How long is the flight from Australia to Illinois?

If you’re flying from a popular airport in Australia, such as Sydney Kingsford Smith or Melbourne, and flying into Illinois, then you can expect flight times to average 25h 34m and 25h 05m, respectively.

$550 Cheap Flights to Illinois in 2026

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Recent flights found to popular cities in Illinois

Find flights to these popular cities in Illinois from your nearest airport.

Flights to Chicago

Search all flight deals to Chicago

Multiple Airlines

19 Oct

SYD

31h 01m

3 stops

ORD

26 Oct

ORD

38h 05m

3 stops

SYD

$1,404

Qantas Airways

4 Dec

SYD

25h 34m

1 stop

ORD

5 Dec

ORD

40h 25m

1 stop

SYD

$1,460

Cathay Pacific

19 Oct

BNE

40h 35m

1 stop

ORD

1 Nov

ORD

28h 35m

1 stop

BNE

$1,567

Multiple Airlines

16 Oct

MEL

30h 56m

3 stops

ORD

23 Oct

ORD

38h 05m

3 stops

MEL

$1,574

Cathay Pacific

21 Oct

BNE

40h 35m

1 stop

ORD

29 Oct

ORD

41h 10m

1 stop

BNE

$1,614

Cathay Pacific

27 Jan

BNE

40h 15m

1 stop

ORD

10 Feb

ORD

41h 10m

1 stop

BNE

$1,618

Multiple Airlines

19 Oct

PER

33h 18m

2 stops

ORD

1 Nov

ORD

38h 10m

2 stops

PER

$1,621

Cathay Pacific

5 Nov

BNE

40h 15m

1 stop

ORD

9 Nov

ORD

28h 35m

1 stop

BNE

$1,644

Cathay Pacific

5 Nov

BNE

40h 15m

1 stop

ORD

9 Nov

ORD

28h 35m

1 stop

BNE

$1,651

Cathay Pacific

5 Nov

BNE

40h 15m

1 stop

ORD

9 Nov

ORD

28h 35m

1 stop

BNE

$1,653

Multiple Airlines

22 Sept

MEL

31h 13m

3 stops

ORD

27 Sept

ORD

38h 55m

3 stops

MEL

$1,667

Multiple Airlines

18 Oct

PER

50h 58m

3 stops

ORD

1 Nov

ORD

48h 20m

3 stops

PER

$1,675

Flights to Moline

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United Airlines

10 Dec

BNE

49h 58m

2 stops

MLI

6 Jan

MLI

30h 40m

2 stops

BNE

$2,761

Qatar Airways

11 Nov

BNE

42h 12m

2 stops

MLI

15 Nov

MLI

38h 10m

2 stops

BNE

$3,025

Qatar Airways

11 Nov

BNE

42h 12m

2 stops

MLI

15 Nov

MLI

38h 10m

2 stops

BNE

$3,031

Qatar Airways

11 Nov

BNE

42h 12m

2 stops

MLI

15 Nov

MLI

38h 10m

2 stops

BNE

$3,032

American Airlines

10 Dec

BNE

23h 03m

1 stop

MLI

6 Jan

MLI

25h 57m

2 stops

BNE

$3,064

American Airlines

11 Nov

BNE

26h 07m

2 stops

MLI

15 Nov

MLI

24h 32m

2 stops

BNE

$3,067

American Airlines

11 Nov

BNE

26h 57m

2 stops

MLI

15 Nov

MLI

36h 40m

2 stops

BNE

$3,068

Qantas Airways

10 Dec

BNE

28h 27m

2 stops

MLI

6 Jan

MLI

35h 46m

3 stops

BNE

$3,115

Multiple Airlines

10 Dec

BNE

37h 43m

3 stops

MLI

6 Jan

MLI

39h 35m

3 stops

BNE

$3,352

American Airlines

10 Dec

BNE

23h 03m

1 stop

MLI

6 Jan

MLI

25h 52m

1 stop

BNE

$4,069

United Airlines

11 Dec

BNE

25h 43m

2 stops

MLI

8 Jan

MLI

47h 45m

2 stops

BNE

$5,255

United Airlines

16 Sept

BNE

25h 31m

2 stops

MLI

9 Oct

MLI

28h 41m

2 stops

BNE

$7,431

Find the cheapest flights from Australia to Illinois

Return

One-way

Last minute

Recent return flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

14:05 - 21:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

24h 54m1 stop Dallas/Fort Worth

06:00 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 00m1 stop Los Angeles

$1,361Qantas Airways

Wed, 18 Nov - Thu, 19 Nov

14:15 - 05:16SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

31h 01m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

06:30 - 12:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

38h 05m3 stops Denver Intl Los Angeles Nadi

$1,404Multiple Airlines

Mon, 19 Oct - Mon, 26 Oct

21:25 - 05:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 34m1 stop San Francisco

21:00 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

40h 25m1 stop Los Angeles

$1,460Qantas Airways

Fri, 4 Dec - Sat, 5 Dec

22:45 - 16:28MEL Melbourne-STL Lambert-St Louis

34h 43m2 stops Los Angeles Dallas/Fort Worth

09:00 - 05:00STL Lambert-St Louis-MEL Melbourne

27h 00m1 stop Dallas/Fort Worth

$1,471American Airlines

Fri, 5 Feb - Tue, 9 Feb

22:45 - 16:28MEL Melbourne-STL Lambert-St Louis

34h 43m2 stops Los Angeles Dallas/Fort Worth

09:00 - 05:00STL Lambert-St Louis-MEL Melbourne

27h 00m1 stop Dallas/Fort Worth

$1,472American Airlines

Fri, 5 Feb - Tue, 9 Feb

12:20 - 13:55BNE Brisbane-ORD Chicago O'Hare Intl

40h 35m1 stop Hong Kong Intl

14:10 - 10:45ORD Chicago O'Hare Intl-BNE Brisbane

28h 35m1 stop Hong Kong Intl

$1,567Cathay Pacific

Mon, 19 Oct - Sun, 1 Nov

14:20 - 05:16MEL Melbourne-ORD Chicago O'Hare Intl

30h 56m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

06:20 - 12:25ORD Chicago O'Hare Intl-MEL Melbourne

38h 05m3 stops Dallas/Fort Worth Los Angeles Nadi

$1,574Multiple Airlines

Fri, 16 Oct - Fri, 23 Oct

12:20 - 13:55BNE Brisbane-ORD Chicago O'Hare Intl

40h 35m1 stop Hong Kong Intl

15:10 - 23:20ORD Chicago O'Hare Intl-BNE Brisbane

41h 10m1 stop Hong Kong Intl

$1,614Cathay Pacific

Wed, 21 Oct - Thu, 29 Oct

10:30 - 17:01SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 31m2 stops Los Angeles Chicago O'Hare Intl

13:08 - 08:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 57m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles

$1,743United Airlines

Tue, 20 Oct - Tue, 27 Oct

11:50 - 23:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 34m2 stops San Francisco Chicago O'Hare Intl

19:05 - 09:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

21h 15m1 stop San Francisco

$1,801United Airlines

Sat, 14 Nov - Sun, 22 Nov

Recent last minute flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

07:50 - 00:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 09m2 stops Auckland Intl Houston George Bush Intcntl

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 45m2 stops Los Angeles Auckland Intl

$1,915Air New Zealand

Thu, 10 Sep - Sun, 13 Sep

22:15 - 20:45BNE Brisbane-ORD Chicago O'Hare Intl

37h 30m1 stop Taipei City Taiwan Taoyuan Intl

00:30 - 20:00ORD Chicago O'Hare Intl-BNE Brisbane

28h 30m1 stop Taipei City Taiwan Taoyuan Intl

$2,037EVA Air

Sat, 12 Sep - Tue, 15 Sep

12:20 - 14:20BNE Brisbane-ORD Chicago O'Hare Intl

41h 00m1 stop Hong Kong Intl

16:15 - 10:50ORD Chicago O'Hare Intl-BNE Brisbane

27h 35m1 stop Hong Kong Intl

$2,097Cathay Pacific

Sat, 12 Sep - Fri, 25 Sep

14:25 - 14:20MEL Melbourne-ORD Chicago O'Hare Intl

38h 55m1 stop Hong Kong Intl

16:15 - 23:15ORD Chicago O'Hare Intl-MEL Melbourne

39h 00m1 stop Hong Kong Intl

$2,111Cathay Pacific

Tue, 8 Sep - Thu, 8 Oct

15:50 - 14:20PER Perth-ORD Chicago O'Hare Intl

35h 30m2 stops Kuala Lumpur Intl Hong Kong Intl

16:00 - 01:10ORD Chicago O'Hare Intl-PER Perth

44h 10m2 stops Hong Kong Intl Kuala Lumpur Intl

$2,155Malaysia Airlines

Wed, 9 Sep - Sat, 12 Sep

09:45 - 17:37MEL Melbourne-STL Lambert-St Louis

46h 52m2 stops Los Angeles Phoenix Sky Harbor Intl

18:43 - 05:00STL Lambert-St Louis-MEL Melbourne

43h 17m1 stop Dallas/Fort Worth

$2,167American Airlines

Mon, 7 Sep - Sun, 27 Sep

09:45 - 08:24MEL Melbourne-STL Lambert-St Louis

37h 39m2 stops Los Angeles Chicago O'Hare Intl

18:43 - 05:00STL Lambert-St Louis-MEL Melbourne

43h 17m1 stop Dallas/Fort Worth

$2,395American Airlines

Mon, 7 Sep - Sun, 27 Sep

07:25 - 07:20MEL Melbourne-ORD Chicago O'Hare Intl

38h 55m1 stop Tokyo Narita

14:10 - 10:00ORD Chicago O'Hare Intl-MEL Melbourne

28h 50m2 stops Tokyo Haneda Sydney Kingsford Smith

$2,609Japan Airlines

Sat, 12 Sep - Sun, 20 Sep

12:15 - 10:45PER Perth-ORD Chicago O'Hare Intl

35h 30m2 stops Singapore Changi Tokyo Haneda

14:10 - 00:40ORD Chicago O'Hare Intl-PER Perth

45h 30m2 stops Tokyo Haneda Singapore Changi

$2,618Japan Airlines

Thu, 10 Sep - Sat, 12 Sep

10:55 - 18:39MEL Melbourne-STL Lambert-St Louis

22h 44m1 stop San Francisco

07:08 - 08:15STL Lambert-St Louis-MEL Melbourne

34h 07m1 stop San Francisco

$2,879United Airlines

Mon, 7 Sep - Sun, 27 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 18/11

14:05-21:59

1 stop24h 54m

Lambert-St Louis

Thu 19/11

06:00-09:00

1 stop34h 00m

$1,361

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 19/10

14:15-05:16

3 stops31h 01m

Chicago O'Hare Intl

Mon 26/10

06:30-12:35

3 stops38h 05m

$1,404

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Fri 4/12

21:25-05:59

1 stop25h 34m

Chicago O'Hare Intl

Sat 5/12

21:00-06:25

1 stop40h 25m

$1,460

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,471

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,472

BrisbaneChicago

BNE Brisbane - ORD Chicago O'Hare Intl

BNEORD

Brisbane

Mon 19/10

12:20-13:55

1 stop40h 35m

Chicago O'Hare Intl

Sun 1/11

14:10-10:45

1 stop28h 35m

$1,567

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Fri 16/10

14:20-05:16

3 stops30h 56m

Chicago O'Hare Intl

Fri 23/10

06:20-12:25

3 stops38h 05m

$1,574

BrisbaneChicago

BNE Brisbane - ORD Chicago O'Hare Intl

BNEORD

Brisbane

Wed 21/10

12:20-13:55

1 stop40h 35m

Chicago O'Hare Intl

Thu 29/10

15:10-23:20

1 stop41h 10m

$1,614

Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 20/10

10:30-17:01

2 stops22h 31m

Lambert-St Louis

Tue 27/10

13:08-08:05

3 stops26h 57m

$1,743

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 14/11

11:50-23:24

2 stops28h 34m

Lambert-St Louis

Sun 22/11

19:05-09:20

1 stop21h 15m

$1,801

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Illinois flights insights and trends

Explore insights for your Illinois flight to craft the best travel plan

Airlines

Other information

Which airlines fly to Illinois?

Qantas Airways, United Airlines and Air New Zealand are the top three most popular airlines that fly to Illinois from Australia according to our data. Qantas Airways is the first choice among our users, with 37% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

Cheapest flights to cities in Illinois

Click on the cities below to find out when it's cheapest to fly to Illinois from Australia

Chicago

Find flights to Chicago

Cheap Illinois flight deals and tips

Summary info about Illinois flight prices, duration and airlines

Best One-Way Price	$550
Best Round-Trip Price	$1,361
Fastest flight time	27h 59m

The best one-way flight price to Illinois from Australia in the last 5 days is $550 (Sydney Kingsford Smith to Chicago O'Hare Intl).

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The best return flight price to Illinois from Australia in the last 5 days is $1,361 (Sydney Kingsford Smith to Lambert-St Louis).

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The fastest flight to Illinois from Australia takes 27h 59m (Melbourne to Lambert-St Louis).

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Frequently asked questions about flying to Illinois

What is the cheapest flight I can find to Illinois?

For prices as low as $104/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $679/pp.

What is the best airport to fly into to visit Chicago?

Chicago is about 99% more popular to visit than any other city in Illinois, according to momondo users. When visiting Chicago, it is recommended to fly into Chicago O'Hare Intl Airport, where you can typically get the cheapest prices and the most convenient travel options into the city.

I plan on visiting River North. Which airport is the quickest drive?

The closest airport to River North is Chicago O'Hare Intl Airport, and would make for the quickest drive. For those interested in a secondary airport to fly into, consider looking at flights heading to Chicago Midway Airport.

What are the most popular landmarks in Illinois?

When visiting Illinois, the majority of people tend to find River North, Chicago Water Tower and Chicago Riverwalk to be the most notable landmarks in the area.

What is the weather like in Illinois?

The temperatures in Illinois range from -5 °C to 23 °C depending on the time of year. The warmest month in Illinois is July, and the coldest month in Illinois is January. Those looking for a drier month during their visit should travel during the months of January, February, or December, when rain is least likely compared to the rest of the year.

Which airlines fly to Illinois?

There are 8 airlines that fly to Illinois on a routine basis, but Qantas Airways, United Airlines and Air Canada happen to be the most popular among our users. In the past year, 36% of those who searched for flights to Illinois looked to travel with Qantas Airways, making this airline the top choice among momondo travellers.

When did momondo last update prices for flights to Illinois?

Prices for flights to Illinois refresh daily.

How many operators does momondo search for flights to Illinois?

The number of operators available for flights to Illinois is 8 as of September 2026.

How old do you have to be to fly to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Illinois. Millions of users trust and use momondo every year so you are in good company.

Can I find flights to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois with this policy.

How can momondo help me find flights to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as filter your options to help you make an informed choice when booking flights to Illinois.

I’m not ready to book a flight to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track flight prices for Illinois and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.