£348+ Cheap flights to Illinois

— ORD
19 Oct — 26 Oct1
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 29/1006:00 -
1 stop14h 00m
Thu 5/1121:50 -
Nonstop8h 10m
Deal found 14/9£532
Thu 5/1116:00 -
1 stop29h 30m
Wed 11/1119:00 -
2 stops43h 35m
Deal found 13/9£533
Tue 1/1209:00 -
2 stops16h 05m
Thu 10/1213:55 -
1 stop11h 15m
Deal found 14/9£533
Thu 8/1021:25 -
1 stop30h 00m
Sun 18/1019:25 -
1 stop10h 30m
Deal found 14/9£534
Tue 24/1110:25 -
Nonstop9h 20m
Mon 30/1117:45 -
Nonstop8h 10m
Deal found 14/9£535
Wed 23/906:30 -
1 stop13h 30m
Wed 7/1015:45 -
1 stop13h 50m
Deal found 14/9£535
Wed 14/1006:00 -
2 stops19h 48m
Wed 21/1014:00 -
2 stops12h 35m
Deal found 13/9£535
Sun 1/1120:15 -
1 stop28h 10m
Sun 8/1113:30 -
1 stop11h 10m
Deal found 14/9£538
Fri 6/1109:00 -
2 stops16h 58m
Tue 10/1113:55 -
1 stop11h 15m
Deal found 14/9£539
Sat 31/1007:45 -
1 stop12h 25m
Thu 5/1115:55 -
1 stop10h 40m
Deal found 18/9£540
Wed 28/1006:00 -
1 stop14h 00m
Sun 8/1117:45 -
Nonstop8h 10m
Deal found 18/9£540
Sat 31/1006:00 -
1 stop14h 00m
Wed 4/1117:45 -
Nonstop8h 10m
Deal found 17/9£541

Find flights to Illinois

Explore Illinois

Find flight deals to Illinois

Return from

£532

One-way from

£348

Popular in

August

Cheapest in

February

Average price

£609

Good round-trip deal

£611 or less

Good one-way deal

£532 or less
Austrian Airlines
  • Austrian Airlines
  • 29/10-5/11
  • 1 total stop
  • 22h 10m total
  • London to Chicago
16/11-31/12
  • 16/11-31/12
  • 2 total stops
  • 26h 05m total
  • London to Illinois
Highest demand for flights based on searches. 12% potential increase in price (£87 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
Average for return flights in September 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

LondonChicago

SEN London Southend - ORD Chicago O'Hare Intl

SENORD

London Southend

Sun 31/1

07:05-19:15

2 stops18h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£354

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Thu 5/11

16:00-15:30

1 stop29h 30m

Chicago O'Hare Intl

Wed 11/11

19:00-20:35

2 stops43h 35m

£533

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Tue 17/11

09:00-16:15

1 stop13h 15m

Chicago O'Hare Intl

Tue 8/12

17:45-07:55

Nonstop8h 10m

£541

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 26/10

06:10-15:10

1 stop14h 00m

Chicago O'Hare Intl

Sat 31/10

16:55-08:05

1 stop10h 10m

£544

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Wed 7/10

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Tue 13/10

22:30-12:15

Nonstop7h 45m

£551

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Wed 18/11

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Fri 4/12

18:30-10:50

1 stop10h 20m

£559

LondonChicago

LCY London City - ORD Chicago O'Hare Intl

LCYORD

London City

Tue 17/11

06:50-14:10

1 stop13h 20m

Chicago O'Hare Intl

Tue 8/12

20:05-12:40

1 stop10h 35m

£567

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Thu 19/11

10:25-13:45

Nonstop9h 20m

Chicago O'Hare Intl

Mon 23/11

15:45-05:55

Nonstop8h 10m

£570

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 7/10

06:15-14:00

1 stop13h 45m

Chicago O'Hare Intl

Mon 12/10

15:45-12:45

1 stop15h 00m

£571

LondonChicago

LCY London City - ORD Chicago O'Hare Intl

LCYORD

London City

Thu 19/11

07:40-14:55

1 stop13h 15m

Chicago O'Hare Intl

Mon 23/11

20:05-12:40

1 stop10h 35m

£571

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 31 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 17 hours 17 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.

Weekly flight availability to Illinois

The most flights from London to Illinois are scheduled on a Thursday (49 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (39 on average).

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 62 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 United Airlines,Aer Lingus, 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

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

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, Ryanair 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 £40, 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, Edinburgh Turnhouse offers the quickest one-way flight (8 hours 30 minutes).

  • 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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