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.

£255+ 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 26 August 2026.

Sun 20/909:00 -

1 stop16h 15m

Sun 27/915:45 -

1 stop13h 40m

Deal found 23/8£469

Fri 11/906:20 -

1 stop18h 55m

Fri 18/915:45 -

1 stop19h 40m

Deal found 22/8£474

Thu 3/909:25 -

2 stops14h 50m

Mon 7/919:25 -

2 stops21h 25m

Deal found 22/8£474

Thu 17/913:00 -

1 stop12h 15m

Mon 21/915:45 -

1 stop11h 30m

Deal found 23/8£477

Wed 16/906:15 -

1 stop13h 45m

Wed 23/915:45 -

1 stop11h 15m

Deal found 24/8£477

Wed 21/1006:15 -

1 stop13h 45m

Wed 28/1016:55 -

1 stop11h 20m

Deal found 23/8£480

Mon 21/912:25 -

2 stops33h 45m

Mon 5/1019:15 -

2 stops21h 35m

Deal found 22/8£480

Wed 14/1011:15 -

2 stops16h 10m

Sun 18/1022:25 -

2 stops18h 30m

Deal found 22/8£483

Mon 12/1019:45 -

2 stops26h 25m

Thu 22/1019:15 -

2 stops17h 50m

Deal found 22/8£485

Sun 20/915:15 -

2 stops28h 10m

Sun 27/912:10 -

3 stops20h 25m

Deal found 21/8£734

Fri 9/1006:05 -

2 stops18h 36m

Fri 16/1012:10 -

2 stops18h 45m

Deal found 25/8£800

Thu 1/1020:20 -

3 stops28h 21m

Sat 10/1012:10 -

3 stops31h 20m

Deal found 21/8£887

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 26 August 2026.

Mon 12/1019:45 -

2 stops26h 25m

Thu 22/1019:15 -

2 stops17h 50m

Deal found 22/8£485

Mon 21/912:25 -

3 stops33h 45m

Mon 5/1019:15 -

2 stops21h 35m

Deal found 22/8£492

Wed 21/1006:15 -

1 stop13h 45m

Thu 29/1021:10 -

1 stop9h 50m

Deal found 23/8£495

Fri 20/1109:00 -

1 stop15h 25m

Sun 29/1115:55 -

1 stop11h 15m

Deal found 22/8£523

Thu 22/1013:00 -

1 stop12h 15m

Sat 24/1016:45 -

1 stop10h 20m

Deal found 22/8£523

Sun 11/1014:25 -

2 stops31h 45m

Sun 18/1019:15 -

2 stops21h 40m

Deal found 26/8£546

Thu 1/1019:45 -

2 stops26h 25m

Tue 13/1019:15 -

2 stops17h 50m

Deal found 23/8£546

Thu 24/915:50 -

3 stops30h 20m

Wed 7/1019:15 -

2 stops20h 00m

Deal found 25/8£549

Sun 1/1106:00 -

1 stop17h 20m

Fri 6/1118:30 -

1 stop13h 25m

Deal found 26/8£551

Thu 5/1106:15 -

2 stops17h 05m

Thu 12/1118:30 -

2 stops15h 20m

Deal found 26/8£582

Wed 14/1007:15 -

2 stops16h 35m

Sat 17/1015:45 -

1 stop10h 35m

Deal found 24/8£587

Sun 20/915:15 -

2 stops28h 10m

Sun 27/912:10 -

3 stops20h 25m

Deal found 21/8£734

Fri 9/1006:05 -

2 stops18h 36m

Fri 16/1012:10 -

2 stops15h 15m

Deal found 25/8£812

Thu 1/1020:20 -

3 stops28h 21m

Sat 10/1012:10 -

3 stops31h 20m

Deal found 21/8£887

Sun 6/921:20 -

2 stops22h 05m

Tue 22/914:40 -

2 stops18h 10m

Deal found 23/8£1,041

Sun 11/1019:55 -

2 stops23h 30m

Mon 19/1012:10 -

2 stops16h 25m

Deal found 26/8£1,060

Sun 6/921:20 -

3 stops27h 22m

Wed 9/914:40 -

2 stops15h 55m

Deal found 23/8£1,150

Sat 10/1019:25 -

3 stops30h 55m

Sat 31/1016:05 -

3 stops22h 40m

Deal found 25/8£1,188

Sun 6/921:20 -

2 stops22h 05m

Fri 11/914:40 -

2 stops21h 45m

Deal found 23/8£1,223

Find flight deals from Luton to Illinois

Round-trip from	£469
One-way from	£255
Popular in	August
Cheapest in	February
Average price	£719

20/9-27/9
2 total stops
29h 55m total
London to Illinois

Search Deals

13/11
3 total stops
40h 14m 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

Mon 12/10

19:45-16:10

2 stops26h 25m

Chicago O'Hare Intl

Thu 22/10

19:15-19:05

2 stops17h 50m

£485

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 21/9

12:25-16:10

3 stops33h 45m

Chicago O'Hare Intl

Mon 5/10

19:15-22:50

2 stops21h 35m

£492

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 21/10

06:15-14:00

1 stop13h 45m

Chicago O'Hare Intl

Thu 29/10

21:10-12:00

1 stop9h 50m

£495

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 20/11

09:00-18:25

1 stop15h 25m

Chicago O'Hare Intl

Sun 29/11

15:55-09:10

1 stop11h 15m

£523

Fastest return journey

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 22/10

13:00-19:15

1 stop12h 15m

Chicago O'Hare Intl

Sat 24/10

16:45-09:05

1 stop10h 20m

£523

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 11/10

14:25-16:10

2 stops31h 45m

Chicago O'Hare Intl

Sun 18/10

19:15-22:55

2 stops21h 40m

£546

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 1/10

19:45-16:10

2 stops26h 25m

Chicago O'Hare Intl

Tue 13/10

19:15-19:05

2 stops17h 50m

£546

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 24/9

15:50-16:10

3 stops30h 20m

Chicago O'Hare Intl

Wed 7/10

19:15-21:15

2 stops20h 00m

£549

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

£551

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 5/11

06:15-17:20

2 stops17h 05m

Chicago O'Hare Intl

Thu 12/11

18:30-15:50

2 stops15h 20m

£582

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 39 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-STL

LTN-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 London Luton Airport to Illinois

LTN-USIL

LTN-STL

LTN-ORD

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 Hobby flights

Gatwick to O'Hare Intl flights

London City to Las Vegas flights

Heathrow to Austin 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 £255

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 13/11. 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 26 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 26 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 26 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 26 August 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 26 August 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 26 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 26 August 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 26 August 2026.

Find flight deals from Luton to Illinois

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Popular in

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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 26 August 2026.

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Luton to 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 26 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 26 August 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 26 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 26 August 2026.