 stops19h 32m

Mon 21/917:10 -

1 stop10h 30m

Deal found 1/8£651

Sat 19/912:10 -

1 stop30h 25m

Sat 26/918:05 -

Nonstop8h 25m

Deal found 5/8£659

Sat 10/1010:50 -

1 stop28h 50m

Thu 15/1020:10 -

1 stop38h 40m

Deal found 1/8£676

Wed 16/912:15 -

1 stop14h 29m

Wed 23/921:35 -

Nonstop8h 00m

Deal found 2/8£677

Fri 23/1006:25 -

2 stops17h 25m

Wed 28/1016:55 -

1 stop11h 20m

Deal found 1/8£559

Wed 16/909:20 -

1 stop12h 55m

Sun 20/909:29 -

1 stop15h 41m

Deal found 1/8£680

Thu 8/1021:05 -

2 stops25h 05m

Tue 13/1019:15 -

1 stop17h 15m

Deal found 3/8£565

Wed 9/921:15 -

2 stops21h 25m

Sat 12/918:05 -

1 stop33h 40m

Deal found 5/8£693

Fri 28/813:05 -

1 stop14h 20m

Sun 6/919:25 -

1 stop10h 30m

Deal found 5/8£582

Tue 1/1219:05 -

1 stop23h 35m

Sun 6/1216:10 -

1 stop14h 40m

Deal found 1/8£645

Find flight deals from England to Illinois

Round-trip from	£433
One-way from	£281
Popular in	July
Cheapest in	February
Average price	£656
Good round-trip deal	£634 or less
Good one-way deal	£524 or less

Air Canada
5/9-5/9
1 total stop
37h 15m total
England to Illinois

Search Deals

20/10
3 total stops
30h 25m total
England to Illinois

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£82 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from England to Illinois.

Search Deals

Price to beat on a one-way flight from England to Illinois.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 28/9

12:25-16:10

3 stops33h 45m

Chicago O'Hare Intl

Mon 5/10

19:15-22:50

2 stops21h 35m

£507

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Tue 8/9

09:40-21:25

2 stops17h 45m

Chicago O'Hare Intl

Tue 22/9

19:25-22:10

2 stops20h 45m

£523

ManchesterChicago

MAN Manchester - ORD Chicago O'Hare Intl

MANORD

Manchester

Thu 12/11

12:55-16:45

2 stops33h 50m

Chicago O'Hare Intl

Fri 27/11

19:15-08:40

2 stops31h 25m

£542

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 30/9

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Sat 10/10

19:25-14:35

1 stop13h 10m

£552

EdinburghChicago

EDI Edinburgh Turnhouse - ORD Chicago O'Hare Intl

EDIORD

Edinburgh Turnhouse

Wed 21/10

09:20-16:10

2 stops36h 50m

Chicago O'Hare Intl

Sun 25/10

20:15-18:25

1 stop17h 10m

£552

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 18/9

06:20-19:15

1 stop18h 55m

Chicago O'Hare Intl

Fri 25/9

21:00-17:25

1 stop14h 25m

£553

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Tue 1/9

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Mon 21/9

19:25-11:55

1 stop10h 30m

£558

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 23/10

06:25-17:50

2 stops17h 25m

Chicago O'Hare Intl

Wed 28/10

16:55-09:15

1 stop11h 20m

£559

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Tue 15/9

21:05-16:10

2 stops25h 05m

Chicago O'Hare Intl

Tue 22/9

19:15-17:40

1 stop16h 25m

£561

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Thu 8/10

21:05-16:10

2 stops25h 05m

Chicago O'Hare Intl

Tue 13/10

19:15-18:30

1 stop17h 15m

£565

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from England to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from England with our price prediction graph.

EDI-ORD

LGW-ORD

LHR-ORD

LTN-ORD

STN-ORD

Estimated return 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 England to Illinois

GBENG-USIL

EDI-ORD

LGW-ORD

LHR-ORD

LTN-ORD

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

Currently, February is the cheapest month in which you can book a flight from England to Illinois (average of £472). Flying from England to Illinois in July is currently the most expensive (average of £772). 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 ENG to IL?

When flying from England to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from England to Illinois

The most flights from GBENG to USIL are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

How much does it cost for a return flight from England to Illinois?

Airfare is below average for this route at the moment.

England to Illinois flights typically cost between £549 and £821 in October.
The cheapest return price found within the last 5 days was £483 on Icelandair (6 Oct–13 Oct).

How far ahead should I book a flight from England to Illinois?

The best time to book flights from England to Illinois is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Scandinavian Airlines,Aer Lingus, andIcelandair from England to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Scandinavian Airlines

7.4

Good

1,924 reviews

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Aer Lingus

7.3

Good

1,690 reviews

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Icelandair

7.0

Good

721 reviews

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Lufthansa

6.8

Okay

8,176 reviews

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

British Airways

6.7

Okay

8,147 reviews

Scandinavian Airlines

7.4

Good

1,924 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Robert,Jul 2026

CPH - SFO

First rate expereince.! We've never flown SAS before but will defintely fly it again.

Related info for your journey

How long is the flight from England to Illinois?
Scandinavian Airlines, Icelandair, and SWISS can get you from England to Illinois in just under 11h 45m. Your travel time can differ by up to 22h 05m. The distance between England and Illinois is about 3960 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from England to Illinois one-way?
For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £295. Users have also found prices from £310 and £322 on JetBlue and Austrian Airlines, respectively.
Can I find deals for flights from England to Illinois that include hotel bookings?
Yes. In addition to deals on England to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from England to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from England to Illinois.
Can I find deals for business class flights from England to Illinois?
Yes. Cheapflights offers flight deals from England to Illinois 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 England to Illinois?
Currently, February is the cheapest month in which you can book a flight from England to Illinois (average of £472). Flying from England to Illinois in July is currently the most expensive (average of £772). 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

Alternative routes

Complete your trip

Direct flights to United States

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Popular flights

Return Flight Options

Top destinations

Alternative routes for England to Illinois

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Top 10 airlines flying from England to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£36	Average£61	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
Virgin Atlantic	Cheapest£301	Average£649	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£340	Average£700	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	Cheapest£348	Average£527	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£374	Average£492	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£386	Average£573	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£394	Average£613	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
British Airways	Cheapest£410	Average£659	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£413	Average£689	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£427	Average£710	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

Fly with Cheapflights

How does Cheapflights help users find flights from England to Illinois?

When you search for this flight from England to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from England to Illinois?

Cheapflights helps you find that perfect flight to Illinois from England by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from England to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from England to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from England to Illinois become cheaper?

Of course! You can now track prices for flights from England to Illinois and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from England to Illinois from £281

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 20/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from England to Illinois

Cheapest flights from England to IllinoisExplore the most affordable flight options available from England to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.

Explore the most affordable flight options available from England to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.

Best flights from England to IllinoisDiscover carefully curated flight deals from England to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 August 2026.

Discover carefully curated flight deals from England to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 August 2026.

Direct flights from England to IllinoisExplore direct flight options from England to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 August 2026.

Explore direct flight options from England to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 August 2026.

Last-minute flights from England to IllinoisDiscover last-minute flight deals from England to Illinois. Data last updated 6 August 2026 and is based on user searches.

Discover last-minute flight deals from England to Illinois. Data last updated 6 August 2026 and is based on user searches.

One-way flights from England to IllinoisSearch for one-way flight options from England to Illinois. Find affordable one-way fares based on user searches. Data last updated 6 August 2026.

Search for one-way flight options from England to Illinois. Find affordable one-way fares based on user searches. Data last updated 6 August 2026.

Find flight deals from England to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Best time to book a flight from England to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from England with our price prediction graph.

Cheapflights Insights

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

What is the cheapest time of day to fly from ENG to IL?

Find hourly flight availability from England to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 August 2026.

When flying from England to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from England to Illinois

Explore weekly flight availability from England to Illinois. 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 6 August 2026.

The most flights from GBENG to USIL are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

How much does it cost for a return flight from England to Illinois?

Airfare is below average for this route at the moment.

England to Illinois flights typically cost between £549 and £821 in October.The cheapest return price found within the last 5 days was £483 on Icelandair (6 Oct–13 Oct).

How far ahead should I book a flight from England to Illinois?

The best time to book flights from England to Illinois is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Scandinavian Airlines,Aer Lingus, andIcelandair from England to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from England to Illinois?

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

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

How can I find direct flights from England to Illinois?

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

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

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 England to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from England to Illinois by cabin class

Find flights from England to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

England and Illinois flights

Browse other England and Illinois flight options. Last updated on 6 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Find a return flight route from Illinois

Find the right flight back to England after your stay in Illinois

England to Illinois flights

Consider these flights travelling from England to Illinois.

Top 10 airlines flying from England to Illinois

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How does Cheapflights help users find flights from England to Illinois?

Why should you use Cheapflights to find cheap flight tickets from England to Illinois?

Can Cheapflights find flights from England to Illinois with no change fees?

Can Cheapflights notify me if prices for flights from England to Illinois become cheaper?

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Travel Smart

Cheapest flights from England to Illinois
Explore the most affordable flight options available from England to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.

Best flights from England to Illinois
Discover carefully curated flight deals from England to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 August 2026.

Direct flights from England to Illinois
Explore direct flight options from England to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 August 2026.

Last-minute flights from England to Illinois
Discover last-minute flight deals from England to Illinois. Data last updated 6 August 2026 and is based on user searches.

One-way flights from England to Illinois
Search for one-way flight options from England to Illinois. Find affordable one-way fares based on user searches. Data last updated 6 August 2026.

England to Illinois flights typically cost between £549 and £821 in October.
The cheapest return price found within the last 5 days was £483 on Icelandair (6 Oct–13 Oct).