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.

£358+ 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 30 September 2026.

Thu 15/1009:25 -

1 stop15h 50m

Mon 19/1021:00 -

1 stop12h 45m

Deal found 29/9£534

Thu 3/1221:30 -

1 stop23h 25m

Mon 7/1217:40 -

1 stop21h 10m

Deal found 29/9£534

Fri 9/1006:20 -

1 stop18h 55m

Mon 12/1015:45 -

1 stop15h 00m

Deal found 29/9£535

Thu 12/1106:15 -

1 stop13h 55m

Thu 19/1115:55 -

1 stop18h 00m

Deal found 28/9£538

Thu 19/1107:00 -

2 stops16h 20m

Sun 29/1118:30 -

2 stops21h 25m

Deal found 26/9£540

Wed 21/1021:20 -

2 stops24h 50m

Sun 25/1020:10 -

2 stops19h 55m

Deal found 29/9£541

Mon 19/1008:15 -

1 stop11h 45m

Sun 25/1016:55 -

1 stop11h 15m

Deal found 29/9£546

Tue 27/1007:45 -

1 stop12h 25m

Tue 27/1021:05 -

1 stop17h 55m

Deal found 26/9£548

Wed 14/1013:50 -

1 stop11h 25m

Mon 19/1015:45 -

1 stop15h 00m

Deal found 29/9£549

Fri 25/1221:45 -

2 stops25h 35m

Sun 3/118:30 -

2 stops20h 35m

Deal found 29/9£550

Find flight deals from Luton to Illinois

Round-trip from	£534
One-way from	£358
Popular in	August
Cheapest in	February
Average price	£628

15/10-19/10
2 total stops
28h 35m total
London to Illinois

Search Deals

26/11-31/12
3 total stops
34h 15m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£65 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

Wed 27/1

21:30-14:55

1 stop23h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£358

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 25/11

15:05-14:55

3 stops29h 50m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£359

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 15/2

06:10-17:20

2 stops17h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£372

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 28/1

07:45-14:55

1 stop37h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£375

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 14/1

06:15-19:15

1 stop19h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£376

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 26/3

20:00-18:50

3 stops27h 50m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£376

Fastest return journey

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 14/12

06:10-14:10

1 stop14h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£379

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 15/1

21:30-14:55

1 stop23h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£380

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 29/11

11:40-17:20

3 stops35h 40m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£381

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 21/10

09:40-12:40

2 stops33h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£388

Flights are sorted by cheapest return flights first.

Deals found on 29/9

Showing 1-10 of 28 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-MDW

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-MDW

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

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Alternative routes for Luton to Illinois

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Heathrow to Sky Harbor Intl flights

Gatwick to Las Vegas 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 £358

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/1. 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 30 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 30 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 30 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 30 September 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 30 September 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 30 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 30 September 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 30 September 2026.

Find flight deals from Luton to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

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 30 September 2026.

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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 30 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 30 September 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 30 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 30 September 2026.