Find flights
Airlines

$873+ 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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
1 Feb — 8 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2026

Enter your travel dates to find the best prices.

Best flights to Illinois
Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.

Mon 19/116:00SYD - ORD
2 stops42h 03mAir Canada
Tue 3/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,544
Mon 19/114:15SYD - MDW
2 stops25h 07mDelta
Mon 2/213:26MDW - SYD
2 stops26h 04mDelta
Deal found 31/12$1,567
Sun 3/511:55SYD - ORD
2 stops24h 13mAir New Zealand
Wed 6/516:00ORD - SYD
2 stops25h 45mAir New Zealand
Deal found 30/12$1,688
Mon 19/111:20SYD - ORD
1 stop20h 30mUnited Airlines
Mon 2/218:29ORD - SYD
1 stop21h 46mUnited Airlines
Deal found 30/12$1,741
Sun 15/217:30SYD - STL
2 stops23h 29mMultiple Airlines
Sun 22/216:13STL - SYD
1 stop21h 42mMultiple Airlines
Deal found 31/12$1,897
Sun 15/211:20SYD - STL
1 stop29h 39mAmerican Airlines
Sun 22/206:38STL - SYD
1 stop33h 22mAmerican Airlines
Deal found 31/12$2,031
Thu 19/206:05SYD - STL
2 stops26h 23mQantas Airways
Mon 23/206:38STL - SYD
1 stop33h 22mQantas Airways
Deal found 1/1$2,237
Mon 19/116:00SYD - ORD
2 stops39h 55mAir Canada
Mon 2/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,579
Sat 14/211:45SYD - ORD
2 stops34h 16mAir New Zealand
Sat 21/209:00ORD - SYD
2 stops30h 45mAir New Zealand
Deal found 31/12$1,757
Wed 4/311:20SYD - ORD
1 stop20h 21mAir Canada
Wed 25/307:25ORD - SYD
2 stops33h 10mAir Canada
Deal found 31/12$1,646
Wed 18/211:20SYD - ORD
1 stop20h 21mAir Canada
Sun 22/220:40ORD - SYD
2 stops43h 55mAir Canada
Deal found 29/12$1,687
Wed 17/609:15SYD - MDW
2 stops24h 16mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sat 16/511:55SYD - ORD
2 stops24h 36mAir New Zealand
Sat 6/616:40ORD - SYD
2 stops25h 05mAir New Zealand
Deal found 30/12$1,997
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Wed 1/709:30MDW - SYD
2 stops30h 05mDelta
Deal found 1/1$2,075
Thu 19/211:20SYD - STL
2 stops26h 06mAir Canada
Mon 23/216:30STL - SYD
2 stops24h 05mAir Canada
Deal found 1/1$1,760
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sun 15/211:20SYD - STL
2 stops26h 06mAir Canada
Sun 22/218:00STL - SYD
2 stops46h 35mAir Canada
Deal found 31/12$1,769
Tue 16/609:15SYD - MDW
2 stops24h 16mDelta
Mon 29/614:00MDW - SYD
2 stops25h 35mDelta
Deal found 1/1$2,075
Sat 14/211:20SYD - ORD
1 stop20h 21mAir Canada
Sat 21/207:25ORD - SYD
2 stops33h 10mAir Canada
Deal found 31/12$1,796
Thu 18/609:15SYD - MDW
2 stops27h 30mDelta
Sun 28/609:20MDW - SYD
2 stops30h 15mDelta
Deal found 1/1$2,100
Mon 26/111:20SYD - ORD
1 stop20h 21mAir Canada
Thu 29/115:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,879
Sat 6/609:15SYD - MDW
2 stops24h 16mDelta
Mon 17/813:00MDW - SYD
2 stops26h 35mDelta
Deal found 1/1$2,150
Fri 12/609:15SYD - MDW
2 stops24h 16mDelta
Sun 12/714:00MDW - SYD
2 stops25h 35mDelta
Deal found 31/12$2,150

Find flights to Illinois

Browse one-way and return flights deals to Illinois on Cheapflights. Flight deals are based on user searches and were last updated on 2 January 2026
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to St. Louis

Find flight deals to Illinois

Find the latest flights to Illinois in 2026, 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 2 January 2026.

Return from

$1,542

One-way from

$873

Popular in

December

Cheapest in

March

Average price

$1,633
Air Canada
  • Air Canada
  • 4/2-25/2
  • 2 total stops
  • 49h 52m total
  • Sydney to Chicago
Search Deals
18/2
  • 18/2
  • 3 total stops
  • 52h 26m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($351 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average return price).
Search Deals
Average for return flights in January 2026
Search Deals

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 2 January 2026.
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

Mon 19/1

16:00-17:03

2 stops42h 03m

Chicago O'Hare Intl

Tue 3/2

15:35-09:35

1 stop25h 00m

$1,544

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 19/1

14:15-22:22

2 stops25h 07m

Chicago Midway

Mon 2/2

13:26-08:30

2 stops26h 04m

$1,567

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

16:00-14:55

2 stops39h 55m

Chicago O'Hare Intl

Mon 2/2

15:35-09:35

1 stop25h 00m

$1,579

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 4/3

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Wed 25/3

07:25-08:35

2 stops33h 10m

$1,646

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 18/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Sun 22/2

20:40-09:35

2 stops43h 55m

$1,687

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 3/5

11:55-21:08

2 stops24h 13m

Chicago O'Hare Intl

Wed 6/5

16:00-08:45

2 stops25h 45m

$1,688

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

11:20-14:50

1 stop20h 30m

Chicago O'Hare Intl

Mon 2/2

18:29-09:15

1 stop21h 46m

$1,741

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 14/2

11:45-05:01

2 stops34h 16m

Chicago O'Hare Intl

Sat 21/2

09:00-08:45

2 stops30h 45m

$1,757

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

Mon 23/2

16:30-09:35

2 stops24h 05m

$1,760

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 15/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

Sun 22/2

18:00-09:35

2 stops46h 35m

$1,769

Flights are sorted by cheapest return flights first.

Deals found on 1/1

Showing 1-10 of 24 results
1
2
3

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 23 hours 25 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.

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 $950
United Airlines
United Airlines
From $1,324
Air Canada
Air Canada
From $1,157
Air New Zealand
Air New Zealand
From $1,150

What are the cheapest airlines that fly to Illinois?

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

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 2 January 2026.
Read through reviews of airlines serving the United States, such as Air New Zealand, Qantas Airways, andUnited Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air New Zealand
8.0
Very Good
563 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Qantas Airways
7.5
Good
961 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
United Airlines
7.4
Good
9,129 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
American Airlines
7.2
Good
11,075 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air Canada
7.1
Good
10,574 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Food

7.4

Overall

8.0

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………

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, Qantas Airways 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 $49, while return flights cost around $633.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $842, however they can be found for as little as $633.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Melbourne offers the quickest one-way flight (20 hours 57 minutes).

  • Which airport is closest to River North?

    f being close to River North 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 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.