£407+ Cheap flights to Illinois

— ORD
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Illinois

Thu 19/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£518
Mon 23/1119:30 -
2 stops27h 50m
Mon 7/1218:30 -
2 stops21h 15m
Deal found 25/10£519
Thu 3/1206:40 -
1 stop16h 05m
Sat 16/119:10 -
1 stop32h 10m
Deal found 26/10£519
Thu 5/1116:00 -
1 stop29h 30m
Fri 4/1220:10 -
2 stops30h 10m
Deal found 27/10£520
Mon 23/1111:00 -
Nonstop8h 45m
Fri 27/1117:10 -
Nonstop7h 45m
Deal found 25/10£520
Thu 19/1106:40 -
1 stop16h 05m
Thu 3/1219:10 -
1 stop14h 50m
Deal found 25/10£521
Fri 4/1207:00 -
2 stops16h 20m
Sun 6/1218:30 -
2 stops21h 30m
Deal found 28/10£521
Tue 17/1110:20 -
1 stop12h 25m
Thu 3/1219:10 -
1 stop14h 50m
Deal found 25/10£522
Tue 24/1107:45 -
2 stops15h 35m
Mon 30/1118:30 -
2 stops17h 30m
Deal found 25/10£522
Wed 25/1109:50 -
2 stops19h 28m
Wed 2/1219:00 -
1 stop14h 05m
Deal found 28/10£522
Wed 11/1106:00 -
1 stop15h 30m
Sun 22/1120:10 -
1 stop20h 30m
Deal found 29/10£522
Mon 23/1121:35 -
2 stops47h 55m
Sun 29/1120:10 -
1 stop13h 35m
Deal found 27/10£523

Find flights to Illinois

Explore Illinois

Find flight deals to Illinois

Return from

£518

One-way from

£407

Popular in

August

Cheapest in

February

Average price

£638

Good round-trip deal

£607 or less

Good one-way deal

£507 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 28/1-1/2
  • 3 total stops
  • 32h 35m total
  • London to Chicago
20/11-31/12
  • 20/11-31/12
  • 2 total stops
  • 15h 10m total
  • London to Illinois
Highest demand for flights based on searches. 10% potential increase in price (£77 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Average for return flights in October 2026
Price to beat on a round-trip flight from London to Illinois.
Price to beat on a one-way flight from London to Illinois.

Cheapflights Fare Finder

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

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Fri 25/12

06:00-15:30

1 stop15h 30m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£413

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 21/11

07:35-17:20

2 stops15h 45m

Chicago O'Hare Intl

Sat 28/11

18:30-22:40

2 stops22h 10m

£532

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 18/2

07:00-17:20

2 stops16h 20m

Chicago O'Hare Intl

Tue 23/2

18:30-22:00

2 stops21h 30m

£539

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Tue 12/1

07:00-17:20

2 stops16h 20m

Chicago O'Hare Intl

Fri 15/1

18:30-20:25

2 stops19h 55m

£546

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sat 21/11

07:20-17:20

2 stops16h 00m

Chicago O'Hare Intl

Mon 30/11

18:30-14:10

2 stops13h 40m

£563

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 18/11

07:30-18:20

1 stop16h 50m

Chicago O'Hare Intl

Sun 22/11

15:55-15:10

1 stop17h 15m

£570

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Fri 20/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Fri 11/12

19:10-16:00

1 stop14h 50m

£582

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Sat 21/11

15:35-16:45

2 stops31h 10m

Chicago O'Hare Intl

Sat 28/11

19:10-17:00

2 stops15h 50m

£591

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Sun 22/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sat 28/11

19:10-21:20

2 stops20h 10m

£595

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Wed 2/12

19:30-16:45

1 stop27h 15m

Chicago O'Hare Intl

Tue 8/12

10:38-18:30

2 stops25h 52m

£597

Flights are sorted by cheapest return flights first.

Deals found on 25/10

Showing 1-10 of 33 resultsSorted by cheapest first
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Best time to book a flight to Illinois

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

Cheapflights Insights

Everything you need to know about your flight to Illinois

How long is the flight to Illinois?

On average, a flight from London to Illinois takes 12 hours 4 minutes. Flights to Illinois from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from London to Illinois are Virgin Atlantic, Icelandair and Scandinavian Airlines.

Rainfall in Illinois by month

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.

Temperature in Illinois by month

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).

When is the best time to book a flight to Illinois?

The best time to book flights to Illinois is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

See what other customers who have flown with Aer Lingus,United Airlines, andIcelandair to the United States have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Entertainment

7.1

Comfort

7.2

Crew

8.1

Boarding

7.5

Food

6.7

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

FAQs about flying to Illinois

Illinois climate

Illinois’s winters are very cold and long with snow and icy winds from late November through to April. Summers, especially July and August, the weather tends to be hot and humid. The best times to visit is when the weather is perfect, in spring and autumn; tornado season can occur anytime between the months of March and May. Chicago’s summers are humid with highs of 30 degrees (Celsius) or more and its winters are bitterly cold.

Getting around Illinois

Public transportation is reliable and taxis are easy to find. Driving is not recommended because of heavy traffic and parking is almost impossible to find. The El, a system operated by The Chicago Transit Authority consists of elevated trains running 24 hours a day. During the summer rush hour a River Bus is available.

What is good to know if travelling to Illinois?

  • Chicago has a wealth of things to see and do. The best view of the city can be found at 1,450 feet from the top of North America’s tallest building – the Sears Tower. Head to the 103rd floor to the Skydeck where you can see the entire city laid out.  The Hancock Building is also well worth a visit and offers stunning city views from its observation deck or cocktail bar.
  • Don’t miss a trip to the Anderson Japanese Gardens in Rockford. Set on twelve acres the gardens are adorned with Japanese maples, magnolias, and rhododendrons and have several ponds and waterfalls with Japanese bronze structures surrounding them. There’s also an authentic tea house and contemporary “Garden of Reflection”.  
  • Visit the preserved Frank Lloyd Wright Museum on Chicago Avenue in Oak Park where the famed architect spent 20 years of his career and designed 130 of his masterpieces.  Wright lived here until 1909.
  • One of the most visited attractions in Chicago is the Art Institute of Chicago. Art lovers – well any visitor – shouldn’t miss a trip to the museum, it’s remarkable. The gargantuan building houses more than 250,000 works of art from all over the world including ancient Egyptian, Japanese, Korean, Greek and Roman relics. One of its highlights is the anthology of Impressionist art which has an impressive collection by Monet, Pablo Picasso and Henri Matisse to name a few.
  • Anyone interested in the lives of the Amish people should head to central Illinois where a welcoming group of Amish villages are set up. Take a tour of the community in the Illinois Amish Interpretative Centre in Arcola, visit a working farm and watch how supper is prepared and enjoyed in a family home.
  • When is the best time to fly to Illinois?

    Peak Season: Winter is peak season in Illinois for skiing and snowmobiling. In summer many different festivals take place in Chicago’s parks and neighbourhoods almost every weekend, making it difficult to find a cheap Illinois flight. Off Season: The best month to book a cheap Illinois flight is September, which is also the mildest month. Autumn is visually the prettiest time to visit when the temperature is still mild and the foliage is changing. The quietest months in Chicago are from January to March but they can also be the coldest and windiest.

  • Can I find cheaper flights to Illinois if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Illinois?

    Based on reviews from Cheapflights users, Aer Lingus is rated the highest out of the airlines that fly to Illinois.

  • What is the cheapest airport to fly to in Illinois?

    Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost £105, while return flights cost around £87.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around £87, however they can be found for as little as £87.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, London offers the quickest one-way flight (8 hours 45 minutes).

  • Which airport is closest to Aragon Ballroom?

    f being close to Aragon Ballroom is important to you, you’ll want to land at Chicago O'Hare Intl Airport.

  • Does Chicago O'Hare Intl have car hire?

    Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Chicago O'Hare Intl?

    Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 mi away from Chicago O'Hare Intl).

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

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