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 20h 37m and 25h 24m, respectively.

$724 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

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Multiple Airlines

7 May

MEL

31h 05m

2 stops

ORD

14 May

ORD

39h 45m

2 stops

MEL

$1,314

Multiple Airlines

25 Apr

SYD

31h 20m

2 stops

ORD

2 May

ORD

29h 50m

2 stops

SYD

$1,317

Multiple Airlines

7 May

MEL

24h 57m

2 stops

ORD

17 May

ORD

40h 10m

2 stops

MEL

$1,368

Air Canada

12 May

BNE

19h 45m

1 stop

ORD

19 May

ORD

31h 20m

2 stops

BNE

$1,380

Air Canada

12 May

BNE

25h 08m

2 stops

ORD

19 May

ORD

31h 20m

2 stops

BNE

$1,390

Air Canada

12 May

BNE

19h 45m

1 stop

ORD

19 May

ORD

24h 25m

1 stop

BNE

$1,391

Air Canada

4 June

BNE

36h 35m

2 stops

ORD

8 June

ORD

24h 25m

1 stop

BNE

$1,400

Air Canada

4 June

BNE

36h 35m

2 stops

ORD

8 June

ORD

29h 00m

2 stops

BNE

$1,405

Multiple Airlines

4 June

SYD

37h 30m

2 stops

ORD

25 June

ORD

24h 40m

1 stop

SYD

$1,407

Air Canada

7 May

BNE

25h 15m

1 stop

ORD

14 May

ORD

42h 45m

2 stops

BNE

$1,410

Air Canada

7 May

BNE

25h 08m

2 stops

ORD

14 May

ORD

42h 45m

2 stops

BNE

$1,416

Air Canada

4 June

BNE

19h 30m

1 stop

ORD

8 June

ORD

24h 25m

1 stop

BNE

$1,426

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.

13:30 - 05:35

MEL

ORD

31h 05m

2 stops

05:15 - 12:00

ORD

MEL

39h 45m

2 stops

$1,314Multiple Airlines

Thu, 7 May - Thu, 14 May

13:15 - 05:35

SYD

ORD

31h 20m

2 stops

15:00 - 11:50

ORD

SYD

29h 50m

2 stops

$1,317Multiple Airlines

Sat, 25 Apr - Sat, 2 May

13:30 - 23:27

MEL

ORD

24h 57m

2 stops

05:15 - 12:25

ORD

MEL

40h 10m

2 stops

$1,368Multiple Airlines

Thu, 7 May - Sun, 17 May

10:00 - 14:45

BNE

ORD

19h 45m

1 stop

08:45 - 07:05

ORD

BNE

31h 20m

2 stops

$1,380Air Canada

Tue, 12 May - Tue, 19 May

10:00 - 20:08

BNE

ORD

25h 08m

2 stops

08:45 - 07:05

ORD

BNE

31h 20m

2 stops

$1,390Air Canada

Tue, 12 May - Tue, 19 May

13:35 - 19:30

MEL

STL

20h 55m

1 stop

15:38 - 05:00

STL

MEL

22h 22m

1 stop

$1,595Qantas Airways

Mon, 11 May - Mon, 18 May

09:00 - 17:21

MEL

STL

23h 21m

2 stops

18:11 - 10:35

STL

MEL

25h 24m

2 stops

$1,604American Airlines

Fri, 8 May - Fri, 15 May

13:35 - 22:19

MEL

STL

23h 44m

2 stops

09:34 - 05:00

STL

MEL

28h 26m

1 stop

$1,631American Airlines

Mon, 11 May - Mon, 18 May

10:55 - 18:17

MEL

STL

22h 22m

1 stop

13:18 - 08:15

STL

MEL

27h 57m

2 stops

$1,691United Airlines

Fri, 31 Jul - Sun, 6 Sep

23:55 - 15:52

PER

ORD

28h 57m

2 stops

15:12 - 11:15

ORD

PER

31h 03m

2 stops

$2,055Qantas Airways

Mon, 1 Jun - Tue, 25 Aug

Fly from

Route

Depart

Return

Price

Cheapest return flight

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Thu 7/5

13:30-05:35

2 stops31h 05m

Chicago O'Hare Intl

Thu 14/5

05:15-12:00

2 stops39h 45m

$1,314

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 25/4

13:15-05:35

2 stops31h 20m

Chicago O'Hare Intl

Sat 2/5

15:00-11:50

2 stops29h 50m

$1,317

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Thu 7/5

13:30-23:27

2 stops24h 57m

Chicago O'Hare Intl

Sun 17/5

05:15-12:25

2 stops40h 10m

$1,368

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 12/5

10:00-14:45

1 stop19h 45m

Chicago O'Hare Intl

Tue 19/5

08:45-07:05

2 stops31h 20m

$1,380

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 12/5

10:00-20:08

2 stops25h 08m

Chicago O'Hare Intl

Tue 19/5

08:45-07:05

2 stops31h 20m

$1,390

Fastest return journey

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 11/5

13:35-19:30

1 stop20h 55m

Lambert-St Louis

Mon 18/5

15:38-05:00

1 stop22h 22m

$1,595

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 8/5

09:00-17:21

2 stops23h 21m

Lambert-St Louis

Fri 15/5

18:11-10:35

2 stops25h 24m

$1,604

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 11/5

13:35-22:19

2 stops23h 44m

Lambert-St Louis

Mon 18/5

09:34-05:00

1 stop28h 26m

$1,631

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 31/7

10:55-18:17

1 stop22h 22m

Lambert-St Louis

Sun 6/9

13:18-08:15

2 stops27h 57m

$1,691

PerthChicago

PER - ORD

PERORD

Perth

Mon 1/6

23:55-15:52

2 stops28h 57m

Chicago O'Hare Intl

Tue 25/8

15:12-11:15

2 stops31h 03m

$2,055

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 35% 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	$724
Best Round-Trip Price	$1,314
Fastest flight time	29h 39m

The best one-way flight price to Illinois from Australia in the last 72 hours is $724 (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 $1,314 (Melbourne to Chicago O'Hare Intl).

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The fastest flight to Illinois from Australia takes 29h 39m (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 $83/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, 35% 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 March 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.