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 13m and 21h 04m, respectively.

$858 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

11 Aug

MEL

31h 52m

2 stops

ORD

17 Aug

ORD

42h 32m

1 stop

MEL

$1,739

Multiple Airlines

18 May

SYD

27h 49m

1 stop

ORD

24 May

ORD

43h 44m

1 stop

SYD

$1,820

Multiple Airlines

9 Aug

SYD

32h 02m

2 stops

ORD

28 Aug

ORD

43h 23m

1 stop

SYD

$1,831

Multiple Airlines

19 May

SYD

27h 49m

1 stop

ORD

3 June

ORD

34h 30m

2 stops

SYD

$1,841

Multiple Airlines

18 May

SYD

27h 49m

1 stop

ORD

29 May

ORD

43h 44m

1 stop

SYD

$1,896

Qatar Airways

11 Aug

MEL

36h 19m

2 stops

ORD

19 Aug

ORD

30h 30m

1 stop

MEL

$1,922

Multiple Airlines

25 May

SYD

27h 44m

1 stop

ORD

12 Oct

ORD

26h 28m

2 stops

SYD

$1,926

Multiple Airlines

25 May

SYD

27h 44m

1 stop

ORD

10 Oct

ORD

33h 25m

2 stops

SYD

$1,934

Multiple Airlines

27 May

SYD

27h 44m

1 stop

ORD

12 Oct

ORD

26h 28m

2 stops

SYD

$1,967

Multiple Airlines

1 June

MEL

37h 10m

2 stops

ORD

15 June

ORD

32h 25m

2 stops

MEL

$1,976

Multiple Airlines

27 May

SYD

27h 44m

1 stop

ORD

10 Oct

ORD

33h 25m

2 stops

SYD

$1,976

Multiple Airlines

29 May

SYD

27h 44m

1 stop

ORD

5 June

ORD

32h 50m

2 stops

SYD

$1,977

Flights to Moline

Search all flight deals to Moline

American Airlines

23 July

BNE

29h 38m

2 stops

MLI

6 Aug

MLI

26h 21m

2 stops

BNE

$2,770

Multiple Airlines

23 July

BNE

23h 13m

2 stops

MLI

6 Aug

MLI

31h 26m

3 stops

BNE

$2,830

Multiple Airlines

23 July

BNE

27h 24m

3 stops

MLI

6 Aug

MLI

31h 26m

3 stops

BNE

$2,979

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.

09:45 - 23:56

MEL

STL

29h 11m

1 stop

14:37 - 06:45

STL

MEL

25h 08m

2 stops

$1,547American Airlines

Thu, 28 May - Thu, 4 Jun

09:45 - 21:37

MEL

STL

26h 52m

2 stops

13:45 - 06:45

STL

MEL

26h 00m

2 stops

$1,572American Airlines

Sun, 14 Jun - Sun, 21 Jun

09:45 - 23:56

MEL

STL

29h 11m

1 stop

19:24 - 05:00

STL

MEL

42h 36m

1 stop

$1,575Qantas Airways

Sun, 14 Jun - Sun, 21 Jun

09:20 - 20:25

SYD

STL

50h 05m

2 stops

13:20 - 07:20

STL

SYD

51h 00m

2 stops

$1,667Air Canada

Sun, 14 Jun - Sun, 21 Jun

09:20 - 20:25

SYD

STL

50h 05m

3 stops

13:20 - 07:20

STL

SYD

51h 00m

2 stops

$1,678Air Canada

Sun, 14 Jun - Sun, 21 Jun

10:20 - 18:17

SYD

STL

22h 57m

1 stop

16:48 - 06:55

STL

SYD

23h 07m

2 stops

$1,707United Airlines

Tue, 2 Jun - Tue, 9 Jun

10:55 - 19:31

MEL

STL

23h 36m

2 stops

13:27 - 08:15

STL

MEL

27h 48m

2 stops

$2,008United Airlines

Mon, 7 Sep - Sun, 27 Sep

18:00 - 06:01

MEL

ORD

27h 01m

2 stops

08:05 - 06:45

ORD

MEL

31h 40m

1 stop

$2,040Qantas Airways

Sun, 31 May - Sun, 7 Jun

11:55 - 21:46

ADL

ORD

25h 21m

2 stops

14:15 - 10:55

ORD

ADL

28h 10m

2 stops

$2,406Air New Zealand

Wed, 28 Oct - Wed, 2 Dec

19:50 - 21:37

PER

ORD

38h 47m

2 stops

17:45 - 16:00

ORD

PER

33h 15m

2 stops

$2,556Air New Zealand

Wed, 12 Aug - Wed, 16 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 28/5

09:45-23:56

1 stop29h 11m

Lambert-St Louis

Thu 4/6

14:37-06:45

2 stops25h 08m

$1,547

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 14/6

09:45-21:37

2 stops26h 52m

Lambert-St Louis

Sun 21/6

13:45-06:45

2 stops26h 00m

$1,572

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 14/6

09:45-23:56

1 stop29h 11m

Lambert-St Louis

Sun 21/6

19:24-05:00

1 stop42h 36m

$1,575

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 14/6

09:20-20:25

2 stops50h 05m

Lambert-St Louis

Sun 21/6

13:20-07:20

2 stops51h 00m

$1,667

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 14/6

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Sun 21/6

13:20-07:20

2 stops51h 00m

$1,678

Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/6

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Tue 9/6

16:48-06:55

2 stops23h 07m

$1,707

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/9

10:55-19:31

2 stops23h 36m

Lambert-St Louis

Sun 27/9

13:27-08:15

2 stops27h 48m

$2,008

MelbourneChicago

MEL - ORD

MELORD

Melbourne

Sun 31/5

18:00-06:01

2 stops27h 01m

Chicago O'Hare Intl

Sun 7/6

08:05-06:45

1 stop31h 40m

$2,040

AdelaideChicago

ADL - ORD

ADLORD

Adelaide

Wed 28/10

11:55-21:46

2 stops25h 21m

Chicago O'Hare Intl

Wed 2/12

14:15-10:55

2 stops28h 10m

$2,406

PerthChicago

PER - ORD

PERORD

Perth

Wed 12/8

19:50-21:37

2 stops38h 47m

Chicago O'Hare Intl

Wed 16/9

17:45-16:00

2 stops33h 15m

$2,556

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 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	$858
Best Round-Trip Price	$1,547
Fastest flight time	22h 18m

The best one-way flight price to Illinois from Australia in the last 72 hours is $858 (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 $1,547 (Melbourne to Lambert-St Louis).

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The fastest flight to Illinois from Australia takes 22h 18m (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 $71/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $745/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, United Airlines and Air Canada 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 May 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.