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 9 September 2026.

Tue 6/1013:10 -

1 stop12h 05m

Tue 13/1015:45 -

1 stop11h 30m

Deal found 6/9£524

Fri 25/906:20 -

1 stop13h 40m

Wed 30/915:45 -

1 stop17h 40m

Deal found 4/9£525

Thu 5/1121:30 -

1 stop23h 25m

Mon 16/1117:40 -

1 stop21h 10m

Deal found 4/9£526

Wed 7/1006:15 -

1 stop13h 45m

Wed 14/1015:45 -

1 stop11h 15m

Deal found 7/9£527

Mon 5/1009:00 -

2 stops34h 20m

Mon 12/1014:20 -

2 stops28h 50m

Deal found 4/9£528

Mon 19/1008:15 -

1 stop11h 45m

Wed 21/1021:00 -

1 stop12h 25m

Deal found 5/9£529

Thu 17/913:00 -

1 stop12h 15m

Wed 30/915:45 -

1 stop11h 15m

Deal found 8/9£530

Sat 17/1011:00 -

1 stop14h 15m

Sat 24/1021:00 -

1 stop14h 10m

Deal found 5/9£531

Wed 14/1013:50 -

1 stop11h 25m

Wed 21/1015:45 -

1 stop14h 50m

Deal found 8/9£533

Sat 3/1011:00 -

1 stop14h 15m

Mon 12/1015:45 -

1 stop11h 30m

Deal found 7/9£538

Wed 7/1006:10 -

2 stops21h 15m

Tue 13/1019:25 -

2 stops21h 00m

Deal found 6/9£539

Thu 22/1015:15 -

2 stops30h 45m

Wed 28/1020:00 -

2 stops20h 55m

Deal found 8/9£540

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 9 September 2026.

Sat 21/1111:05 -

2 stops35h 40m

Sat 5/1219:15 -

3 stops21h 25m

Deal found 6/9£533

Sat 3/1011:00 -

1 stop14h 15m

Mon 12/1015:45 -

1 stop11h 30m

Deal found 7/9£538

Thu 12/1108:20 -

2 stops15h 00m

Tue 24/1113:55 -

2 stops17h 50m

Deal found 6/9£546

Thu 29/1008:20 -

2 stops15h 00m

Mon 2/1118:30 -

2 stops16h 35m

Deal found 3/9£549

Sun 18/1006:25 -

1 stop21h 00m

Sun 25/1019:30 -

1 stop14h 35m

Deal found 3/9£559

Fri 20/1108:20 -

2 stops15h 00m

Wed 2/1215:45 -

2 stops17h 25m

Deal found 5/9£569

Thu 12/1106:00 -

1 stop17h 20m

Sun 15/1118:30 -

1 stop14h 35m

Deal found 7/9£572

Sat 31/1007:15 -

2 stops17h 05m

Sat 14/1118:30 -

2 stops19h 05m

Deal found 3/9£600

Thu 28/108:20 -

2 stops15h 00m

Mon 1/221:00 -

1 stop15h 00m

Deal found 6/9£607

Mon 9/1106:10 -

2 stops17h 10m

Wed 11/1118:30 -

2 stops17h 35m

Deal found 5/9£609

Tue 10/1107:45 -

2 stops15h 35m

Wed 11/1118:30 -

2 stops17h 35m

Deal found 5/9£610

Sat 31/1007:15 -

2 stops17h 05m

Mon 30/1115:55 -

2 stops15h 50m

Deal found 3/9£614

Tue 6/1019:10 -

2 stops24h 15m

Wed 14/1012:10 -

2 stops15h 15m

Deal found 8/9£846

Tue 24/1107:45 -

3 stops37h 41m

Sun 29/1116:05 -

3 stops19h 30m

Deal found 8/9£954

Mon 5/1021:50 -

3 stops26h 51m

Mon 12/1012:10 -

2 stops16h 50m

Deal found 7/9£1,055

Mon 12/1021:50 -

3 stops26h 51m

Tue 20/1008:55 -

3 stops20h 05m

Deal found 6/9£1,069

Mon 12/1021:20 -

3 stops29h 00m

Sat 17/1014:40 -

2 stops17h 00m

Deal found 5/9£1,120

Fri 2/1019:55 -

3 stops28h 46m

Fri 16/1012:10 -

2 stops19h 45m

Deal found 7/9£1,225

Mon 19/1007:00 -

2 stops19h 20m

Mon 26/1016:05 -

2 stops25h 00m

Deal found 4/9£1,292

Fri 25/919:55 -

3 stops28h 46m

Fri 2/1017:18 -

2 stops14h 42m

Deal found 7/9£1,300

Fri 2/1007:00 -

2 stops17h 41m

Fri 9/1015:30 -

2 stops26h 40m

Deal found 4/9£1,752

Find flight deals from Luton to Illinois

Round-trip from	£524
One-way from	£346
Popular in	August
Cheapest in	February
Average price	£588

6/10-13/10
2 total stops
23h 35m total
London to Illinois

Search Deals

15/1-31/12
3 total stops
28h 50m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£63 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

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

Fri 29/1

21:30-14:55

1 stop23h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£385

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 14/9

18:05-16:00

2 stops51h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£394

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 22/11

07:45-14:55

1 stop37h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£394

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 1/1

06:00-17:20

1 stop17h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£407

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 15/1

15:55-17:20

1 stop31h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£407

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 16/1

07:00-17:20

1 stop16h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£407

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 4/1

15:35-17:20

1 stop31h 45m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£408

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 12/12

07:00-17:20

1 stop16h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£408

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 18/1

15:35-17:20

1 stop31h 45m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£410

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 3/10

07:45-09:40

3 stops55h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£417

Flights are sorted by cheapest return flights first.

Deals found on 4/9

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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Gatwick to Dallas/Fort Worth flights

Gatwick to Boston flights

Gatwick to Dulles Intl flights

Gatwick to Las Vegas flights

Luton to Orlando flights

Gatwick to Fort Lauderdale flights

London City to Dulles Intl flights

Stansted to Dulles Intl flights

London City to Boston flights

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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 retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/1. 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 9 September 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 9 September 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 9 September 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 9 September 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 9 September 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 9 September 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 9 September 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 9 September 2026.

Find flight deals from Luton to Illinois

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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

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Luton and Illinois flights

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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 9 September 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 9 September 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 9 September 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 9 September 2026.