Find flights
Airlines

$706+ Cheap flights to Illinois

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
20 Apr — 27 Apr1
1 adult

Flights to Illinois in 2025

Find the latest flights to Illinois in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 15 April 2025.

Return from

$1,609

One-way from

$792

Popular in

December

Cheapest in

March

Average price

$1,332
20/5-28/8
  • 20/5-28/8
  • 5 total stops
  • 65h 57m total
  • Sydney to Chicago
Search Deals
28/4
  • 28/4
  • 3 total stops
  • 34h 20m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($519 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($114 potential savings vs. average return price).
Search Deals
Average for return flights in April 2025
Search Deals

Find flight deals to Illinois

Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 15 April 2025.

Wed 28/513:15SYD - ORD
2 stops32h 27mMultiple Airlines
Wed 4/618:59ORD - SYD
2 stops25h 46mMultiple Airlines
Deal found 13/4$1,442
Mon 7/717:45SYD - ORD
1 stop20h 58mQantas Airways
Wed 30/708:50ORD - SYD
2 stops32h 50mQantas Airways
Deal found 14/4$1,922
Thu 31/711:50SYD - ORD
2 stops27h 25mAir New Zealand
Fri 8/815:54ORD - SYD
2 stops25h 51mAir New Zealand
Deal found 13/4$1,986
Mon 2/609:30SYD - ORD
1 stop22h 26mUnited Airlines
Sun 15/612:51ORD - SYD
1 stop27h 09mUnited Airlines
Deal found 13/4$2,068
Thu 29/513:15SYD - STL
2 stops24h 49mMultiple Airlines
Thu 5/605:30STL - SYD
2 stops39h 45mMultiple Airlines
Deal found 14/4$2,073
Mon 18/810:20SYD - STL
1 stop21h 25mUnited Airlines
Sat 8/1115:15STL - SYD
2 stops46h 45mUnited Airlines
Deal found 14/4$2,087
Tue 8/710:10SYD - ORD
1 stop43h 15mCathay Pacific
Thu 17/716:00ORD - SYD
1 stop27h 50mCathay Pacific
Deal found 14/4$2,098
Mon 2/609:25SYD - MDW
2 stops23h 11mDelta
Sun 15/612:44MDW - SYD
2 stops26h 51mDelta
Deal found 13/4$2,104
Mon 16/609:25SYD - ORD
2 stops23h 56mDelta
Mon 14/710:35ORD - SYD
2 stops29h 00mDelta
Deal found 12/4$2,104
Thu 29/509:20SYD - STL
3 stops49h 38mAir Canada
Thu 5/607:30STL - SYD
2 stops32h 50mAir Canada
Deal found 14/4$2,122
Sat 20/909:20SYD - ORD
1 stop20h 35mAir Canada
Thu 25/915:40ORD - SYD
1 stop24h 40mAir Canada
Deal found 13/4$2,122
Tue 1/720:55SYD - ORD
2 stops52h 08mANA
Tue 22/717:00ORD - SYD
2 stops35h 15mANA
Deal found 14/4$2,225

Cheapflights Fare Finder

Locate flights to Illinois that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 15 April 2025.
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 28/5

13:15-06:42

2 stops32h 27m

Chicago O'Hare Intl

Wed 4/6

18:59-11:45

2 stops25h 46m

$1,442

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 7/7

17:45-23:43

1 stop20h 58m

Chicago O'Hare Intl

Wed 30/7

08:50-08:40

2 stops32h 50m

$1,922

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 31/7

11:50-00:15

2 stops27h 25m

Chicago O'Hare Intl

Fri 8/8

15:54-08:45

2 stops25h 51m

$1,986

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/6

09:30-16:56

1 stop22h 26m

Chicago O'Hare Intl

Sun 15/6

12:51-07:00

1 stop27h 09m

$2,068

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 29/5

13:15-23:04

2 stops24h 49m

Lambert-St Louis

Thu 5/6

05:30-12:15

2 stops39h 45m

$2,073

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

10:20-16:45

1 stop21h 25m

Lambert-St Louis

Sat 8/11

15:15-07:00

2 stops46h 45m

$2,087

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 8/7

10:10-14:25

1 stop43h 15m

Chicago O'Hare Intl

Thu 17/7

16:00-10:50

1 stop27h 50m

$2,098

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 2/6

09:25-17:36

2 stops23h 11m

Chicago Midway

Sun 15/6

12:44-06:35

2 stops26h 51m

$2,104

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 16/6

09:25-18:21

2 stops23h 56m

Chicago O'Hare Intl

Mon 14/7

10:35-06:35

2 stops29h 00m

$2,104

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 29/5

09:20-19:58

3 stops49h 38m

Lambert-St Louis

Thu 5/6

07:30-07:20

2 stops32h 50m

$2,122

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 39 results
1
2
3
4

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
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 to Illinois

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 22 hours 13 minutes. Flights to Illinois from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly to Illinois?

Use this chart to determine the cheapest time to fly return from Sydney to Illinois. Price data was last updated on 16 December 2024.

Users looking for the lowest fares to Illinois should consider flying on Monday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday evenings, when prices are usually at their highest.

What are the most popular airlines that fly to Illinois?

The most popular airlines flying from Sydney to Illinois are Qantas Airways, Air Canada and United Airlines.

Qantas Airways

Qantas Airways

From $642

Air Canada

Air Canada

From $832

United Airlines

United Airlines

From $995

ANA

ANA

From $890

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are Qantas Airways, Air Canada and ANA.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm 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

Plan your trip to Illinois by taking into account the average temperature totals 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).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 15 April 2025.
Get a feel of what it's like to fly with Air Tahiti Nui, Korean Air and Japan Airlines to Illinois by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.8
Very Good
62 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Korean Air
8.4
Very Good
1,063 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very Good
1,440 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.3
Very Good
841 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Fiji Airways
8.0
Very Good
183 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Food

7.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Overall

8.8

Boarding

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

FAQs about flying to Illinois

  • 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, American Airlines 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 $67, while return flights cost around $248.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $784, however they can be found for as little as $157.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Brisbane offers the quickest one-way flight (20 hours 46 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 km away from Chicago O'Hare Intl).

See more FAQs

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.

Find flights to Illinois

Select your preferred flight destination in Illinois from the list below.
Flights to O'Hare Intl
Flights to Midway
Flights to Moline
Flights to Bloomington
Flights to Springfield
Flights to Belleville
Flights to Chicago

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 to Illinois?

Cheapflights helps you search for flights to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Illinois with no change fees?

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.

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

Yes! Start tracking prices for Illinois flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

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.
Site
©2025 Cheapflights