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.

£349+ 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 17 September 2026.

Sat 14/1106:30 -

2 stops17h 50m

Sat 21/1115:55 -

2 stops19h 40m

Deal found 13/9£531

Thu 1/1005:40 -

2 stops19h 35m

Thu 15/1015:45 -

2 stops20h 20m

Deal found 13/9£532

Mon 2/1106:15 -

1 stop14h 40m

Mon 16/1117:40 -

1 stop14h 05m

Deal found 12/9£532

Sat 21/1108:20 -

2 stops15h 00m

Mon 30/1118:30 -

2 stops13h 40m

Deal found 13/9£535

Thu 19/1108:20 -

2 stops15h 00m

Mon 30/1118:30 -

2 stops13h 40m

Deal found 13/9£535

Thu 3/1221:30 -

1 stop23h 25m

Mon 7/1217:40 -

1 stop21h 10m

Deal found 12/9£538

Fri 9/1008:00 -

2 stops36h 00m

Sat 17/1015:45 -

2 stops16h 20m

Deal found 16/9£540

Mon 26/1006:10 -

1 stop14h 00m

Sat 31/1016:55 -

1 stop10h 10m

Deal found 16/9£541

Thu 8/1005:40 -

2 stops19h 35m

Mon 12/1015:45 -

2 stops16h 35m

Deal found 13/9£542

Wed 21/1021:20 -

2 stops24h 50m

Sun 25/1020:15 -

2 stops19h 50m

Deal found 14/9£543

Wed 14/1017:50 -

3 stops30h 51m

Wed 21/1015:30 -

2 stops23h 35m

Deal found 14/9£745

Sat 14/1118:50 -

2 stops24h 55m

Thu 19/1116:05 -

3 stops22h 20m

Deal found 13/9£1,023

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 17 September 2026.

Thu 19/1108:20 -

2 stops15h 00m

Mon 30/1118:30 -

2 stops13h 40m

Deal found 13/9£535

Fri 20/1115:55 -

1 stop31h 25m

Fri 27/1118:30 -

1 stop13h 25m

Deal found 12/9£558

Sat 31/1007:20 -

1 stop14h 55m

Sat 7/1116:25 -

2 stops18h 30m

Deal found 16/9£632

Wed 30/908:00 -

2 stops17h 48m

Sun 4/1010:40 -

3 stops21h 25m

Deal found 15/9£633

Sat 5/1208:20 -

2 stops15h 00m

Tue 15/1215:55 -

1 stop12h 40m

Deal found 12/9£638

Fri 20/1121:30 -

2 stops22h 40m

Mon 30/1117:40 -

1 stop14h 05m

Deal found 13/9£652

Wed 14/1009:40 -

2 stops17h 45m

Wed 21/1015:45 -

1 stop11h 15m

Deal found 16/9£672

Tue 13/1014:45 -

2 stops36h 40m

Tue 20/1015:45 -

1 stop11h 30m

Deal found 13/9£675

Sat 21/1121:30 -

1 stop23h 25m

Wed 2/1217:40 -

1 stop13h 15m

Deal found 14/9£703

Thu 24/912:45 -

2 stops22h 30m

Thu 1/1019:25 -

2 stops19h 05m

Deal found 16/9£716

Mon 21/918:05 -

2 stops25h 55m

Fri 25/915:45 -

2 stops20h 20m

Deal found 13/9£725

Sat 14/1118:50 -

2 stops24h 55m

Thu 19/1116:05 -

3 stops22h 20m

Deal found 13/9£1,023

Fri 23/1006:20 -

2 stops22h 53m

Sun 1/1116:05 -

2 stops16h 10m

Deal found 16/9£1,095

Thu 29/1018:45 -

2 stops25h 00m

Thu 5/1116:05 -

2 stops21h 50m

Deal found 14/9£1,127

Wed 14/1021:50 -

3 stops26h 51m

Wed 18/1116:05 -

3 stops19h 30m

Deal found 14/9£1,146

Wed 23/921:50 -

3 stops26h 51m

Wed 30/912:10 -

2 stops16h 50m

Deal found 12/9£1,153

Wed 30/919:55 -

3 stops28h 46m

Mon 5/1012:10 -

2 stops16h 50m

Deal found 16/9£1,228

Thu 24/921:50 -

2 stops21h 35m

Sun 27/914:40 -

2 stops16h 45m

Deal found 14/9£1,316

Fri 2/1007:00 -

2 stops17h 41m

Fri 16/1014:40 -

2 stops22h 00m

Deal found 12/9£1,378

Sat 26/907:35 -

2 stops18h 45m

Sun 22/1116:05 -

2 stops15h 40m

Deal found 11/9£1,426

Wed 14/1007:00 -

2 stops19h 20m

Wed 21/1012:10 -

2 stops24h 20m

Deal found 15/9£1,545

Find flight deals from Luton to Illinois

Round-trip from	£531
One-way from	£349
Popular in	August
Cheapest in	February
Average price	£606

14/11-21/11
4 total stops
37h 30m total
London to Illinois

Search Deals

1/11-31/12
3 total stops
29h 50m 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 21/10

09:40-18:15

3 stops38h 35m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£373

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Fri 11/12

20:05-14:10

1 stop24h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£374

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 19/11

18:05-14:10

1 stop26h 05m

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

Thu 15/10

08:30-18:15

2 stops15h 45m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£379

Fastest return journey

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 5/11

06:15-14:10

1 stop13h 55m

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

Mon 21/9

17:55-16:00

3 stops52h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£386

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 30/9

18:10-12:40

2 stops24h 30m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£390

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 14/10

21:50-18:15

3 stops26h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£393

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 2/11

08:05-17:20

1 stop15h 15m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£418

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 19/10

06:25-17:50

2 stops17h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£424

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 35 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

Heathrow to John F Kennedy Intl flights

Heathrow to Newark flights

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

Stansted to John F Kennedy Intl flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

Luton to John F Kennedy Intl flights

London City to Newark flights

Heathrow to Orlando flights

Stansted to Newark flights

Luton to Newark flights

Heathrow to Miami flights

Gatwick to LaGuardia flights

Heathrow to Los Angeles flights

Gatwick to Orlando flights

Heathrow to Dallas/Fort Worth flights

Heathrow to San Francisco flights

Heathrow to Boston flights

Heathrow to Las Vegas flights

Heathrow to O'Hare Intl flights

Stansted to Orlando flights

Heathrow to Hobby flights

Gatwick to Miami flights

London City to Orlando flights

Heathrow to Dulles Intl flights

London City to Miami flights

Stansted to Miami flights

Heathrow to Seattle flights

London City to Los Angeles flights

Gatwick to Los Angeles flights

Heathrow to Baltimore flights

Heathrow to Atlanta flights

Heathrow to George Bush Intcntl flights

Gatwick to Las Vegas flights

Luton to Orlando flights

Heathrow to Fort Lauderdale flights

Heathrow to Tampa flights

Stansted to Los Angeles flights

Luton to Miami flights

London City to Las Vegas flights

Gatwick to Boston flights

Gatwick to San Francisco flights

London City to San Francisco flights

London City to Boston flights

Gatwick to Fort Lauderdale flights

Gatwick to O'Hare Intl flights

Gatwick to Hobby flights

Stansted to Las Vegas flights

London City to O'Hare Intl 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Luton Airport to Illinois from £349

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. 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 17 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 17 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 17 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 17 September 2026.

Last-minute flights from Luton to IllinoisDiscover last-minute flight deals from Luton to Illinois. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Luton to Illinois. Data last updated 17 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 17 September 2026.

Search for one-way flight options from Luton to Illinois. Find affordable one-way fares based on user searches. Data last updated 17 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 17 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Luton to Illinois flights

Consider these flights travelling from Luton to Illinois.

Fly with Cheapflights

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 17 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 17 September 2026.

Last-minute flights from Luton to Illinois
Discover last-minute flight deals from Luton to Illinois. Data last updated 17 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 17 September 2026.