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$799+ 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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
22 Apr — 29 Apr1
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
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 23 March 2026.

Tue 21/409:20
SYD
-
ORD
1 stop20h 25m
Air Canada
Tue 28/407:13
ORD
-
SYD
2 stops33h 07m
Air Canada
Deal found 22/3$1,282
Thu 16/409:20
SYD
-
ORD
1 stop20h 25m
Air Canada
Wed 29/408:40
ORD
-
SYD
2 stops31h 40m
Air Canada
Deal found 18/3$1,285
Tue 5/509:20
SYD
-
ORD
2 stops44h 33m
Air Canada
Tue 12/515:40
ORD
-
SYD
1 stop24h 40m
Air Canada
Deal found 21/3$1,288
Thu 16/409:20
SYD
-
ORD
2 stops25h 45m
Air Canada
Thu 23/408:40
ORD
-
SYD
2 stops31h 40m
Air Canada
Deal found 18/3$1,290
Mon 4/509:20
SYD
-
ORD
1 stop20h 25m
Air Canada
Mon 11/508:45
ORD
-
SYD
2 stops31h 35m
Air Canada
Deal found 19/3$1,292
Wed 6/509:20
SYD
-
ORD
1 stop25h 55m
Air Canada
Wed 13/508:45
ORD
-
SYD
2 stops31h 35m
Air Canada
Deal found 22/3$1,297
Thu 7/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Thu 14/507:05
STL
-
SYD
2 stops33h 15m
Air Canada
Deal found 23/3$1,340
Wed 20/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Thu 28/513:05
STL
-
SYD
2 stops27h 15m
Air Canada
Deal found 22/3$1,350
Wed 20/509:20
SYD
-
STL
2 stops41h 46m
Multiple Airlines
Thu 28/513:38
STL
-
SYD
2 stops26h 42m
Multiple Airlines
Deal found 20/3$1,351
Thu 14/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Sun 7/607:05
STL
-
SYD
2 stops57h 15m
Air Canada
Deal found 19/3$1,355
Sun 13/909:20
SYD
-
STL
2 stops43h 40m
Air Canada
Wed 23/908:55
STL
-
SYD
2 stops55h 25m
Air Canada
Deal found 23/3$1,410
Fri 7/809:20
SYD
-
STL
2 stops43h 42m
Air Canada
Mon 31/808:55
STL
-
SYD
2 stops55h 25m
Air Canada
Deal found 20/3$1,608

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 23 March 2026
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to Moline
Look for other cheap flights to Bloomington
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 23 March 2026.

Return from

$1,282

One-way from

$799

Popular in

December

Cheapest in

August

Average price

$1,590
Air Canada
  • Air Canada
  • 21/4-28/4
  • 3 total stops
  • 53h 32m total
  • Sydney to Chicago
Search Deals
30/7
  • 30/7
  • 3 total stops
  • 36h 59m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($73 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average return price).
Search Deals
Average for return flights in March 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 23 March 2026.
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

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 16/4

09:20-14:45

1 stop20h 25m

Chicago O'Hare Intl

Thu 23/4

08:40-07:20

2 stops31h 40m

$1,294

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 2/5

09:20-14:45

1 stop20h 25m

Chicago O'Hare Intl

Sat 9/5

08:45-07:20

2 stops31h 35m

$1,427

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,434

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 21/4

09:15-17:58

2 stops23h 43m

Chicago Midway

Tue 28/4

10:41-06:50

2 stops29h 09m

$1,670

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Wed 17/6

09:15-08:37

2 stops38h 22m

Chicago Midway

Sun 12/7

09:49-06:50

2 stops30h 01m

$1,677

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 12/5

09:15-18:33

2 stops24h 18m

Chicago Midway

Tue 26/5

13:22-06:50

2 stops26h 28m

$1,677

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 4/5

09:15-17:58

2 stops23h 43m

Chicago Midway

Mon 11/5

12:53-06:50

2 stops26h 57m

$1,683

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

14:36-07:05

2 stops25h 29m

$1,718

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Thu 28/5

19:23-06:55

1 stop20h 32m

$1,744

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 6/6

10:20-14:50

1 stop19h 30m

Chicago O'Hare Intl

Sat 27/6

21:30-07:00

1 stop42h 30m

$1,744

Flights are sorted by cheapest return flights first.

Deals found on 18/3

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
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 21 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.

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 $967
United Airlines
United Airlines
From $1,276
Air Canada
Air Canada
From $1,079
Air New Zealand
Air New Zealand
From $1,098

What are the cheapest airlines that fly to Illinois?

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

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 23 March 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
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.
Air New Zealand
8.0
Very Good
618 reviews
Air New Zealand
8.0
Very Good
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.
Qantas Airways
7.5
Good
1,009 reviews
Air New Zealand
8.0
Very Good
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.
United Airlines
7.4
Good
9,463 reviews
Air New Zealand
8.0
Very Good
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.
American Airlines
7.1
Good
11,486 reviews
Air New Zealand
8.0
Very Good
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.
Air Canada
7.1
Good
10,835 reviews
Air New Zealand
8.0
Very Good
618 reviews
Check prices

Crew

8.5

Entertainment

7.4

Comfort

8.0

Food

7.4

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Debra,Mar 2026

HNL - AKL

My seat was very comfortable. The movies were good. The food was delicious. It ran on time.

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 $82, while return flights cost around $256.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $1,742, however they can be found for as little as $256.

  • 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 (19 hours 20 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

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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

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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.

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