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 21h 09m and 21h 59m, respectively.

$859 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

2 May

MEL

24h 57m

2 stops

ORD

9 May

ORD

30h 00m

2 stops

MEL

$1,226

Multiple Airlines

1 May

BNE

26h 52m

2 stops

ORD

8 May

ORD

38h 20m

2 stops

BNE

$1,271

Air Canada

20 Apr

SYD

22h 15m

2 stops

ORD

30 Apr

ORD

24h 40m

1 stop

SYD

$1,272

Air Canada

20 Apr

SYD

25h 45m

2 stops

ORD

30 Apr

ORD

30h 30m

2 stops

SYD

$1,278

Multiple Airlines

29 Apr

MEL

25h 02m

2 stops

ORD

6 May

ORD

37h 35m

2 stops

MEL

$1,310

Air Canada

30 Apr

SYD

49h 48m

2 stops

ORD

7 May

ORD

24h 40m

1 stop

SYD

$1,312

Multiple Airlines

27 Apr

MEL

24h 57m

2 stops

ORD

4 May

ORD

30h 46m

2 stops

MEL

$1,317

Multiple Airlines

1 May

SYD

31h 20m

2 stops

ORD

8 May

ORD

49h 55m

2 stops

SYD

$1,317

Air Canada

28 Apr

BNE

24h 25m

2 stops

ORD

5 May

ORD

30h 10m

2 stops

BNE

$1,333

Air Canada

22 Apr

SYD

37h 40m

2 stops

ORD

26 Apr

ORD

43h 00m

2 stops

SYD

$1,333

Air Canada

30 Apr

SYD

25h 55m

1 stop

ORD

7 May

ORD

24h 40m

1 stop

SYD

$1,337

Air Canada

22 Apr

SYD

20h 25m

1 stop

ORD

26 Apr

ORD

43h 00m

2 stops

SYD

$1,360

Find the cheapest flights from Australia to Illinois

Round-trip

One-way

Last minute

Recent return flight deals from Australia to Illinois

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11:35 - 23:27

BNE

ORD

26h 52m

2 stops

05:15 - 10:35

ORD

BNE

38h 20m

2 stops

$1,271Multiple Airlines

Fri, 1 May - Fri, 8 May

09:20 - 16:35

SYD

ORD

22h 15m

2 stops

15:40 - 07:20

ORD

SYD

24h 40m

1 stop

$1,272Air Canada

Mon, 20 Apr - Thu, 30 Apr

09:20 - 20:05

SYD

ORD

25h 45m

2 stops

09:50 - 07:20

ORD

SYD

30h 30m

2 stops

$1,278Air Canada

Mon, 20 Apr - Thu, 30 Apr

13:35 - 19:30

MEL

STL

20h 55m

1 stop

06:21 - 06:45

STL

MEL

33h 24m

1 stop

$1,371Qantas Airways

Wed, 15 Apr - Wed, 22 Apr

13:35 - 22:59

MEL

STL

24h 24m

1 stop

14:37 - 06:45

STL

MEL

25h 08m

2 stops

$1,378American Airlines

Wed, 15 Apr - Wed, 22 Apr

13:35 - 19:30

MEL

STL

20h 55m

1 stop

12:27 - 05:00

STL

MEL

25h 33m

2 stops

$1,402American Airlines

Mon, 27 Apr - Mon, 4 May

10:55 - 18:24

MEL

STL

22h 29m

1 stop

08:30 - 08:15

STL

MEL

32h 45m

1 stop

$1,403United Airlines

Tue, 28 Apr - Tue, 5 May

13:35 - 19:30

MEL

STL

20h 55m

1 stop

15:38 - 05:00

STL

MEL

22h 22m

1 stop

$1,410Qantas Airways

Mon, 27 Apr - Mon, 4 May

10:55 - 22:28

MEL

STL

26h 33m

2 stops

08:21 - 07:30

STL

MEL

32h 09m

2 stops

$1,417United Airlines

Mon, 27 Apr - Mon, 4 May

11:55 - 10:07

SYD

STL

37h 12m

2 stops

15:02 - 08:45

STL

SYD

26h 43m

2 stops

$1,563Air New Zealand

Wed, 5 Aug - Sat, 29 Aug

Fly from

Route

Depart

Return

Price

Cheapest return flight

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Fri 1/5

11:35-23:27

2 stops26h 52m

Chicago O'Hare Intl

Fri 8/5

05:15-10:35

2 stops38h 20m

$1,271

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 20/4

09:20-16:35

2 stops22h 15m

Chicago O'Hare Intl

Thu 30/4

15:40-07:20

1 stop24h 40m

$1,272

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 20/4

09:20-20:05

2 stops25h 45m

Chicago O'Hare Intl

Thu 30/4

09:50-07:20

2 stops30h 30m

$1,278

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 15/4

13:35-19:30

1 stop20h 55m

Lambert-St Louis

Wed 22/4

06:21-06:45

1 stop33h 24m

$1,371

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 15/4

13:35-22:59

1 stop24h 24m

Lambert-St Louis

Wed 22/4

14:37-06:45

2 stops25h 08m

$1,378

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 27/4

13:35-19:30

1 stop20h 55m

Lambert-St Louis

Mon 4/5

12:27-05:00

2 stops25h 33m

$1,402

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Tue 28/4

10:55-18:24

1 stop22h 29m

Lambert-St Louis

Tue 5/5

08:30-08:15

1 stop32h 45m

$1,403

Fastest return journey

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 27/4

13:35-19:30

1 stop20h 55m

Lambert-St Louis

Mon 4/5

15:38-05:00

1 stop22h 22m

$1,410

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 27/4

10:55-22:28

2 stops26h 33m

Lambert-St Louis

Mon 4/5

08:21-07:30

2 stops32h 09m

$1,417

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

11:55-10:07

2 stops37h 12m

Lambert-St Louis

Sat 29/8

15:02-08:45

2 stops26h 43m

$1,563

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 36% 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

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Cheap Illinois flight deals and tips

Summary info about Illinois flight prices, duration and airlines

Best One-Way Price	$859
Best Round-Trip Price	$1,271
Fastest flight time	23h 28m

The best one-way flight price to Illinois from Australia in the last 72 hours is $859 (Melbourne 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 $1,271 (Brisbane to Chicago O'Hare Intl).

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The fastest flight to Illinois from Australia takes 23h 28m (Sydney Kingsford Smith 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 $81/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $819/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, 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 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.