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 39m and 22h 34m, respectively.

$864 Cheap Flights to Illinois in 2026

Look for other cheap flights to Illinois

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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

12 Aug

SYD

39h 12m

2 stops

ORD

19 Aug

ORD

35h 30m

3 stops

SYD

$1,287

Multiple Airlines

12 Aug

SYD

39h 12m

2 stops

ORD

19 Aug

ORD

35h 30m

3 stops

SYD

$1,292

Qantas Airways

5 Aug

MEL

25h 15m

1 stop

ORD

17 Aug

ORD

24h 23m

1 stop

MEL

$1,304

Multiple Airlines

11 Aug

SYD

32h 02m

2 stops

ORD

18 Aug

ORD

35h 30m

3 stops

SYD

$1,307

Qantas Airways

3 Aug

MEL

25h 23m

1 stop

ORD

22 Aug

ORD

27h 56m

1 stop

MEL

$1,309

Qantas Airways

10 Aug

MEL

25h 15m

1 stop

ORD

29 Aug

ORD

27h 56m

1 stop

MEL

$1,316

Qantas Airways

14 Aug

MEL

25h 15m

1 stop

ORD

21 Aug

ORD

42h 39m

1 stop

MEL

$1,319

Qantas Airways

2 Aug

MEL

27h 37m

1 stop

ORD

19 Aug

ORD

42h 39m

1 stop

MEL

$1,320

Qantas Airways

3 Aug

MEL

21h 09m

1 stop

ORD

29 Aug

ORD

22h 29m

1 stop

MEL

$1,324

Multiple Airlines

15 Aug

MEL

21h 09m

1 stop

ORD

11 Sept

ORD

24h 25m

1 stop

MEL

$1,327

Qantas Airways

3 Aug

MEL

23h 27m

1 stop

ORD

22 Aug

ORD

28h 45m

1 stop

MEL

$1,336

American Airlines

3 Aug

MEL

28h 15m

1 stop

ORD

22 Aug

ORD

24h 23m

1 stop

MEL

$1,340

Flights to Moline

Search all flight deals to Moline

United Airlines

25 Nov

BNE

22h 03m

2 stops

MLI

19 Jan

MLI

45h 48m

2 stops

BNE

$1,856

American Airlines

3 Nov

BNE

52h 22m

2 stops

MLI

22 Jan

MLI

51h 09m

2 stops

BNE

$1,934

American Airlines

25 Nov

BNE

21h 24m

1 stop

MLI

19 Jan

MLI

27h 09m

2 stops

BNE

$2,266

American Airlines

3 Nov

BNE

52h 22m

2 stops

MLI

19 Jan

MLI

50h 29m

2 stops

BNE

$2,332

American Airlines

25 Nov

BNE

41h 00m

1 stop

MLI

19 Jan

MLI

22h 32m

1 stop

BNE

$2,336

American Airlines

3 Nov

BNE

21h 24m

1 stop

MLI

19 Jan

MLI

27h 30m

1 stop

BNE

$2,340

American Airlines

3 Nov

BNE

21h 24m

1 stop

MLI

21 Jan

MLI

26h 50m

2 stops

BNE

$2,412

American Airlines

3 Nov

BNE

21h 24m

1 stop

MLI

16 Jan

MLI

45h 27m

2 stops

BNE

$2,415

American Airlines

3 Nov

BNE

24h 52m

2 stops

MLI

17 Jan

MLI

27h 09m

2 stops

BNE

$2,636

Multiple Airlines

3 Nov

BNE

45h 09m

3 stops

MLI

17 Jan

MLI

38h 57m

2 stops

BNE

$3,642

Multiple Airlines

25 Nov

BNE

45h 50m

3 stops

MLI

19 Jan

MLI

38h 09m

2 stops

BNE

$4,063

Emirates

13 Aug

BNE

37h 31m

2 stops

MLI

20 Aug

MLI

47h 41m

2 stops

BNE

$5,168

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.

06:05 - 06:17

SYD

ORD

39h 12m

2 stops

09:20 - 11:50

ORD

SYD

35h 30m

3 stops

$1,287Multiple Airlines

Wed, 12 Aug - Wed, 19 Aug

06:05 - 06:17

SYD

ORD

39h 12m

2 stops

09:20 - 11:50

ORD

SYD

35h 30m

3 stops

$1,292Multiple Airlines

Wed, 12 Aug - Wed, 19 Aug

09:45 - 20:00

MEL

ORD

25h 15m

1 stop

15:22 - 06:45

ORD

MEL

24h 23m

1 stop

$1,304Qantas Airways

Wed, 5 Aug - Mon, 17 Aug

09:45 - 20:08

MEL

ORD

25h 23m

1 stop

11:49 - 06:45

ORD

MEL

27h 56m

1 stop

$1,309Qantas Airways

Mon, 3 Aug - Sat, 22 Aug

09:30 - 16:34

SYD

STL

22h 04m

2 stops

12:59 - 07:00

STL

SYD

27h 01m

2 stops

$1,506United Airlines

Tue, 25 Aug - Thu, 10 Sep

20:45 - 20:24

MEL

STL

38h 39m

3 stops

08:55 - 11:35

STL

MEL

35h 40m

3 stops

$1,704Air Canada

Thu, 6 Aug - Mon, 10 Aug

20:45 - 20:24

MEL

STL

38h 39m

3 stops

08:55 - 11:35

STL

MEL

35h 40m

3 stops

$1,710Air Canada

Thu, 6 Aug - Mon, 10 Aug

09:40 - 00:59

BNE

ORD

30h 19m

2 stops

16:20 - 11:05

ORD

BNE

27h 45m

2 stops

$1,743Air New Zealand

Mon, 24 Aug - Mon, 31 Aug

09:30 - 16:37

MEL

STL

22h 07m

2 stops

09:04 - 09:15

STL

MEL

32h 11m

2 stops

$1,800United Airlines

Wed, 30 Sep - Wed, 7 Oct

11:55 - 21:30

OOL

ORD

24h 35m

2 stops

15:48 - 10:45

ORD

OOL

27h 57m

2 stops

$2,104Air New Zealand

Sun, 30 Aug - Sun, 6 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 12/8

06:05-06:17

2 stops39h 12m

Chicago O'Hare Intl

Wed 19/8

09:20-11:50

3 stops35h 30m

$1,287

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 12/8

06:05-06:17

2 stops39h 12m

Chicago O'Hare Intl

Wed 19/8

09:20-11:50

3 stops35h 30m

$1,292

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Wed 5/8

09:45-20:00

1 stop25h 15m

Chicago O'Hare Intl

Mon 17/8

15:22-06:45

1 stop24h 23m

$1,304

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Mon 3/8

09:45-20:08

1 stop25h 23m

Chicago O'Hare Intl

Sat 22/8

11:49-06:45

1 stop27h 56m

$1,309

Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/8

09:30-16:34

2 stops22h 04m

Lambert-St Louis

Thu 10/9

12:59-07:00

2 stops27h 01m

$1,506

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

20:45-20:24

3 stops38h 39m

Lambert-St Louis

Mon 10/8

08:55-11:35

3 stops35h 40m

$1,704

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

20:45-20:24

3 stops38h 39m

Lambert-St Louis

Mon 10/8

08:55-11:35

3 stops35h 40m

$1,710

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Mon 24/8

09:40-00:59

2 stops30h 19m

Chicago O'Hare Intl

Mon 31/8

16:20-11:05

2 stops27h 45m

$1,743

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 30/9

09:30-16:37

2 stops22h 07m

Lambert-St Louis

Wed 7/10

09:04-09:15

2 stops32h 11m

$1,800

CoolangattaChicago

OOL - ORD

OOLORD

Coolangatta Gold Coast

Sun 30/8

11:55-21:30

2 stops24h 35m

Chicago O'Hare Intl

Sun 6/9

15:48-10:45

2 stops27h 57m

$2,104

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 New Zealand 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 30% 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	$864
Best Round-Trip Price	$1,287
Fastest flight time	24h 22m

The best one-way flight price to Illinois from Australia in the last 5 days is $864 (Sydney Kingsford Smith to Lambert-St Louis).

Search Deals

The best return flight price to Illinois from Australia in the last 5 days is $1,287 (Sydney Kingsford Smith to Chicago O'Hare Intl).

Search Deals

The fastest flight to Illinois from Australia takes 24h 22m (Sydney Kingsford Smith to Lambert-St Louis).

Search Deals

Frequently asked questions about flying to Illinois

What is the cheapest flight I can find to Illinois?

For prices as low as $132/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $688/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 9 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 9 as of July 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.