What is the cheapest month to book a flight from Illinois to London Luton Airport?

Currently, January is the cheapest month in which you can book a flight from Illinois to London Luton Airport (average of £76). Flying from Illinois to London Luton Airport in July is currently the most expensive (average of £113). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in London Luton Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Luton Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Luton Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Illinois to London Luton Airport?

The most popular flight routes from Illinois to London Luton Airport are Chicago O'Hare Intl - London Luton, Lambert-St Louis - London Luton and Chicago Midway - London Luton.

How far in advance should I book a flight from Illinois to London Luton Airport?

To save up to 11% on this flight, we recommend booking at least 60 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to London Luton Airport from £517 1-2 weeks out and tickets from £524 for flights departing within the next 72 hours.

What is the cheapest month to fly from Illinois to London Luton Airport?

February is one of the best times of the year to fly to London Luton Airport from Illinois. Prices for February average £562 per person but you can even find prices for as low as £341. The most expensive prices can be found in the month of June. Opting for a February flight can save you 50% on your journey compared to booking in June

What is the cheapest time of day to fly from IL to LTN?

When flying from Illinois to London Luton Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Illinois to Luton that include hotel bookings?

Yes. In addition to deals on Illinois to Luton flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Illinois to Luton?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Luton.

Can I find deals for business class flights from Illinois to Luton?

Yes. Cheapflights offers flight deals from Illinois to Luton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£173+ Flights from Illinois to London Luton Airport

Cheap flight deals from Illinois to Luton

Round-trip from	£373
One-way from	£173
Popular in	June
Cheapest in	February
Average price	£526

3/12-7/12
2 total stops
30h 20m total
Illinois to London

Search Deals

13/9
3 total stops
41h 05m total
Illinois to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£110 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

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Find flight deals from Illinois to Luton

Cheapest flights from Illinois to Luton
Explore the most affordable flight options available from Illinois to Luton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Mon 1/1218:30ORD - LTN

1 stop13h 30mMultiple Airlines

Tue 9/1207:00LTN - ORD

1 stop16h 20mMultiple Airlines

Deal found 15/8£373

Mon 1/1218:30ORD - LTN

1 stop13h 30mMultiple Airlines

Sun 14/1206:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 14/8£375

Tue 11/1118:30ORD - LTN

1 stop13h 55mMultiple Airlines

Sun 16/1106:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 14/8£377

Sun 9/1118:30ORD - LTN

1 stop14h 20mMultiple Airlines

Sun 16/1106:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 13/8£380

Wed 5/1118:30ORD - LTN

1 stop13h 00mMultiple Airlines

Mon 17/1108:00LTN - ORD

1 stop15h 20mMultiple Airlines

Deal found 13/8£381

Thu 18/1218:30ORD - LTN

1 stop22h 10mMultiple Airlines

Wed 24/1207:30LTN - ORD

1 stop15h 50mMultiple Airlines

Deal found 15/8£383

Wed 19/1118:30ORD - LTN

1 stop13h 00mMultiple Airlines

Wed 3/1207:30LTN - ORD

1 stop15h 50mMultiple Airlines

Deal found 13/8£388

Tue 21/1019:15ORD - LTN

2 stops19h 25mMultiple Airlines

Sat 25/1021:20LTN - ORD

2 stops26h 35mMultiple Airlines

Deal found 13/8£400

Mon 6/1019:15ORD - LTN

2 stops19h 25mMultiple Airlines

Sun 19/1021:20LTN - ORD

2 stops24h 50mMultiple Airlines

Deal found 13/8£402

Sat 13/913:30STL - LTN

2 stops13h 45mMultiple Airlines

Sat 20/908:45LTN - STL

2 stops17h 12mMultiple Airlines

Deal found 14/8£765

Sun 28/913:30STL - LTN

2 stops13h 45mMultiple Airlines

Sun 5/1006:05LTN - STL

2 stops19h 52mMultiple Airlines

Deal found 14/8£800

Fri 22/813:30STL - LTN

2 stops20h 15mMultiple Airlines

Tue 26/821:50LTN - STL

2 stops21h 40mMultiple Airlines

Deal found 13/8£968

Best flights from Illinois to Luton
Discover carefully curated flight deals from Illinois to Luton that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 August 2025.

Mon 1/1218:30ORD - LTN

1 stop13h 30mMultiple Airlines

Tue 9/1207:00LTN - ORD

1 stop16h 20mMultiple Airlines

Deal found 15/8£373

Mon 1/1218:30ORD - LTN

1 stop13h 30mMultiple Airlines

Mon 8/1208:00LTN - ORD

1 stop15h 20mMultiple Airlines

Deal found 15/8£373

Wed 3/1218:30ORD - LTN

1 stop13h 00mMultiple Airlines

Sun 7/1206:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 13/8£373

Mon 1/1218:30ORD - LTN

1 stop13h 30mMultiple Airlines

Sun 14/1206:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 14/8£375

Tue 2/1218:30ORD - LTN

1 stop13h 55mMultiple Airlines

Tue 9/1207:00LTN - ORD

1 stop16h 20mMultiple Airlines

Deal found 15/8£375

Tue 11/1118:30ORD - LTN

1 stop13h 55mMultiple Airlines

Sun 16/1106:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 14/8£377

Sun 9/1118:30ORD - LTN

1 stop14h 20mMultiple Airlines

Sun 16/1106:00LTN - ORD

1 stop17h 20mMultiple Airlines

Deal found 13/8£380

Wed 5/1118:30ORD - LTN

1 stop13h 00mMultiple Airlines

Mon 17/1108:00LTN - ORD

1 stop15h 20mMultiple Airlines

Deal found 13/8£381

Sat 13/913:30STL - LTN

2 stops13h 45mMultiple Airlines

Sat 20/908:45LTN - STL

2 stops17h 12mMultiple Airlines

Deal found 14/8£765

Sun 28/913:30STL - LTN

2 stops13h 45mMultiple Airlines

Sun 5/1006:05LTN - STL

2 stops19h 52mMultiple Airlines

Deal found 14/8£800

Fri 17/1009:15STL - LTN

3 stops29h 45mMultiple Airlines

Sat 1/1115:25LTN - STL

2 stops28h 30mMultiple Airlines

Deal found 14/8£972

Sat 18/1009:15STL - LTN

3 stops22h 30mMultiple Airlines

Sat 1/1119:20LTN - STL

2 stops24h 35mMultiple Airlines

Deal found 14/8£974

Last-minute flights from Illinois to Luton
Discover last-minute flight deals from Illinois to Luton. Data last updated 15 August 2025 and is based on user searches.

Wed 20/808:40ORD - LTN

2 stops32h 55mMultiple Airlines

Tue 2/912:25LTN - ORD

2 stops33h 30mMultiple Airlines

Deal found 14/8£717

Fri 22/813:30STL - LTN

2 stops20h 15mMultiple Airlines

Tue 26/821:50LTN - STL

2 stops21h 40mMultiple Airlines

Deal found 13/8£968

Fri 22/813:30STL - LTN

3 stops22h 35mMultiple Airlines

Fri 29/806:00LTN - STL

3 stops20h 00mMultiple Airlines

Deal found 14/8£1,555

Sat 23/815:45ORD - LTN

1 stop11h 45mMultiple Airlines

Sat 30/810:45LTN - ORD

1 stop14h 15mMultiple Airlines

Deal found 13/8£779

Sun 24/815:35ORD - LTN

2 stops17h 25mMultiple Airlines

Tue 2/908:30LTN - ORD

2 stops15h 45mMultiple Airlines

Deal found 13/8£684

Sun 24/822:15ORD - LTN

2 stops18h 40mMultiple Airlines

Sat 30/806:05LTN - ORD

2 stops18h 10mMultiple Airlines

Deal found 13/8£749

Sun 24/818:17MDW - LTN

2 stops22h 38mMultiple Airlines

Tue 2/919:05LTN - MDW

3 stops28h 32mMultiple Airlines

Deal found 13/8£1,752

Mon 25/815:45ORD - LTN

2 stops24h 30mMultiple Airlines

Mon 1/906:05LTN - ORD

2 stops18h 55mMultiple Airlines

Deal found 13/8£670

Mon 25/819:25ORD - LTN

2 stops20h 50mMultiple Airlines

Fri 29/806:05LTN - ORD

2 stops21h 10mMultiple Airlines

Deal found 13/8£676

Tue 2/915:45ORD - LTN

1 stop11h 40mMultiple Airlines

Tue 9/913:10LTN - ORD

1 stop11h 50mMultiple Airlines

Deal found 13/8£434

Wed 3/915:45ORD - LTN

1 stop10h 25mMultiple Airlines

Wed 10/910:00LTN - ORD

1 stop15h 00mMultiple Airlines

Deal found 13/8£414

Wed 3/915:45ORD - LTN

1 stop10h 25mMultiple Airlines

Thu 11/908:45LTN - ORD

1 stop11h 15mMultiple Airlines

Deal found 12/8£461

One-way flights from Illinois to Luton
Search for one-way flight options from Illinois to Luton. Find affordable one-way fares based on user searches. Data last updated 15 August 2025.

Sat 13/916:35ORD - LTN

3 stops41h 05mMultiple Airlines

Deal found 14/8£173

Sun 12/1018:00ORD - LTN

3 stops44h 40mMultiple Airlines

Deal found 14/8£177

Wed 5/1119:10ORD - LTN

2 stops19h 45mMultiple Airlines

Deal found 13/8£181

Thu 2/1018:00ORD - LTN

2 stops37h 45mMultiple Airlines

Deal found 14/8£184

Wed 8/1011:13ORD - LTN

3 stops22h 12mMultiple Airlines

Deal found 14/8£191

Mon 20/1017:30ORD - LTN

2 stops46h 40mMultiple Airlines

Deal found 12/8£192

Tue 7/1011:13ORD - LTN

3 stops19h 22mMultiple Airlines

Deal found 14/8£193

Tue 4/1111:08ORD - LTN

3 stops26h 17mMultiple Airlines

Deal found 13/8£194

Mon 6/1009:35MDW - LTN

2 stops24h 25mMultiple Airlines

Deal found 13/8£194

Sun 28/918:00ORD - LTN

2 stops36h 20mMultiple Airlines

Deal found 14/8£197

Mon 22/909:35MDW - LTN

2 stops24h 25mMultiple Airlines

Deal found 13/8£197

Sat 18/1018:15ORD - LTN

2 stops23h 25mMultiple Airlines

Deal found 14/8£198

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to London Luton Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 1/12

18:30-14:00

1 stop13h 30m

London Luton

Tue 9/12

07:00-17:20

1 stop16h 20m

£373

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 1/12

18:30-14:00

1 stop13h 30m

London Luton

Mon 8/12

08:00-17:20

1 stop15h 20m

£373

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 3/12

18:30-13:30

1 stop13h 00m

London Luton

Sun 7/12

06:00-17:20

1 stop17h 20m

£373

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 1/12

18:30-14:00

1 stop13h 30m

London Luton

Sun 14/12

06:00-17:20

1 stop17h 20m

£375

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 2/12

18:30-14:25

1 stop13h 55m

London Luton

Tue 9/12

07:00-17:20

1 stop16h 20m

£375

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 11/11

18:30-14:25

1 stop13h 55m

London Luton

Sun 16/11

06:00-17:20

1 stop17h 20m

£377

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 9/11

18:30-14:50

1 stop14h 20m

London Luton

Sun 16/11

06:00-17:20

1 stop17h 20m

£380

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 5/11

18:30-13:30

1 stop13h 00m

London Luton

Mon 17/11

08:00-17:20

1 stop15h 20m

£381

St. LouisLondon

STL - LTN

STLLTN

Lambert-St Louis

Sat 13/9

13:30-09:15

2 stops13h 45m

London Luton

Sat 20/9

08:45-19:57

2 stops17h 12m

£765

St. LouisLondon

STL - LTN

STLLTN

Lambert-St Louis

Sun 28/9

13:30-09:15

2 stops13h 45m

London Luton

Sun 5/10

06:05-19:57

2 stops19h 52m

£800

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 40 results

Best time to book a flight from Illinois to Luton

Have a flexible travel schedule? Discover the best time to fly to Luton from Illinois with our price prediction graph.

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 Illinois to London Luton Airport

No data available for this route at this time. Please check back soon.

Related info for your journey

What are the most popular routes from Illinois to London Luton Airport?
The most popular flight routes from Illinois to London Luton Airport are Chicago O'Hare Intl - London Luton, Lambert-St Louis - London Luton and Chicago Midway - London Luton.
Can I find deals for flights from Illinois to Luton that include hotel bookings?
Yes. In addition to deals on Illinois to Luton flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Illinois to Luton?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Luton.
Can I find deals for business class flights from Illinois to Luton?
Yes. Cheapflights offers flight deals from Illinois to Luton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Illinois to London Luton Airport?
Currently, January is the cheapest month in which you can book a flight from Illinois to London Luton Airport (average of £76). Flying from Illinois to London Luton Airport in July is currently the most expensive (average of £113). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Milton Keynes

Croydon

Hounslow

Gatwick

Slough

Deal

Luton

Wembley

Crawley

Ilford

Hayes

Ipswich

Southend-on-Sea

Winchester

Folkestone

Eastbourne

Maidstone

Watford

Chichester

Dartford

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

Cheapflights makes it easy to find Illinois to Luton flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Illinois to Luton.

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

Yes! Cheapflights helps users easily find flights from Illinois to Luton with no change fees.

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

Not ready to book yet? You can track prices for flights from Illinois to Luton on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Illinois to London Luton Airport from £173

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Luton

Keep the following information in mind while searching for Illinois to Luton flight deals. Data was last updated 15 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Illinois to Luton

Cheapest flights from Illinois to LutonExplore the most affordable flight options available from Illinois to Luton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Explore the most affordable flight options available from Illinois to Luton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to London Luton Airport that are best for you.

Best time to book a flight from Illinois to Luton

Have a flexible travel schedule? Discover the best time to fly to Luton from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to London Luton Airport

Related info for your journey

Find useful and relevant information for your journey from Illinois to Luton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the most popular routes from Illinois to London Luton Airport?

Can I find deals for flights from Illinois to Luton that include hotel bookings?

How can I find direct flights from Illinois to Luton?

Can I find deals for business class flights from Illinois to Luton?

What is the cheapest month to book a flight from Illinois to London Luton Airport?

Travelling to a place near London Luton Airport?

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Alternative routes for Illinois to Luton

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

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

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

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

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Travel Smart

Cheapest flights from Illinois to Luton
Explore the most affordable flight options available from Illinois to Luton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.