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

£354 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and Aer Lingus, with prices starting from £376 and £402, respectively.

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

To save up to 16% on this flight, we recommend booking at least 45 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from United Kingdom to Illinois from £535 1-2 weeks out and tickets from £662 for flights departing within the next 72 hours.

What is the cheapest month to fly from United Kingdom to Illinois?

Our data shows that February tends to be the cheapest month to fly to Illinois from United Kingdom. Users have commonly found prices around £551 for the month, but tickets can be as low as £331. Due to multiple factors, prepare for potentially higher prices in August.

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.

£454+ Flights from the United Kingdom to Illinois

Cheap flight deals from United Kingdom to Illinois

Round-trip from	£417
One-way from	£247
Popular in	August
Cheapest in	February
Average price	£497
Good round-trip deal	£556 or less
Good one-way deal	£586 or less

Lufthansa
22/4-28/4
1 total stop
20h 25m total
United Kingdom to Illinois

Search Deals

11/5
3 total stops
32h 15m total
United Kingdom to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£59 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 March 2025

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

Find flight deals from United Kingdom to Illinois

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 31 March 2025.

Tue 22/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Mon 28/418:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 31/3£417

Sun 20/419:30LHR - ORD

1 stop23h 50mAustrian Airlines

Thu 15/511:10ORD - LHR

1 stop13h 45mAustrian Airlines

Deal found 31/3£417

Tue 22/406:55LHR - ORD

1 stop13h 00mLufthansa

Sat 17/514:35ORD - LHR

1 stop15h 45mLufthansa

Deal found 31/3£418

Tue 6/515:40LGW - ORD

1 stop32h 35mIcelandair

Mon 19/522:15ORD - LGW

1 stop10h 20mIcelandair

Deal found 31/3£420

Wed 23/409:55LHR - ORD

1 stop10h 45mVirgin Atlantic

Sat 26/418:35ORD - LHR

1 stop33h 40mVirgin Atlantic

Deal found 31/3£420

Sat 26/407:40LHR - ORD

1 stop12h 20mBritish Airways

Sat 3/522:20ORD - LHR

Nonstop7h 55mBritish Airways

Deal found 31/3£421

Mon 12/514:00LGW - ORD

2 stops24h 50mMultiple Airlines

Wed 14/505:51ORD - LGW

1 stop18h 29mMultiple Airlines

Deal found 31/3£421

Tue 30/921:25LHR - ORD

1 stop26h 50mIcelandair

Thu 16/1019:25ORD - LHR

1 stop10h 30mIcelandair

Deal found 31/3£423

Sat 19/406:30LHR - ORD

1 stop14h 15mUnited Airlines

Sat 26/416:15ORD - LHR

1 stop32h 40mUnited Airlines

Deal found 31/3£424

Wed 30/408:15STN - ORD

2 stops16h 00mMultiple Airlines

Wed 7/519:25ORD - STN

2 stops19h 30mMultiple Airlines

Deal found 31/3£427

Sat 25/1006:40LHR - ORD

1 stop15h 30mScandinavian Airlines

Sat 8/1119:30ORD - LHR

1 stop20h 10mScandinavian Airlines

Deal found 31/3£428

Tue 29/408:45LCY - ORD

1 stop17h 10mMultiple Airlines

Sun 4/518:35ORD - LCY

1 stop11h 55mMultiple Airlines

Deal found 30/3£429

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 31 March 2025.

Tue 22/406:00LHR - ORD

1 stop12h 10mMultiple Airlines

Mon 28/418:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 31/3£417

Sun 20/419:30LHR - ORD

1 stop23h 50mAustrian Airlines

Thu 15/516:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 31/3£417

Tue 22/407:25LHR - ORD

1 stop12h 30mUnited Airlines

Mon 28/413:28ORD - LHR

1 stop11h 27mUnited Airlines

Deal found 31/3£418

Sat 19/406:30LHR - ORD

1 stop14h 15mLufthansa

Wed 14/514:35ORD - LHR

1 stop15h 45mLufthansa

Deal found 31/3£419

Tue 6/515:40LGW - ORD

1 stop32h 35mIcelandair

Mon 19/522:15ORD - LGW

1 stop10h 20mIcelandair

Deal found 31/3£420

Sat 26/407:40LHR - ORD

1 stop12h 20mBritish Airways

Sat 3/517:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 29/3£421

Sat 19/408:40LHR - ORD

1 stop11h 30mVirgin Atlantic

Fri 2/517:05ORD - LHR

1 stop9h 50mVirgin Atlantic

Deal found 30/3£421

Fri 2/515:05LGW - ORD

2 stops25h 32mFinnair

Sun 4/522:10ORD - LGW

2 stops28h 00mFinnair

Deal found 30/3£432

Wed 23/409:25LCY - ORD

1 stop12h 30mSWISS

Tue 6/518:35ORD - LCY

1 stop16h 55mSWISS

Deal found 30/3£433

Sun 20/408:45LHR - ORD

2 stops16h 45mAir Canada

Sun 27/407:20ORD - LHR

1 stop20h 40mAir Canada

Deal found 31/3£437

Thu 1/509:20LHR - MDW

1 stop12h 52mKLM

Tue 6/515:02MDW - LHR

1 stop11h 53mKLM

Deal found 31/3£443

Tue 16/911:45LHR - MDW

1 stop12h 51mAir France

Tue 23/915:40MDW - LHR

1 stop13h 30mAir France

Deal found 31/3£444

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 31 March 2025.

Fri 25/409:15LHR - ORD

Nonstop8h 30mBritish Airways

Mon 5/517:40ORD - LHR

Nonstop7h 40mBritish Airways

Deal found 31/3£424

Thu 15/511:05LHR - ORD

Nonstop9h 05mLufthansa

Thu 22/516:05ORD - LHR

Nonstop8h 15mLufthansa

Deal found 31/3£438

Sat 19/408:30LHR - ORD

Nonstop9h 05mBrussels Airlines

Fri 2/518:05ORD - LHR

Nonstop8h 15mBrussels Airlines

Deal found 31/3£441

Sat 19/414:10LHR - ORD

Nonstop9h 05mUnited Airlines

Fri 2/518:05ORD - LHR

Nonstop8h 15mUnited Airlines

Deal found 31/3£444

Sat 19/414:25LHR - ORD

Nonstop8h 35mAmerican Airlines

Sat 17/516:55ORD - LHR

Nonstop7h 55mAmerican Airlines

Deal found 31/3£451

Tue 6/512:15LHR - ORD

Nonstop8h 25mIberia

Mon 19/522:25ORD - LHR

Nonstop7h 50mIberia

Deal found 31/3£459

Sun 20/412:15LHR - ORD

Nonstop8h 30mFinnair

Fri 16/516:55ORD - LHR

Nonstop7h 55mFinnair

Deal found 31/3£476

Fri 16/514:25LHR - ORD

Nonstop8h 35mMultiple Airlines

Mon 19/522:25ORD - LHR

Nonstop7h 50mMultiple Airlines

Deal found 31/3£477

Wed 16/414:10LHR - ORD

Nonstop9h 05mAustrian Airlines

Thu 15/518:05ORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 31/3£500

Fri 2/511:30EDI - ORD

Nonstop8h 35mUnited Airlines

Mon 5/518:35ORD - EDI

Nonstop7h 50mUnited Airlines

Deal found 31/3£519

Wed 21/511:30EDI - ORD

Nonstop8h 35mLufthansa

Thu 5/618:40ORD - EDI

Nonstop7h 45mLufthansa

Deal found 31/3£697

Last-minute flights from United Kingdom to Illinois
Discover last-minute flight deals from United Kingdom to Illinois. Data last updated 31 March 2025 and is based on user searches.

Mon 7/420:10LCY - ORD

1 stop24h 30mMultiple Airlines

Mon 14/416:20ORD - LCY

1 stop9h 50mMultiple Airlines

Deal found 30/3£615

Tue 8/421:35LGW - ORD

2 stops26h 45mMultiple Airlines

Tue 15/419:25ORD - LGW

2 stops13h 45mMultiple Airlines

Deal found 30/3£509

Tue 8/411:05LHR - ORD

Nonstop9h 05mBrussels Airlines

Tue 22/416:10ORD - LHR

1 stop35h 30mBrussels Airlines

Deal found 31/3£564

Wed 9/417:10LHR - ORD

1 stop28h 45mMultiple Airlines

Wed 16/416:05ORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 31/3£523

Wed 9/408:30LHR - ORD

1 stop12h 15mUnited Airlines

Wed 16/414:35ORD - LHR

1 stop15h 45mUnited Airlines

Deal found 31/3£536

Wed 9/409:15LHR - ORD

Nonstop8h 30mBritish Airways

Wed 16/417:45ORD - LHR

Nonstop7h 35mBritish Airways

Deal found 31/3£541

Wed 9/406:30LHR - ORD

2 stops14h 43mDelta

Wed 16/414:52ORD - LHR

1 stop16h 38mDelta

Deal found 31/3£567

Wed 9/408:40LHR - MDW

2 stops15h 22mDelta

Wed 16/409:52MDW - LHR

1 stop15h 23mDelta

Deal found 31/3£567

Wed 9/407:45LCY - ORD

2 stops15h 42mVirgin Atlantic

Wed 16/416:50ORD - LCY

1 stop17h 50mVirgin Atlantic

Deal found 30/3£580

Wed 9/415:15LHR - MDW

1 stop13h 06mAir France

Wed 16/412:48MDW - LHR

1 stop11h 57mAir France

Deal found 31/3£581

Wed 9/408:40LCY - ORD

1 stop12h 00mKLM

Wed 16/416:50ORD - LCY

1 stop10h 00mKLM

Deal found 31/3£595

Wed 9/406:00EDI - ORD

1 stop14h 40mDelta

Wed 16/412:15ORD - EDI

2 stops14h 10mDelta

Deal found 31/3£624

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 31 March 2025.

Sun 11/509:35EDI - ORD

3 stops32h 15mMultiple Airlines

Deal found 30/3£247

Fri 5/914:00LGW - ORD

1 stop30h 15mMultiple Airlines

Deal found 30/3£339

Wed 13/806:15LTN - ORD

2 stops16h 29mMultiple Airlines

Deal found 31/3£339

Tue 22/411:40STN - ORD

3 stops42h 40mMultiple Airlines

Deal found 31/3£345

Wed 23/408:50LCY - ORD

3 stops59h 36mMultiple Airlines

Deal found 30/3£346

Fri 2/513:45LHR - ORD

2 stops23h 18mMultiple Airlines

Deal found 31/3£348

Wed 7/506:00LHR - ORD

1 stop16h 10mTAP AIR PORTUGAL

Deal found 31/3£354

Sat 21/606:15LHR - MDW

3 stops32h 30mMultiple Airlines

Deal found 31/3£356

Thu 22/514:50LGW - ORD

1 stop31h 20mTAP AIR PORTUGAL

Deal found 30/3£370

Sun 7/915:40LGW - ORD

1 stop11h 35mIcelandair

Deal found 30/3£376

Tue 29/720:55MAN - ORD

2 stops42h 45mMultiple Airlines

Deal found 30/3£382

Mon 21/409:50LHR - ORD

1 stop15h 10mAer Lingus

Deal found 29/3£402

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

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 22/4

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Mon 28/4

18:05-08:20

Nonstop8h 15m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 20/4

19:30-13:20

1 stop23h 50m

Chicago O'Hare Intl

Thu 15/5

16:05-06:20

Nonstop8h 15m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 22/4

06:55-13:55

1 stop13h 00m

Chicago O'Hare Intl

Wed 14/5

18:05-08:20

Nonstop8h 15m

£418

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 6/5

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Mon 19/5

22:15-14:35

1 stop10h 20m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

09:55-14:40

1 stop10h 45m

Chicago O'Hare Intl

Sat 26/4

18:35-10:15

1 stop33h 40m

£420

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 26/4

07:40-14:00

1 stop12h 20m

Chicago O'Hare Intl

Sat 3/5

22:20-12:15

Nonstop7h 55m

£421

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 12/5

14:00-08:50

2 stops24h 50m

Chicago O'Hare Intl

Wed 14/5

05:51-06:20

1 stop18h 29m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 19/4

06:30-14:45

1 stop14h 15m

Chicago O'Hare Intl

Sat 26/4

16:15-06:55

1 stop32h 40m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 28/5

21:25-21:15

1 stop29h 50m

Chicago O'Hare Intl

Tue 16/9

19:25-20:20

1 stop18h 55m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 19/4

09:30-14:55

1 stop11h 25m

Chicago O'Hare Intl

Fri 2/5

14:00-06:35

1 stop10h 35m

£430

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 60 results

...

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.

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

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £595). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £843). 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 Sunday (54 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (39 on average).

Rainfall in Illinois by month

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.

Temperature in Illinois by month

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).

Reviews of airlines servicing Illinois

To help decide which airline to fly from United Kingdom to Illinois, see what other customers have to say about Delta, KLM and LOT. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,899 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT

7.6

Good

1,065 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

770 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from United Kingdom to Illinois one-way?
£354 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and Aer Lingus, with prices starting from £376 and £402, 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, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £595). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £843). 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 for United Kingdom to Illinois

Heathrow to John F Kennedy Intl flights

Heathrow to Newark flights

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Complete your trip

Illinois car hire

Chicago O'Hare Intl Airport car hire

Chicago Midway Airport car hire

Moline Quad-City Airport car hire

Greater Peoria Airport car hire

Bloomington-Normal Airport car hire

Springfield Capital Airport car hire

Chicago Greater Rockford Airport car hire

Champaign University-Willard Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Quincy Regional Airport car hire

Direct flights to United States

Find a return flight route from Illinois

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Top 10 airlines flying from United Kingdom to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£324	Average£568	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£340	Average£627	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Air France	Cheapest£350	Average£483	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Scandinavian Airlines	Cheapest£367	Average£505	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£381	Average£611	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
British Airways	Cheapest£393	Average£747	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Austrian Airlines	Cheapest£422	Average£578	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£424	Average£653	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£424	Average£635	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£428	Average£609	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

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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.

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Cheap flights from the United Kingdom to Illinois from £247

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 11/5. 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

Keep the following information in mind while searching for United Kingdom to Illinois flight deals. Data was last updated 31 March 2025.

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Find 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 31 March 2025.

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 31 March 2025.

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

Everything you need to know about your flight from the United Kingdom to Illinois

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 31 March 2025.

Weekly flight availability from United Kingdom to Illinois

Rainfall in Illinois by month

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

Temperature in Illinois by month

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

Reviews of airlines servicing Illinois

To help decide which airline to fly from United Kingdom to Illinois, see what other customers have to say about Delta, KLM and LOT. 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

Find useful and relevant information for your journey from United Kingdom to Illinois. 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 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

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Alternative routes for United Kingdom to Illinois

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

Top 10 airlines flying from United Kingdom to Illinois

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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?

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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 31 March 2025.