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 19h 31m and 20h 05m, respectively.

$760 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

21 Apr

SYD

35h 47m

3 stops

ORD

6 May

ORD

32h 10m

3 stops

SYD

$1,499

Multiple Airlines

17 May

MEL

35h 24m

3 stops

ORD

24 May

ORD

38h 10m

2 stops

MEL

$1,514

Air Canada

4 June

BNE

36h 35m

2 stops

ORD

8 June

ORD

24h 25m

1 stop

BNE

$1,551

Air Canada

4 June

BNE

34h 25m

1 stop

ORD

8 June

ORD

24h 25m

1 stop

BNE

$1,579

Multiple Airlines

17 May

SYD

42h 54m

3 stops

ORD

24 May

ORD

37h 35m

2 stops

SYD

$1,591

Multiple Airlines

19 May

SYD

36h 54m

3 stops

MDW

26 May

MDW

38h 50m

3 stops

SYD

$1,612

Multiple Airlines

15 May

MEL

36h 34m

3 stops

MDW

22 May

MDW

39h 05m

3 stops

MEL

$1,701

Multiple Airlines

19 May

SYD

27h 49m

1 stop

ORD

26 May

ORD

43h 44m

1 stop

SYD

$1,725

Multiple Airlines

29 Apr

SYD

27h 00m

1 stop

ORD

7 May

ORD

35h 20m

2 stops

SYD

$1,743

Multiple Airlines

29 Apr

SYD

27h 00m

1 stop

ORD

5 May

ORD

47h 54m

2 stops

SYD

$1,744

Multiple Airlines

15 May

SYD

36h 49m

3 stops

MDW

22 May

MDW

38h 50m

3 stops

SYD

$1,750

Multiple Airlines

27 Apr

SYD

25h 12m

2 stops

ORD

4 May

ORD

37h 50m

2 stops

SYD

$1,782

Flights to Moline

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Multiple Airlines

29 Apr

BNE

28h 29m

2 stops

MLI

6 May

MLI

25h 09m

3 stops

BNE

$2,836

American Airlines

7 May

BNE

54h 44m

2 stops

MLI

11 May

MLI

39h 51m

2 stops

BNE

$3,106

American Airlines

7 May

BNE

54h 52m

2 stops

MLI

11 May

MLI

36h 07m

2 stops

BNE

$3,280

Find the cheapest flights from Australia to Illinois

Round-trip

One-way

Last minute

Recent return flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

13:15 - 10:02

SYD

ORD

35h 47m

3 stops

12:40 - 11:50

ORD

SYD

32h 10m

3 stops

$1,499Multiple Airlines

Tue, 21 Apr - Wed, 6 May

13:30 - 09:54

MEL

ORD

35h 24m

3 stops

07:15 - 12:25

ORD

MEL

38h 10m

2 stops

$1,514Multiple Airlines

Sun, 17 May - Sun, 24 May

10:15 - 07:50

BNE

ORD

36h 35m

2 stops

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

$1,551Air Canada

Thu, 4 Jun - Mon, 8 Jun

10:15 - 05:40

BNE

ORD

34h 25m

1 stop

15:40 - 07:05

ORD

BNE

24h 25m

1 stop

$1,579Air Canada

Thu, 4 Jun - Mon, 8 Jun

06:00 - 09:54

SYD

ORD

42h 54m

3 stops

07:15 - 11:50

ORD

SYD

37h 35m

2 stops

$1,591Multiple Airlines

Sun, 17 May - Sun, 24 May

09:45 - 19:30

MEL

STL

24h 45m

2 stops

09:41 - 06:45

STL

MEL

30h 04m

2 stops

$1,615American Airlines

Mon, 11 May - Thu, 21 May

09:30 - 16:57

MEL

STL

22h 27m

2 stops

18:55 - 07:30

STL

MEL

45h 35m

2 stops

$1,631United Airlines

Fri, 15 May - Thu, 21 May

09:45 - 23:59

MEL

STL

29h 14m

1 stop

06:21 - 06:45

STL

MEL

33h 24m

1 stop

$1,661Qantas Airways

Mon, 11 May - Tue, 19 May

09:45 - 08:05

MEL

STL

37h 20m

2 stops

15:33 - 10:35

STL

MEL

28h 02m

2 stops

$1,822American Airlines

Mon, 7 Sep - Sun, 27 Sep

06:00 - 18:06

ADL

ORD

26h 36m

2 stops

19:01 - 11:55

ORD

ADL

26h 24m

2 stops

$2,844Qantas Airways

Sat, 18 Jul - Sun, 26 Jul

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 21/4

13:15-10:02

3 stops35h 47m

Chicago O'Hare Intl

Wed 6/5

12:40-11:50

3 stops32h 10m

$1,499

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sun 17/5

13:30-09:54

3 stops35h 24m

Chicago O'Hare Intl

Sun 24/5

07:15-12:25

2 stops38h 10m

$1,514

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 4/6

10:15-07:50

2 stops36h 35m

Chicago O'Hare Intl

Mon 8/6

15:40-07:05

1 stop24h 25m

$1,551

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 4/6

10:15-05:40

1 stop34h 25m

Chicago O'Hare Intl

Mon 8/6

15:40-07:05

1 stop24h 25m

$1,579

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 17/5

06:00-09:54

3 stops42h 54m

Chicago O'Hare Intl

Sun 24/5

07:15-11:50

2 stops37h 35m

$1,591

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 11/5

09:45-19:30

2 stops24h 45m

Lambert-St Louis

Thu 21/5

09:41-06:45

2 stops30h 04m

$1,615

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 15/5

09:30-16:57

2 stops22h 27m

Lambert-St Louis

Thu 21/5

18:55-07:30

2 stops45h 35m

$1,631

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 11/5

09:45-23:59

1 stop29h 14m

Lambert-St Louis

Tue 19/5

06:21-06:45

1 stop33h 24m

$1,661

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/9

09:45-08:05

2 stops37h 20m

Lambert-St Louis

Sun 27/9

15:33-10:35

2 stops28h 02m

$1,822

Fastest return journey

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Sat 18/7

06:00-18:06

2 stops26h 36m

Chicago O'Hare Intl

Sun 26/7

19:01-11:55

2 stops26h 24m

$2,844

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, Air Canada and United Airlines 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 33% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 9 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	$760
Best Round-Trip Price	$1,499
Fastest flight time	27h 28m

The best one-way flight price to Illinois from Australia in the last 72 hours is $760 (Sydney Kingsford Smith to Chicago O'Hare Intl).

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The best round-trip flight price to Illinois from Australia in the last 72 hours is $1,499 (Sydney Kingsford Smith to Chicago O'Hare Intl).

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The fastest flight to Illinois from Australia takes 27h 28m (Melbourne to Chicago Midway).

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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 $119/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $854/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 Riverwalk and Millennium Park 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 9 airlines that fly to Illinois on a routine basis, but Qantas Airways, Air Canada and United Airlines happen to be the most popular among our users. In the past year, 33% 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 10 as of April 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.