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 23h 13m and 22h 38m, respectively.

$708 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

8 Sept

SYD

39h 02m

2 stops

ORD

22 Sept

ORD

49h 05m

3 stops

SYD

$1,164

Multiple Airlines

8 Sept

SYD

32h 02m

2 stops

ORD

22 Sept

ORD

48h 55m

3 stops

SYD

$1,188

Multiple Airlines

8 Sept

SYD

32h 02m

2 stops

ORD

14 Sept

ORD

38h 20m

3 stops

SYD

$1,199

Multiple Airlines

25 Aug

SYD

32h 02m

2 stops

ORD

1 Sept

ORD

46h 05m

3 stops

SYD

$1,215

Multiple Airlines

25 Aug

SYD

32h 02m

2 stops

ORD

1 Sept

ORD

46h 05m

3 stops

SYD

$1,218

Multiple Airlines

9 Sept

SYD

35h 05m

3 stops

ORD

19 Sept

ORD

38h 30m

3 stops

SYD

$1,261

Air Canada

15 Oct

BNE

36h 51m

2 stops

ORD

28 Oct

ORD

32h 05m

2 stops

BNE

$1,265

Air Canada

15 Oct

BNE

36h 51m

2 stops

ORD

28 Oct

ORD

25h 15m

1 stop

BNE

$1,266

Air Canada

17 Aug

SYD

39h 56m

2 stops

ORD

31 Aug

ORD

31h 30m

2 stops

SYD

$1,280

Air Canada

15 Oct

BNE

19h 43m

1 stop

ORD

28 Oct

ORD

25h 15m

1 stop

BNE

$1,292

Multiple Airlines

25 Aug

SYD

32h 02m

2 stops

ORD

1 Sept

ORD

46h 05m

3 stops

SYD

$1,295

Air Canada

17 Aug

SYD

20h 16m

1 stop

ORD

31 Aug

ORD

24h 40m

1 stop

SYD

$1,307

Flights to Moline

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United Airlines

15 Sept

BNE

43h 44m

2 stops

MLI

10 Oct

MLI

56h 58m

2 stops

BNE

$1,655

American Airlines

14 Sept

BNE

34h 28m

2 stops

MLI

11 Oct

MLI

31h 00m

2 stops

BNE

$1,656

United Airlines

16 Sept

BNE

25h 31m

2 stops

MLI

6 Oct

MLI

56h 58m

2 stops

BNE

$1,665

American Airlines

14 Sept

BNE

30h 03m

2 stops

MLI

12 Oct

MLI

44h 55m

2 stops

BNE

$1,690

American Airlines

14 Sept

BNE

31h 18m

2 stops

MLI

10 Oct

MLI

56h 00m

2 stops

BNE

$1,692

American Airlines

17 Sept

BNE

23h 33m

2 stops

MLI

11 Oct

MLI

31h 00m

2 stops

BNE

$1,702

American Airlines

17 Sept

BNE

23h 33m

2 stops

MLI

10 Oct

MLI

56h 00m

2 stops

BNE

$1,710

United Airlines

18 Sept

BNE

48h 16m

2 stops

MLI

10 Oct

MLI

56h 58m

2 stops

BNE

$1,729

American Airlines

17 Sept

BNE

23h 33m

2 stops

MLI

12 Oct

MLI

44h 55m

2 stops

BNE

$1,730

American Airlines

14 Sept

BNE

34h 52m

2 stops

MLI

10 Oct

MLI

31h 00m

2 stops

BNE

$1,737

American Airlines

14 Sept

BNE

30h 03m

2 stops

MLI

9 Oct

MLI

44h 57m

2 stops

BNE

$1,739

United Airlines

18 Sept

BNE

48h 16m

2 stops

MLI

11 Oct

MLI

32h 58m

2 stops

BNE

$1,740

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.

06:15 - 06:17

SYD

ORD

39h 02m

2 stops

06:20 - 22:25

ORD

SYD

49h 05m

3 stops

$1,164Multiple Airlines

Tue, 8 Sep - Tue, 22 Sep

13:15 - 06:17

SYD

ORD

32h 02m

2 stops

06:30 - 22:25

ORD

SYD

48h 55m

3 stops

$1,188Multiple Airlines

Tue, 8 Sep - Tue, 22 Sep

10:00 - 07:51

BNE

ORD

36h 51m

2 stops

08:40 - 07:45

ORD

BNE

32h 05m

2 stops

$1,265Air Canada

Thu, 15 Oct - Wed, 28 Oct

10:00 - 07:51

BNE

ORD

36h 51m

2 stops

15:30 - 07:45

ORD

BNE

25h 15m

1 stop

$1,266Air Canada

Thu, 15 Oct - Wed, 28 Oct

09:45 - 15:54

MEL

ORD

21h 09m

1 stop

15:20 - 06:45

ORD

MEL

24h 25m

1 stop

$1,360Qantas Airways

Tue, 25 Aug - Fri, 18 Sep

17:25 - 05:13

MEL

ORD

26h 48m

2 stops

15:20 - 06:45

ORD

MEL

24h 25m

1 stop

$1,431Qantas Airways

Tue, 25 Aug - Fri, 18 Sep

11:20 - 23:45

SYD

STL

29h 25m

1 stop

06:02 - 09:00

STL

SYD

33h 58m

1 stop

$1,481American Airlines

Mon, 2 Nov - Mon, 16 Nov

11:20 - 18:15

SYD

STL

23h 55m

2 stops

06:02 - 09:00

STL

SYD

33h 58m

1 stop

$1,481American Airlines

Mon, 2 Nov - Mon, 16 Nov

09:20 - 14:13

SYD

STL

21h 53m

1 stop

17:55 - 07:00

STL

SYD

44h 05m

1 stop

$1,497United Airlines

Thu, 12 Nov - Mon, 16 Nov

09:20 - 14:13

SYD

STL

21h 53m

1 stop

17:55 - 09:05

STL

SYD

46h 10m

2 stops

$1,497United Airlines

Thu, 12 Nov - Mon, 16 Nov

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 8/9

06:15-06:17

2 stops39h 02m

Chicago O'Hare Intl

Tue 22/9

06:20-22:25

3 stops49h 05m

$1,164

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 8/9

13:15-06:17

2 stops32h 02m

Chicago O'Hare Intl

Tue 22/9

06:30-22:25

3 stops48h 55m

$1,188

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 15/10

10:00-07:51

2 stops36h 51m

Chicago O'Hare Intl

Wed 28/10

08:40-07:45

2 stops32h 05m

$1,265

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 15/10

10:00-07:51

2 stops36h 51m

Chicago O'Hare Intl

Wed 28/10

15:30-07:45

1 stop25h 15m

$1,266

Fastest return journey

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Tue 25/8

09:45-15:54

1 stop21h 09m

Chicago O'Hare Intl

Fri 18/9

15:20-06:45

1 stop24h 25m

$1,360

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Tue 25/8

17:25-05:13

2 stops26h 48m

Chicago O'Hare Intl

Fri 18/9

15:20-06:45

1 stop24h 25m

$1,431

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 2/11

11:20-23:45

1 stop29h 25m

Lambert-St Louis

Mon 16/11

06:02-09:00

1 stop33h 58m

$1,481

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 2/11

11:20-18:15

2 stops23h 55m

Lambert-St Louis

Mon 16/11

06:02-09:00

1 stop33h 58m

$1,481

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,497

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-09:05

2 stops46h 10m

$1,497

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 Canada 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 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	$708
Best Round-Trip Price	$1,164
Fastest flight time	28h 21m

The best one-way flight price to Illinois from Australia in the last 5 days is $708 (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 $1,164 (Sydney Kingsford Smith to Chicago O'Hare Intl).

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The fastest flight to Illinois from Australia takes 28h 21m (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 $134/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $709/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, Air New Zealand and Air Canada happen to be the most popular among our users. In the past year, 30% 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 August 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.