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.

£351+ 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 19 August 2026.

Fri 4/906:20 -

1 stop18h 55m

Tue 8/915:45 -

1 stop17h 45m

Deal found 19/8£469

Thu 1/1013:35 -

2 stops32h 25m

Wed 7/1018:00 -

2 stops19h 00m

Deal found 16/8£471

Mon 21/914:25 -

3 stops31h 45m

Mon 5/1019:15 -

2 stops21h 35m

Deal found 18/8£473

Tue 29/913:10 -

1 stop12h 05m

Tue 6/1015:45 -

1 stop15h 40m

Deal found 15/8£474

Tue 15/909:40 -

1 stop15h 35m

Tue 22/915:45 -

1 stop15h 40m

Deal found 18/8£474

Wed 9/913:50 -

1 stop11h 25m

Tue 22/921:00 -

1 stop10h 25m

Deal found 18/8£476

Thu 15/1013:00 -

1 stop12h 15m

Mon 19/1015:45 -

1 stop15h 00m

Deal found 19/8£477

Wed 23/906:15 -

1 stop13h 45m

Tue 6/1015:45 -

1 stop15h 40m

Deal found 18/8£480

Sat 3/1005:40 -

3 stops20h 40m

Sat 10/1012:10 -

2 stops19h 30m

Deal found 19/8£799

Fri 4/906:20 -

3 stops37h 42m

Fri 18/912:10 -

3 stops23h 55m

Deal found 16/8£954

Thu 1/1019:55 -

2 stops24h 05m

Thu 8/1012:10 -

3 stops18h 15m

Deal found 16/8£961

Sat 17/1006:05 -

2 stops18h 36m

Sat 31/1016:05 -

3 stops25h 20m

Deal found 17/8£1,005

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 19 August 2026.

Wed 14/1013:50 -

1 stop11h 25m

Fri 16/1021:00 -

1 stop11h 00m

Deal found 18/8£481

Mon 28/908:15 -

1 stop11h 45m

Mon 5/1015:45 -

1 stop15h 00m

Deal found 14/8£487

Wed 11/1121:45 -

2 stops25h 35m

Mon 23/1120:10 -

1 stop15h 50m

Deal found 18/8£499

Wed 9/913:50 -

1 stop11h 25m

Wed 16/915:45 -

1 stop11h 15m

Deal found 18/8£513

Thu 12/1108:20 -

2 stops15h 00m

Mon 23/1120:10 -

1 stop15h 50m

Deal found 18/8£519

Tue 20/1010:50 -

2 stops37h 00m

Wed 28/1016:55 -

1 stop11h 20m

Deal found 15/8£531

Wed 7/1006:10 -

2 stops21h 15m

Wed 14/1022:25 -

2 stops18h 10m

Deal found 17/8£534

Thu 17/1212:15 -

2 stops33h 15m

Thu 24/1218:30 -

2 stops20h 35m

Deal found 18/8£577

Fri 20/1106:00 -

1 stop17h 20m

Sun 29/1118:30 -

1 stop14h 35m

Deal found 18/8£585

Sat 19/906:00 -

2 stops19h 15m

Sat 26/915:45 -

2 stops13h 20m

Deal found 17/8£621

Tue 1/913:10 -

1 stop12h 05m

Tue 8/915:45 -

1 stop15h 40m

Deal found 14/8£625

Sat 3/1005:40 -

3 stops20h 40m

Sat 10/1012:10 -

2 stops19h 30m

Deal found 19/8£799

Thu 1/1019:55 -

2 stops24h 05m

Thu 8/1012:10 -

3 stops18h 15m

Deal found 16/8£961

Sat 17/1006:05 -

2 stops18h 36m

Sat 31/1016:05 -

3 stops25h 20m

Deal found 17/8£1,005

Wed 2/919:55 -

3 stops28h 47m

Wed 23/912:10 -

2 stops15h 15m

Deal found 15/8£1,043

Fri 4/921:50 -

3 stops26h 52m

Fri 18/908:55 -

3 stops18h 30m

Deal found 16/8£1,140

Mon 14/919:50 -

2 stops24h 10m

Sat 19/914:40 -

2 stops22h 15m

Deal found 17/8£1,181

Wed 9/915:15 -

3 stops33h 26m

Fri 11/908:55 -

3 stops26h 30m

Deal found 16/8£1,181

Find flight deals from Luton to Illinois

Round-trip from	£469
One-way from	£351
Popular in	July
Cheapest in	February
Average price	£703

4/9-8/9
2 total stops
36h 40m total
London to Illinois

Search Deals

1/9
3 total stops
48h 00m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£83 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

Fastest return journey

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 14/10

13:50-19:15

1 stop11h 25m

Chicago O'Hare Intl

Fri 16/10

21:00-14:00

1 stop11h 00m

£481

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 28/9

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Mon 5/10

15:45-12:45

1 stop15h 00m

£487

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 11/11

21:45-17:20

2 stops25h 35m

Chicago O'Hare Intl

Mon 23/11

20:10-18:00

1 stop15h 50m

£499

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 9/9

13:50-19:15

1 stop11h 25m

Chicago O'Hare Intl

Wed 16/9

15:45-09:00

1 stop11h 15m

£513

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 12/11

08:20-17:20

2 stops15h 00m

Chicago O'Hare Intl

Mon 23/11

20:10-18:00

1 stop15h 50m

£519

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Tue 20/10

10:50-17:50

2 stops37h 00m

Chicago O'Hare Intl

Wed 28/10

16:55-09:15

1 stop11h 20m

£531

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 7/10

06:10-21:25

2 stops21h 15m

Chicago O'Hare Intl

Wed 14/10

22:25-22:35

2 stops18h 10m

£534

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 17/12

12:15-15:30

2 stops33h 15m

Chicago O'Hare Intl

Thu 24/12

18:30-21:05

2 stops20h 35m

£577

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 20/11

06:00-17:20

1 stop17h 20m

Chicago O'Hare Intl

Sun 29/11

18:30-15:05

1 stop14h 35m

£585

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 19/9

06:00-19:15

2 stops19h 15m

Chicago O'Hare Intl

Sat 26/9

15:45-11:05

2 stops13h 20m

£621

Flights are sorted by cheapest return flights first.

Deals found on 18/8

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-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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London City to Boston flights

Gatwick to Las Vegas flights

Gatwick to Dallas/Fort Worth flights

Gatwick to Dulles Intl flights

Heathrow to Reagan-National flights

Luton to Los Angeles flights

Heathrow to Austin flights

Heathrow to Sky Harbor Intl flights

Gatwick to San Francisco flights

Stansted to Dulles Intl 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 £351

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 1/9. 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 19 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 19 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 19 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 19 August 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 19 August 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 19 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 19 August 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 19 August 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

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 19 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 19 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 19 August 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 19 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 19 August 2026.