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

Currently, January is the cheapest month in which you can book a flight from London Stansted Airport to Illinois (average of £595). Flying from London Stansted Airport to Illinois in July is currently the most expensive (average of £843). 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 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).

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

Find a great deal and save up to 31% by booking at least 56 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London Stansted Airport to Illinois within the next two weeks, with the cheapest ticket starting at £491.

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

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Illinois. Flights to Illinois from London Stansted Airport in February are about £515 on average during February, but can be found for as low as £316.

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

When flying from London Stansted Airport to Illinois, 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 Stansted to Illinois that include hotel bookings?

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

How can I find direct flights from Stansted to Illinois?

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

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

Yes. Cheapflights offers flight deals from Stansted 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.

£414+ Cheap Flights from London Stansted Airport to Illinois

Cheap flight deals from Stansted to Illinois

Round-trip from	£435
One-way from	£414
Popular in	July
Cheapest in	February
Average price	£623

4/9-8/9
2 total stops
26h 10m total
London to Illinois

Search Deals

27/9
3 total stops
42h 03m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (£61 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 2025

Search Deals

Find flight deals from Stansted to Illinois

Cheapest flights from Stansted to Illinois
Explore the most affordable flight options available from Stansted to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

Thu 4/906:55STN - ORD

1 stop13h 05mMultiple Airlines

Mon 8/915:45ORD - STN

1 stop13h 05mMultiple Airlines

Deal found 18/8£435

Sat 27/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 5/1021:15ORD - STN

1 stop18h 00mMultiple Airlines

Deal found 18/8£438

Wed 24/908:15STN - ORD

1 stop11h 45mMultiple Airlines

Wed 1/1015:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£439

Tue 16/914:45STN - ORD

2 stops31h 10mMultiple Airlines

Tue 23/919:05ORD - STN

2 stops20h 10mMultiple Airlines

Deal found 19/8£440

Thu 16/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Mon 20/1021:15ORD - STN

1 stop11h 05mMultiple Airlines

Deal found 17/8£443

Sun 5/1009:45STN - ORD

1 stop15h 15mMultiple Airlines

Sun 12/1015:45ORD - STN

1 stop12h 50mMultiple Airlines

Deal found 18/8£444

Sat 13/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 14/915:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£446

Thu 2/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Sun 5/1015:45ORD - STN

1 stop11h 45mMultiple Airlines

Deal found 18/8£447

Thu 2/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Thu 9/1015:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 18/8£448

Sat 11/1016:30STN - ORD

3 stops29h 40mMultiple Airlines

Sat 18/1019:15ORD - STN

2 stops23h 05mMultiple Airlines

Deal found 19/8£451

Wed 1/1007:05STN - ORD

2 stops20h 10mMultiple Airlines

Wed 8/1019:25ORD - STN

2 stops18h 25mMultiple Airlines

Deal found 17/8£460

Wed 1/1020:00STN - ORD

2 stops22h 35mMultiple Airlines

Sun 5/1018:00ORD - STN

2 stops23h 20mMultiple Airlines

Deal found 19/8£461

Best flights from Stansted to Illinois
Discover carefully curated flight deals from Stansted to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 August 2025.

Thu 4/906:55STN - ORD

1 stop13h 05mMultiple Airlines

Mon 8/915:45ORD - STN

1 stop13h 05mMultiple Airlines

Deal found 18/8£435

Sat 27/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 5/1021:15ORD - STN

1 stop18h 00mMultiple Airlines

Deal found 18/8£438

Wed 24/908:15STN - ORD

1 stop11h 45mMultiple Airlines

Wed 1/1015:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£439

Tue 16/914:45STN - ORD

2 stops31h 10mMultiple Airlines

Tue 23/919:05ORD - STN

2 stops20h 10mMultiple Airlines

Deal found 19/8£440

Thu 16/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Mon 20/1021:15ORD - STN

1 stop11h 05mMultiple Airlines

Deal found 17/8£443

Sun 5/1009:45STN - ORD

1 stop15h 15mMultiple Airlines

Sun 12/1015:45ORD - STN

1 stop12h 50mMultiple Airlines

Deal found 18/8£444

Sat 13/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 14/915:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£446

Mon 3/1106:30STN - ORD

1 stop13h 30mMultiple Airlines

Sun 9/1115:50ORD - STN

1 stop10h 00mMultiple Airlines

Deal found 18/8£447

Thu 2/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Sun 5/1015:45ORD - STN

1 stop11h 45mMultiple Airlines

Deal found 18/8£447

Thu 2/1013:10STN - ORD

1 stop11h 50mMultiple Airlines

Thu 9/1015:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 18/8£448

Sat 11/1016:30STN - ORD

3 stops29h 40mMultiple Airlines

Sat 18/1019:15ORD - STN

2 stops23h 05mMultiple Airlines

Deal found 19/8£451

Wed 1/1007:05STN - ORD

2 stops20h 10mMultiple Airlines

Wed 8/1019:25ORD - STN

2 stops18h 25mMultiple Airlines

Deal found 17/8£460

Last-minute flights from Stansted to Illinois
Discover last-minute flight deals from Stansted to Illinois. Data last updated 19 August 2025 and is based on user searches.

Thu 28/806:55STN - ORD

1 stop18h 05mMultiple Airlines

Thu 4/915:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£492

Fri 29/806:40STN - ORD

1 stop18h 20mMultiple Airlines

Fri 5/921:15ORD - STN

1 stop16h 35mMultiple Airlines

Deal found 17/8£485

Sat 30/806:35STN - ORD

2 stops20h 40mMultiple Airlines

Tue 2/919:25ORD - STN

2 stops21h 30mMultiple Airlines

Deal found 18/8£471

Thu 4/906:55STN - ORD

1 stop13h 05mMultiple Airlines

Mon 8/915:45ORD - STN

1 stop13h 05mMultiple Airlines

Deal found 18/8£435

Thu 11/917:50STN - ORD

2 stops28h 20mMultiple Airlines

Wed 17/905:05ORD - STN

3 stops23h 35mMultiple Airlines

Deal found 18/8£497

Sat 13/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 14/915:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£446

Tue 16/914:45STN - ORD

2 stops31h 10mMultiple Airlines

Tue 23/919:05ORD - STN

2 stops20h 10mMultiple Airlines

Deal found 19/8£440

Wed 17/913:55STN - ORD

2 stops27h 00mMultiple Airlines

Wed 8/1019:50ORD - STN

2 stops19h 35mMultiple Airlines

Deal found 18/8£473

Thu 18/907:35STN - ORD

2 stops18h 20mMultiple Airlines

Tue 30/919:05ORD - STN

2 stops21h 45mMultiple Airlines

Deal found 18/8£465

Wed 24/908:15STN - ORD

1 stop11h 45mMultiple Airlines

Wed 1/1015:45ORD - STN

1 stop10h 05mMultiple Airlines

Deal found 17/8£439

Sat 27/906:35STN - ORD

1 stop13h 25mMultiple Airlines

Sun 5/1021:15ORD - STN

1 stop18h 00mMultiple Airlines

Deal found 18/8£438

Tue 30/912:15STN - ORD

2 stops33h 55mMultiple Airlines

Fri 3/1018:00ORD - STN

2 stops21h 05mMultiple Airlines

Deal found 18/8£463

One-way flights from Stansted to Illinois
Search for one-way flight options from Stansted to Illinois. Find affordable one-way fares based on user searches. Data last updated 19 August 2025.

Sat 27/921:15STN - ORD

3 stops42h 03mMultiple Airlines

Deal found 18/8£414

Fri 26/1208:20STN - ORD

1 stop14h 25mMultiple Airlines

Deal found 18/8£416

Mon 20/1007:55STN - ORD

2 stops31h 45mMultiple Airlines

Deal found 19/8£417

Sun 7/915:30STN - ORD

1 stop28h 30mMultiple Airlines

Deal found 17/8£420

Sun 24/821:40STN - ORD

3 stops38h 00mMultiple Airlines

Deal found 18/8£422

Tue 7/1006:30STN - ORD

2 stops19h 10mMultiple Airlines

Deal found 18/8£423

Sun 14/908:15STN - ORD

2 stops16h 00mMultiple Airlines

Deal found 16/8£424

Mon 29/1207:35STN - ORD

1 stop15h 10mMultiple Airlines

Deal found 18/8£428

Fri 12/1208:20STN - ORD

1 stop14h 25mMultiple Airlines

Deal found 19/8£433

Wed 31/1206:30STN - ORD

2 stops16h 50mMultiple Airlines

Deal found 19/8£434

Mon 15/907:15STN - ORD

2 stops20h 45mMultiple Airlines

Deal found 17/8£435

Mon 27/1010:55STN - STL

2 stops27h 12mMultiple Airlines

Deal found 18/8£615

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 4/9

06:55-14:00

1 stop13h 05m

Chicago O'Hare Intl

Mon 8/9

15:45-10:50

1 stop13h 05m

£435

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 27/9

06:35-14:00

1 stop13h 25m

Chicago O'Hare Intl

Sun 5/10

21:15-21:15

1 stop18h 00m

£438

LondonChicago

STN - ORD

STNORD

London Stansted

Wed 24/9

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Wed 1/10

15:45-07:50

1 stop10h 05m

£439

LondonChicago

STN - ORD

STNORD

London Stansted

Tue 16/9

14:45-15:55

2 stops31h 10m

Chicago O'Hare Intl

Tue 23/9

19:05-21:15

2 stops20h 10m

£440

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 16/10

13:10-19:00

1 stop11h 50m

Chicago O'Hare Intl

Mon 20/10

21:15-14:20

1 stop11h 05m

£443

LondonChicago

STN - ORD

STNORD

London Stansted

Sun 5/10

09:45-19:00

1 stop15h 15m

Chicago O'Hare Intl

Sun 12/10

15:45-10:35

1 stop12h 50m

£444

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 13/9

06:35-14:00

1 stop13h 25m

Chicago O'Hare Intl

Sun 14/9

15:45-07:50

1 stop10h 05m

£446

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 3/11

06:30-14:00

1 stop13h 30m

Chicago O'Hare Intl

Sun 9/11

15:50-07:50

1 stop10h 00m

£447

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 2/10

13:10-19:00

1 stop11h 50m

Chicago O'Hare Intl

Sun 5/10

15:45-09:30

1 stop11h 45m

£447

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 2/10

13:10-19:00

1 stop11h 50m

Chicago O'Hare Intl

Thu 9/10

15:45-07:50

1 stop10h 05m

£448

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 26 results

Best time to book a flight from Stansted to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Stansted 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 London Stansted Airport to Illinois

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 Stansted to Illinois that include hotel bookings?
Yes. In addition to deals on Stansted to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Stansted to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Illinois.
Can I find deals for business class flights from Stansted to Illinois?
Yes. Cheapflights offers flight deals from Stansted 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.
What is the cheapest month to book a flight from London Stansted Airport to Illinois?
Currently, January is the cheapest month in which you can book a flight from London Stansted Airport to Illinois (average of £595). Flying from London Stansted Airport to Illinois in July is currently the most expensive (average of £843). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Stansted to Illinois

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Gatwick to Dulles Intl flights

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Heathrow to Midway flights

Complete your trip

Illinois car hire

Chicago O'Hare Intl Airport car hire

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Direct flights to United States

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Millions of users choose and trust Cheapflights to book the best flight deals from Stansted to Illinois for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Illinois from Stansted shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

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Cheap flights from London Stansted Airport to Illinois from £414

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 27/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Stansted to Illinois

Keep the following information in mind while searching for Stansted to Illinois flight deals. Data was last updated 19 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Stansted to Illinois

Cheapest flights from Stansted to IllinoisExplore the most affordable flight options available from Stansted to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

Explore the most affordable flight options available from Stansted to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Stansted to Illinois

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

Cheapflights Insights

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

Related info for your journey

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

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

How can I find direct flights from Stansted to Illinois?

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

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

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

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Cheapest flights from Stansted to Illinois
Explore the most affordable flight options available from Stansted to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 August 2025.