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$862+ 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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
13 Apr — 20 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 14 March 2026.

Sat 25/413:15
SYD
-
ORD
2 stops31h 20m
Multiple Airlines
Sat 2/515:00
ORD
-
SYD
2 stops29h 50m
Multiple Airlines
Deal found 11/3$1,294
Sun 26/413:15
SYD
-
ORD
2 stops31h 20m
Multiple Airlines
Sun 3/505:15
ORD
-
SYD
2 stops39h 35m
Multiple Airlines
Deal found 12/3$1,408
Tue 21/413:15
SYD
-
ORD
2 stops25h 12m
Multiple Airlines
Fri 24/414:00
ORD
-
SYD
2 stops41h 10m
Multiple Airlines
Deal found 11/3$1,440
Fri 5/611:55
SYD
-
ORD
2 stops26h 20m
Air New Zealand
Fri 19/615:47
ORD
-
SYD
2 stops35h 03m
Air New Zealand
Deal found 10/3$1,460
Tue 2/611:55
SYD
-
ORD
2 stops26h 21m
Air New Zealand
Fri 19/616:30
ORD
-
SYD
2 stops25h 15m
Air New Zealand
Deal found 12/3$1,473
Tue 4/811:55
SYD
-
ORD
2 stops26h 21m
Air New Zealand
Mon 24/816:20
ORD
-
SYD
2 stops25h 25m
Air New Zealand
Deal found 10/3$1,521
Fri 24/411:55
SYD
-
ORD
2 stops26h 33m
Air New Zealand
Fri 1/515:45
ORD
-
SYD
2 stops26h 00m
Air New Zealand
Deal found 9/3$1,528
Wed 5/811:55
SYD
-
STL
2 stops37h 12m
Air New Zealand
Sat 29/815:02
STL
-
SYD
2 stops26h 43m
Air New Zealand
Deal found 11/3$1,607
Tue 28/409:20
SYD
-
STL
2 stops45h 05m
Air Canada
Tue 5/507:05
STL
-
SYD
2 stops33h 15m
Air Canada
Deal found 14/3$1,625
Thu 6/809:20
SYD
-
STL
2 stops43h 42m
Air Canada
Sun 30/814:40
STL
-
SYD
2 stops49h 40m
Air Canada
Deal found 13/3$1,628
Thu 14/509:20
SYD
-
STL
2 stops25h 44m
Air Canada
Sat 6/616:45
STL
-
SYD
2 stops23h 35m
Air Canada
Deal found 13/3$1,679
Wed 5/811:55
SYD
-
STL
3 stops27h 02m
Multiple Airlines
Sat 29/815:02
STL
-
SYD
2 stops28h 38m
Multiple Airlines
Deal found 11/3$1,728

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 14 March 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 14 March 2026.

Return from

$1,294

One-way from

$862

Popular in

December

Cheapest in

August

Average price

$1,581
25/4-2/5
  • 25/4-2/5
  • 4 total stops
  • 61h 10m total
  • Sydney to Chicago
Search Deals
Air New Zealand
  • Air New Zealand
  • 22/5
  • 2 total stops
  • 28h 20m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($75 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($23 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 14 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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 28/4

09:20-15:25

2 stops45h 05m

Lambert-St Louis

Tue 5/5

07:05-07:20

2 stops33h 15m

$1,625

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 13/7

09:55-21:36

2 stops26h 41m

Chicago O'Hare Intl

Mon 10/8

15:47-08:45

2 stops25h 58m

$1,627

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 16/5

11:55-00:45

2 stops27h 50m

Chicago O'Hare Intl

Sat 6/6

16:45-08:45

2 stops25h 00m

$1,628

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 31/5

05:10-07:20

2 stops35h 10m

$1,776

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 28/4

09:10-16:41

2 stops22h 31m

Lambert-St Louis

Tue 5/5

06:21-07:05

1 stop33h 44m

$1,848

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 28/4

09:10-23:57

1 stop29h 47m

Lambert-St Louis

Tue 5/5

06:21-07:05

1 stop33h 44m

$1,848

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

11:55-08:39

3 stops35h 44m

Lambert-St Louis

Sat 6/6

13:13-08:45

3 stops28h 32m

$1,888

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 24/4

09:20-15:25

2 stops45h 05m

Lambert-St Louis

Fri 1/5

14:35-07:20

2 stops25h 45m

$1,931

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Sat 6/6

19:20-06:55

1 stop20h 35m

$1,951

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 22/6

09:15-17:30

1 stop23h 15m

Chicago O'Hare Intl

Sun 19/7

07:15-06:50

2 stops32h 35m

$2,100

Flights are sorted by cheapest return flights first.

Deals found on 10/3

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 23 hours 3 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 $963
United Airlines
United Airlines
From $1,255
Air Canada
Air Canada
From $1,077
Air New Zealand
Air New Zealand
From $1,092

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 14 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
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air New Zealand
8.0
Very Good
610 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Qantas Airways
7.5
Good
1,004 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
United Airlines
7.4
Good
9,424 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
American Airlines
7.1
Good
11,465 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.
Air Canada
7.1
Good
10,800 reviews
Air New Zealand
8.0
Very Good
610 reviews
Check prices

Entertainment

7.4

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Food

7.4

Reviews

1 / 20
10.0
Excellent

Marsha,Feb 2026

LAX - AKL

Air New Zealand is a great airline. Airline staff made us feel welcome and flight attendants were attentive and kind.

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 $81, while return flights cost around $355.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $470, however they can be found for as little as $355.

  • 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 43 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
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How does Cheapflights help users find flights to Illinois?

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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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