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).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Luton Airport to Illinois as you normally would.

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

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

How can I find direct flights from Luton to Illinois?

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

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

Yes. Cheapflights offers flight deals from Luton 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.

£346+ Cheap Flights from London Luton Airport to Illinois

Cheap flight deals from Luton to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Luton to Illinois
Explore the most affordable flight options available from Luton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2026.

Wed 16/906:15 -

1 stop13h 45m

Wed 23/915:45 -

1 stop11h 15m

Deal found 24/8£479

Wed 16/913:50 -

1 stop11h 25m

Mon 28/915:45 -

1 stop11h 30m

Deal found 25/8£530

Mon 31/808:15 -

1 stop11h 45m

Mon 7/915:45 -

1 stop15h 00m

Deal found 24/8£531

Thu 15/1013:00 -

1 stop12h 15m

Sun 18/1015:45 -

1 stop13h 40m

Deal found 28/8£531

Sat 5/909:00 -

1 stop16h 15m

Thu 10/915:45 -

1 stop11h 45m

Deal found 26/8£533

Mon 14/908:15 -

2 stops16h 00m

Mon 28/919:25 -

2 stops21h 25m

Deal found 26/8£534

Mon 5/1014:25 -

2 stops31h 45m

Fri 9/1019:15 -

3 stops23h 15m

Deal found 25/8£534

Mon 14/908:15 -

2 stops16h 00m

Mon 21/919:25 -

2 stops21h 25m

Deal found 26/8£536

Sun 6/909:00 -

1 stop11h 00m

Sun 13/915:45 -

1 stop13h 40m

Deal found 28/8£537

Fri 16/1017:10 -

3 stops29h 00m

Sun 1/1119:15 -

2 stops20h 55m

Deal found 27/8£537

Wed 21/1013:50 -

2 stops32h 20m

Sat 31/1020:15 -

3 stops21h 25m

Deal found 24/8£538

Fri 9/1006:05 -

2 stops18h 36m

Fri 16/1012:10 -

2 stops18h 45m

Deal found 25/8£803

Best flights from Luton to Illinois
Discover carefully curated flight deals from Luton to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2026.

Sun 1/1106:00 -

1 stop17h 20m

Fri 6/1118:30 -

1 stop13h 25m

Deal found 26/8£553

Wed 14/1007:15 -

2 stops16h 35m

Sat 17/1015:45 -

1 stop10h 35m

Deal found 24/8£589

Mon 21/1215:35 -

1 stop31h 45m

Sun 27/1218:30 -

1 stop22h 00m

Deal found 24/8£610

Mon 21/1215:35 -

1 stop31h 45m

Thu 31/1218:30 -

1 stop12h 30m

Deal found 27/8£612

Tue 13/1013:10 -

1 stop12h 05m

Tue 20/1015:45 -

1 stop11h 30m

Deal found 28/8£621

Wed 23/915:20 -

3 stops30h 50m

Fri 2/1019:15 -

2 stops17h 50m

Deal found 26/8£627

Thu 1/1009:25 -

1 stop15h 50m

Fri 2/1015:45 -

1 stop16h 15m

Deal found 27/8£638

Mon 21/1208:00 -

1 stop15h 20m

Sun 3/118:30 -

1 stop22h 00m

Deal found 24/8£644

Wed 21/1005:40 -

2 stops15h 30m

Tue 27/1019:30 -

2 stops13h 20m

Deal found 28/8£647

Sun 4/1011:00 -

3 stops35h 10m

Sat 10/1019:15 -

3 stops20h 40m

Deal found 24/8£671

Fri 9/1008:25 -

1 stop17h 25m

Fri 16/1017:10 -

1 stop15h 35m

Deal found 25/8£677

Fri 9/1006:05 -

2 stops18h 36m

Fri 16/1012:10 -

2 stops15h 15m

Deal found 25/8£815

Mon 12/1019:50 -

2 stops24h 10m

Mon 19/1012:10 -

2 stops16h 50m

Deal found 27/8£912

Tue 13/1021:50 -

3 stops26h 51m

Tue 20/1012:10 -

2 stops20h 25m

Deal found 28/8£1,027

Sun 11/1019:55 -

2 stops23h 30m

Mon 19/1012:10 -

3 stops18h 35m

Deal found 26/8£1,050

Sat 10/1019:25 -

3 stops30h 55m

Sat 31/1016:05 -

3 stops22h 40m

Deal found 25/8£1,192

Thu 26/1116:10 -

2 stops27h 35m

Thu 10/1216:05 -

2 stops21h 50m

Deal found 27/8£1,385

Sun 11/1007:35 -

2 stops35h 50m

Thu 15/1012:10 -

2 stops24h 20m

Deal found 27/8£1,386

Find flight deals from Luton to Illinois

Round-trip from	£479
One-way from	£346
Popular in	August
Cheapest in	February
Average price	£722

16/9-23/9
2 total stops
25h 00m total
London to Illinois

Search Deals

3/9
2 total stops
28h 30m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£46 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

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 1/11

06:00-18:20

1 stop17h 20m

Chicago O'Hare Intl

Fri 6/11

18:30-13:55

1 stop13h 25m

£553

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 14/10

07:15-17:50

2 stops16h 35m

Chicago O'Hare Intl

Sat 17/10

15:45-08:20

1 stop10h 35m

£589

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 21/12

15:35-17:20

1 stop31h 45m

Chicago O'Hare Intl

Sun 27/12

18:30-22:30

1 stop22h 00m

£610

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 21/12

15:35-17:20

1 stop31h 45m

Chicago O'Hare Intl

Thu 31/12

18:30-13:00

1 stop12h 30m

£612

Fastest return journey

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Tue 13/10

13:10-19:15

1 stop12h 05m

Chicago O'Hare Intl

Tue 20/10

15:45-09:15

1 stop11h 30m

£621

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 23/9

15:20-16:10

3 stops30h 50m

Chicago O'Hare Intl

Fri 2/10

19:15-19:05

2 stops17h 50m

£627

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 1/10

09:25-19:15

1 stop15h 50m

Chicago O'Hare Intl

Fri 2/10

15:45-14:00

1 stop16h 15m

£638

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 21/12

08:00-17:20

1 stop15h 20m

Chicago O'Hare Intl

Sun 3/1

18:30-22:30

1 stop22h 00m

£644

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 21/10

05:40-15:10

2 stops15h 30m

Chicago O'Hare Intl

Tue 27/10

19:30-13:50

2 stops13h 20m

£647

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 4/10

11:00-16:10

3 stops35h 10m

Chicago O'Hare Intl

Sat 10/10

19:15-21:55

3 stops20h 40m

£671

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 40 resultsSorted by cheapest first

Best time to book a flight from Luton to Illinois

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

LTN-ORD

LTN-STL

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 London Luton Airport to Illinois

LTN-USIL

LTN-ORD

LTN-STL

No data available for this route at this time. Please check back soon.

Related info for your journey

Can I find deals for flights from Luton to Illinois that include hotel bookings?
Yes. In addition to deals on Luton to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Luton to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Luton to Illinois.
Can I find deals for business class flights from Luton to Illinois?
Yes. Cheapflights offers flight deals from Luton 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.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Top destinations

Alternative routes for Luton to Illinois

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Luton to Orlando flights

Heathrow to Ontario flights

London City to San Francisco flights

Stansted to San Francisco flights

Gatwick to Dallas/Fort Worth flights

Heathrow to Fort Lauderdale flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Luton to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Luton to Illinois for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Luton to Illinois with no change fees.

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

Yes! Start tracking prices for Luton to Illinois flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from London Luton Airport to Illinois from £346

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Luton to Illinois

Cheapest flights from Luton to IllinoisExplore the most affordable flight options available from Luton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2026.

Explore the most affordable flight options available from Luton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2026.

Best flights from Luton to IllinoisDiscover carefully curated flight deals from Luton to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2026.

Discover carefully curated flight deals from Luton to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 29 August 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 29 August 2026 and is based on user searches.

One-way flights from Luton to IllinoisSearch for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 29 August 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 29 August 2026.

Find flight deals from Luton to Illinois

Round-trip from

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Average price

Cheapflights Fare Finder

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

Best time to book a flight from Luton to Illinois

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

Cheapflights Insights

Related info for your journey

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

How can I find direct flights from Luton to Illinois?

Can I find deals for business class flights from Luton 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 Luton 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 Luton to Illinois by cabin class

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

Luton and Illinois flights

Browse other Luton and Illinois flight options. Last updated on 29 August 2026.

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Luton to Illinois flights

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

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Cheapest flights from Luton to Illinois
Explore the most affordable flight options available from Luton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2026.

Best flights from Luton to Illinois
Discover carefully curated flight deals from Luton to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 29 August 2026 and is based on user searches.

One-way flights from Luton to Illinois
Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 29 August 2026.