How long is the flight from United Kingdom to Illinois?

A quick flight from United Kingdom to Illinois can take about 9h 20m. British Airways provides one of the quickest options available for as low as £568. The distance between United Kingdom and Illinois is about 3939 mi. Both multi-stop and direct flights can be found to your destination and back.

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

£210 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on JetBlue and Aer Lingus, with prices starting from £312 and £317, 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 United Kingdom to Illinois that include hotel bookings?

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

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

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

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

Yes. Cheapflights offers flight deals from United Kingdom 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.

£286+ Cheap Flights from the United Kingdom to Illinois

Cheap flight deals from United Kingdom to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from United Kingdom to Illinois
Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Wed 25/1119:10 -

1 stop27h 35m

Mon 30/1119:15 -

1 stop17h 10m

Deal found 17/9£338

Sun 1/1109:25 -

1 stop13h 20m

Sun 8/1119:15 -

1 stop17h 10m

Deal found 17/9£426

Wed 4/1106:30 -

2 stops16h 50m

Wed 11/1118:30 -

2 stops21h 50m

Deal found 14/9£462

Fri 20/1106:05 -

1 stop14h 05m

Sat 28/1115:55 -

1 stop10h 40m

Deal found 15/9£476

Fri 13/1106:05 -

1 stop14h 05m

Tue 17/1120:05 -

1 stop15h 05m

Deal found 15/9£477

Sat 14/1106:00 -

1 stop14h 10m

Wed 18/1120:05 -

1 stop14h 35m

Deal found 15/9£482

Thu 12/1107:30 -

1 stop12h 40m

Mon 16/1120:05 -

1 stop13h 05m

Deal found 16/9£482

Wed 18/1106:30 -

1 stop13h 40m

Sun 22/1120:05 -

1 stop14h 45m

Deal found 15/9£485

Thu 19/1107:30 -

1 stop12h 40m

Tue 24/1120:05 -

1 stop15h 05m

Deal found 13/9£486

Sun 15/1106:00 -

1 stop18h 20m

Sun 22/1115:55 -

1 stop18h 25m

Deal found 15/9£487

Mon 2/1108:10 -

1 stop12h 00m

Mon 16/1120:05 -

1 stop14h 40m

Deal found 16/9£502

Mon 9/1109:50 -

1 stop14h 30m

Sun 22/1115:55 -

1 stop15h 40m

Deal found 14/9£504

Best flights from United Kingdom to Illinois
Discover carefully curated flight deals from United Kingdom to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Thu 1/1005:40 -

2 stops19h 35m

Thu 15/1015:45 -

2 stops20h 20m

Deal found 13/9£535

Wed 30/908:50 -

1 stop11h 10m

Sat 10/1018:35 -

Nonstop8h 00m

Deal found 17/9£549

Mon 2/1111:15 -

1 stop16h 40m

Mon 9/1110:31 -

2 stops18h 19m

Deal found 17/9£568

Mon 2/1110:25 -

Nonstop9h 20m

Mon 16/1117:45 -

Nonstop8h 10m

Deal found 17/9£568

Mon 2/1109:15 -

2 stops15h 00m

Mon 16/1116:10 -

1 stop14h 40m

Deal found 17/9£582

Mon 5/1006:30 -

2 stops22h 14m

Mon 12/1017:09 -

2 stops13h 56m

Deal found 17/9£589

Mon 2/1106:20 -

2 stops17h 40m

Mon 16/1113:05 -

1 stop13h 55m

Deal found 17/9£589

Mon 23/1119:10 -

1 stop27h 35m

Sat 28/1119:15 -

1 stop17h 10m

Deal found 15/9£595

Tue 24/1116:35 -

1 stop28h 55m

Wed 2/1219:00 -

1 stop14h 05m

Deal found 14/9£604

Mon 2/1110:55 -

1 stop38h 25m

Mon 16/1120:15 -

1 stop31h 40m

Deal found 14/9£677

Thu 22/1010:40 -

2 stops35h 30m

Sun 25/1020:15 -

2 stops21h 50m

Deal found 17/9£547

Sat 21/1107:45 -

1 stop12h 25m

Wed 2/1220:05 -

1 stop10h 35m

Deal found 17/9£565

Sun 4/1008:00 -

Nonstop9h 10m

Sat 10/1018:05 -

Nonstop8h 25m

Deal found 15/9£582

Tue 17/1106:30 -

2 stops16h 09m

Tue 1/1211:28 -

1 stop14h 22m

Deal found 15/9£589

Wed 18/1119:10 -

1 stop27h 35m

Sat 28/1119:15 -

1 stop17h 10m

Deal found 15/9£595

Sat 31/1006:20 -

2 stops21h 13m

Sat 7/1111:33 -

2 stops13h 47m

Deal found 16/9£595

Mon 2/1109:00 -

2 stops15h 15m

Mon 16/1116:10 -

2 stops15h 30m

Deal found 16/9£595

Mon 12/1014:25 -

3 stops31h 45m

Mon 19/1019:15 -

2 stops21h 35m

Deal found 14/9£563

Wed 30/916:25 -

1 stop26h 15m

Sat 10/1018:05 -

2 stops35h 15m

Deal found 13/9£629

Wed 30/908:00 -

Nonstop9h 10m

Sat 10/1021:30 -

Nonstop8h 25m

Deal found 13/9£583

Mon 2/1110:00 -

1 stop12h 15m

Mon 16/1112:38 -

2 stops14h 22m

Deal found 17/9£596

Mon 2/1111:00 -

Nonstop8h 45m

Fri 13/1117:10 -

Nonstop7h 45m

Deal found 16/9£598

Mon 2/1110:00 -

2 stops19h 57m

Mon 9/1106:23 -

2 stops20h 37m

Deal found 17/9£600

Thu 22/1018:40 -

1 stop27h 30m

Sun 25/1020:15 -

1 stop17h 15m

Deal found 17/9£601

Mon 2/1109:15 -

2 stops15h 00m

Mon 9/1115:40 -

2 stops15h 10m

Deal found 17/9£612

Thu 22/1008:30 -

2 stops15h 45m

Sun 25/1019:30 -

2 stops20h 35m

Deal found 17/9£564

Tue 22/921:15 -

2 stops24h 45m

Wed 21/1018:00 -

2 stops20h 30m

Deal found 17/9£637

Wed 14/1017:45 -

1 stop21h 55m

Sun 25/1012:45 -

1 stop16h 10m

Deal found 15/9£707

Thu 10/1206:35 -

1 stop17h 50m

Tue 5/120:50 -

1 stop27h 40m

Deal found 15/9£599

Tue 24/1112:35 -

Nonstop8h 55m

Tue 1/1221:50 -

Nonstop7h 45m

Deal found 14/9£601

Find flight deals from United Kingdom to Illinois

Round-trip from	£338
One-way from	£286
Popular in	August
Cheapest in	February
Average price	£609
Good round-trip deal	£611 or less
Good one-way deal	£532 or less

Scandinavian Airlines
25/11-30/11
2 total stops
44h 45m total
United Kingdom to Illinois

Search Deals

10/1-31/12
2 total stops
17h 15m total
United Kingdom to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£65 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

EdinburghChicago

EDI Edinburgh Turnhouse - ORD Chicago O'Hare Intl

EDIORD

Edinburgh Turnhouse

Mon 2/11

22:35-16:45

3 stops48h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£300

ManchesterChicago

MAN Manchester - ORD Chicago O'Hare Intl

MANORD

Manchester

Sun 1/11

08:15-16:45

2 stops38h 30m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£317

EdinburghChicago

EDI Edinburgh Turnhouse - ORD Chicago O'Hare Intl

EDIORD

Edinburgh Turnhouse

Sun 13/12

06:05-17:20

3 stops41h 15m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£325

EdinburghChicago

EDI Edinburgh Turnhouse - ORD Chicago O'Hare Intl

EDIORD

Edinburgh Turnhouse

Mon 23/11

07:55-17:20

2 stops15h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£341

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 31/1

07:45-14:55

1 stop37h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£354

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Mon 2/11

09:00-16:15

1 stop13h 15m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£355

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Tue 27/10

18:40-17:15

1 stop27h 35m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£373

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Sat 14/11

09:00-16:15

1 stop13h 15m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£403

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Sun 29/11

09:30-13:10

1 stop33h 40m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£407

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Wed 11/11

06:30-13:45

1 stop13h 15m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£413

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from United Kingdom to Illinois

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

LTN-ORD

LHR-ORD

LGW-ORD

LCY-ORD

LHR-MDW

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 the United Kingdom to Illinois

GB0-USIL

LTN-ORD

LHR-ORD

LGW-ORD

LCY-ORD

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

Currently, February is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £497). Flying from United Kingdom to Illinois in August is currently the most expensive (average of £803). 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 GB to IL?

When flying from United Kingdom 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 United Kingdom to Illinois

The most flights from GB0 to USIL are scheduled on a Thursday (49 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (39 on average).

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

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Illinois

Read through reviews of airlines operating flights from the United Kingdom to Illinois, such as Scandinavian Airlines,Aer Lingus, andIcelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Scandinavian Airlines

7.4

Good

1,984 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

1,984 reviews

Scandinavian Airlines

7.4

Good

1,984 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

1,767 reviews

Scandinavian Airlines

7.4

Good

1,984 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

6.9

Okay

746 reviews

Scandinavian Airlines

7.4

Good

1,984 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

8,235 reviews

Scandinavian Airlines

7.4

Good

1,984 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

8,228 reviews

Scandinavian Airlines

7.4

Good

1,984 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 United Kingdom to Illinois?
A quick flight from United Kingdom to Illinois can take about 9h 20m. British Airways provides one of the quickest options available for as low as £568. The distance between United Kingdom and Illinois is about 3939 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines to fly from United Kingdom to Illinois one-way?
£210 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on JetBlue and Aer Lingus, with prices starting from £312 and £317, respectively.
Can I find deals for flights from United Kingdom to Illinois that include hotel bookings?
Yes. In addition to deals on United Kingdom to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from United Kingdom to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Illinois.
Can I find deals for business class flights from United Kingdom to Illinois?
Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Illinois?
Currently, February is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £497). Flying from United Kingdom to Illinois in August is currently the most expensive (average of £803). 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

Airlines

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Return Flight Options

Top destinations

Airlines flying to Illinois

Icelandair flights to Illinois

Aer Lingus flights to Illinois

Finnair flights to Illinois

Lufthansa flights to Illinois

British Airways flights to Illinois

Top 10 airlines flying from United Kingdom to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£30	Average£62	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
Icelandair	Cheapest£204	Average£573	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£331	Average£712	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Turkish Airlines	Cheapest£349	Average£696	FlexibilityNo cancel fee	On-time77%	Search Turkish Airlines flights
Scandinavian Airlines	Cheapest£384	Average£535	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
JetBlue	Cheapest£385	Average£651	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
TAP AIR PORTUGAL	Cheapest£389	Average£583	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£396	Average£668	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
British Airways	Cheapest£415	Average£657	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£430	Average£708	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

Fly with Cheapflights

How does Cheapflights help users find flights from United Kingdom to Illinois?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from United Kingdom today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from United Kingdom.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Illinois, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on United Kingdom to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.

Cheap flights from the United Kingdom to Illinois from £286

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from United Kingdom to Illinois

Cheapest flights from United Kingdom to IllinoisExplore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Best flights from United Kingdom to IllinoisDiscover carefully curated flight deals from United Kingdom to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Discover carefully curated flight deals from United Kingdom to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Direct flights from United Kingdom to IllinoisExplore direct flight options from United Kingdom to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2026.

Explore direct flight options from United Kingdom to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2026.

Last-minute flights from United Kingdom to IllinoisDiscover last-minute flight deals from United Kingdom to Illinois. Data last updated 18 September 2026 and is based on user searches.

Discover last-minute flight deals from United Kingdom to Illinois. Data last updated 18 September 2026 and is based on user searches.

One-way flights from United Kingdom to IllinoisSearch for one-way flight options from United Kingdom to Illinois. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.

Search for one-way flight options from United Kingdom to Illinois. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.

Find flight deals from United Kingdom 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 the United Kingdom to Illinois that are best for you.

Best time to book a flight from United Kingdom to Illinois

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

Cheapflights Insights

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

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

Find hourly flight availability from United Kingdom 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 18 September 2026.

When flying from United Kingdom 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 United Kingdom to Illinois

The most flights from GB0 to USIL are scheduled on a Thursday (49 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (39 on average).

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

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Illinois

Read through reviews of airlines operating flights from the United Kingdom to Illinois, such as Scandinavian Airlines,Aer Lingus, andIcelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from United Kingdom to Illinois?

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

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

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

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

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

Airlines flying to Illinois

Alternative routes for United Kingdom 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 United Kingdom to Illinois by cabin class

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

United Kingdom and Illinois flights

Browse other United Kingdom and Illinois flight options. Last updated on 18 September 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 United Kingdom after your stay in Illinois

United Kingdom to Illinois flights

Consider these flights travelling from United Kingdom to Illinois.

Top 10 airlines flying from United Kingdom to Illinois

Fly with Cheapflights

How does Cheapflights help users find flights from United Kingdom to Illinois?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from United Kingdom to Illinois
Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Best flights from United Kingdom to Illinois
Discover carefully curated flight deals from United Kingdom to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Direct flights from United Kingdom to Illinois
Explore direct flight options from United Kingdom to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2026.

Last-minute flights from United Kingdom to Illinois
Discover last-minute flight deals from United Kingdom to Illinois. Data last updated 18 September 2026 and is based on user searches.

One-way flights from United Kingdom to Illinois
Search for one-way flight options from United Kingdom to Illinois. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.