How long is the flight from Australia to Illinois?

If you’re flying from a popular airport in Australia, such as Sydney or Melbourne, and flying into Illinois, then you can expect flight times to average 22h 50m and 24h 35m, respectively.

What is the cheapest airline that flies from Australia to Illinois?

Delta, Philippine Airlines, and Cathay Pacific are the most popular carriers operating from Australia to Illinois

Which airlines fly to Illinois?

Qantas Airways, American Airlines 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 41% 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.

When did momondo last update prices for flights from Australia to Illinois?

Prices for flights from Australia to Illinois are updated daily.

How many operators does momondo search for flights from Australia to Illinois?

As of November 2026, there are 7 operators available to choose from for flights from Australia to Illinois.

How old do you have to be to fly from Australia to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Australia 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.

$614 Cheap Flights from Australia to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

11:20 - 22:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 35m1 stop Los Angeles

18:46 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 14m1 stop Los Angeles

$1,048American Airlines

Thu, 18 Feb - Mon, 22 Feb

09:15 - 16:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 22m2 stops Los Angeles Atlanta Hartsfield-Jackson

17:55 - 06:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

45h 55m2 stops Atlanta Hartsfield-Jackson Los Angeles

$1,054Delta

Mon, 26 Apr - Sat, 8 May

10:40 - 23:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

07:45 - 08:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 45m1 stop Los Angeles

$1,054Delta

Mon, 16 Nov - Mon, 30 Nov

11:10 - 16:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 55m1 stop Los Angeles

21:03 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$1,079Qantas Airways

Mon, 16 Nov - Mon, 30 Nov

14:05 - 14:18SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 13m1 stop Dallas/Fort Worth

16:59 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 01m1 stop Los Angeles

$1,093Qantas Airways

Thu, 18 Feb - Mon, 22 Feb

11:15 - 16:42SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 27m1 stop Los Angeles

17:15 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 45m1 stop Los Angeles

$1,115Multiple Airlines

Thu, 26 Nov - Thu, 3 Dec

11:10 - 17:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 49m1 stop Los Angeles

17:15 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 45m1 stop Los Angeles

$1,118American Airlines

Mon, 16 Nov - Thu, 3 Dec

11:30 - 16:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 25m1 stop Manila Ninoy Aquino Intl

22:45 - 09:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 05m1 stop Manila Ninoy Aquino Intl

$1,460Philippine Airlines

Thu, 19 Nov - Fri, 4 Dec

12:10 - 19:55MEL Melbourne-ORD Chicago O'Hare Intl

24h 45m2 stops Auckland Intl Houston George Bush Intcntl

14:22 - 08:55ORD Chicago O'Hare Intl-MEL Melbourne

25h 33m2 stops Houston George Bush Intcntl Auckland Intl

$1,783Air New Zealand

Tue, 17 Nov - Tue, 8 Dec

14:05 - 22:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 55m2 stops Auckland Intl Los Angeles

12:55 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 40m2 stops Los Angeles Auckland Intl

$1,840Air New Zealand

Thu, 19 Nov - Fri, 4 Dec

Recent last minute flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

11:10 - 17:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 50m1 stop Los Angeles

18:45 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 15m1 stop Los Angeles

$1,046Qantas Airways

Wed, 4 Nov - Wed, 11 Nov

11:10 - 17:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 49m1 stop Los Angeles

21:03 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$1,049American Airlines

Mon, 9 Nov - Mon, 23 Nov

11:10 - 12:21SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

42h 11m1 stop Los Angeles

13:26 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 34m2 stops Phoenix Sky Harbor Intl Los Angeles

$1,051American Airlines

Mon, 9 Nov - Mon, 23 Nov

10:40 - 21:47SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 07m2 stops Los Angeles Salt Lake City

11:19 - 08:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 11m2 stops Detroit Metropolitan Wayne County Los Angeles

$1,054Delta

Mon, 9 Nov - Mon, 23 Nov

10:40 - 23:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

14:32 - 08:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 58m1 stop Los Angeles

$1,054Delta

Mon, 9 Nov - Mon, 23 Nov

14:00 - 05:13SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

12:05 - 12:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi

$1,554Multiple Airlines

Mon, 9 Nov - Mon, 23 Nov

14:00 - 05:13SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

12:05 - 12:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 30m3 stops Phoenix Sky Harbor Intl Los Angeles Nadi

$1,562Multiple Airlines

Mon, 9 Nov - Mon, 23 Nov

06:00 - 22:30ADL Adelaide-ORD Chicago O'Hare Intl

33h 00m2 stops Sydney Kingsford Smith Los Angeles

15:25 - 16:35ORD Chicago O'Hare Intl-ADL Adelaide

32h 40m2 stops Los Angeles Sydney Kingsford Smith

$1,805Qantas Airways

Thu, 5 Nov - Mon, 9 Nov

12:15 - 12:30BNE Brisbane-ORD Chicago O'Hare Intl

40h 15m1 stop Hong Kong Intl

14:10 - 10:45ORD Chicago O'Hare Intl-BNE Brisbane

28h 35m1 stop Hong Kong Intl

$1,977Cathay Pacific

Thu, 5 Nov - Mon, 9 Nov

12:15 - 12:30BNE Brisbane-ORD Chicago O'Hare Intl

40h 15m1 stop Hong Kong Intl

14:10 - 10:45ORD Chicago O'Hare Intl-BNE Brisbane

28h 35m1 stop Hong Kong Intl

$1,979Cathay Pacific

Thu, 5 Nov - Mon, 9 Nov

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Qantas Airways flights from Australia to Illinois

Our best Qantas Airways deals on Australia to Illinois flight tickets

Qantas Airways

4 Nov

SYD11:10Sydney Kingsford Smith

22h 50m

1 stop

ORD17:00Chicago O'Hare Intl

11 Nov

ORD18:45Chicago O'Hare Intl

21h 15m

1 stop

SYD09:00Sydney Kingsford Smith

$1,046

Qantas Airways

16 Nov

SYD11:10Sydney Kingsford Smith

21h 55m

1 stop

ORD16:05Chicago O'Hare Intl

30 Nov

ORD21:03Chicago O'Hare Intl

42h 57m

1 stop

SYD09:00Sydney Kingsford Smith

$1,079

Qantas Airways

18 Feb

SYD14:05Sydney Kingsford Smith

41h 13m

1 stop

ORD14:18Chicago O'Hare Intl

22 Feb

ORD16:59Chicago O'Hare Intl

23h 01m

1 stop

SYD09:00Sydney Kingsford Smith

$1,093

Delta flights from Australia to Illinois

Our best Delta deals on Australia to Illinois flight tickets

Delta

9 Nov

SYD10:40Sydney Kingsford Smith

30h 15m

1 stop

ORD23:55Chicago O'Hare Intl

23 Nov

ORD14:32Chicago O'Hare Intl

24h 58m

1 stop

SYD08:30Sydney Kingsford Smith

$1,054

Delta

20 Jan

SYD10:40Sydney Kingsford Smith

25h 08m

2 stops

ORD18:48Chicago O'Hare Intl

31 Jan

ORD12:42Chicago O'Hare Intl

25h 08m

2 stops

SYD06:50Sydney Kingsford Smith

$1,055

Delta

9 Nov

SYD10:40Sydney Kingsford Smith

24h 50m

2 stops

ORD18:30Chicago O'Hare Intl

23 Nov

ORD08:29Chicago O'Hare Intl

31h 01m

2 stops

SYD08:30Sydney Kingsford Smith

$1,056

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 18/2

11:20-22:55

1 stop28h 35m

Chicago O'Hare Intl

Mon 22/2

18:46-09:00

1 stop21h 14m

$1,048

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 26/4

09:15-16:37

2 stops46h 22m

Chicago O'Hare Intl

Sat 8/5

17:55-06:50

2 stops45h 55m

$1,054

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 16/11

10:40-23:55

1 stop30h 15m

Chicago O'Hare Intl

Mon 30/11

07:45-08:30

1 stop31h 45m

$1,054

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 16/11

11:10-16:05

1 stop21h 55m

Chicago O'Hare Intl

Mon 30/11

21:03-09:00

1 stop42h 57m

$1,079

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 18/2

14:05-14:18

1 stop41h 13m

Chicago O'Hare Intl

Mon 22/2

16:59-09:00

1 stop23h 01m

$1,093

Fastest return journey

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 26/11

11:15-16:42

1 stop22h 27m

Chicago O'Hare Intl

Thu 3/12

17:15-09:00

1 stop22h 45m

$1,115

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 16/11

11:10-17:59

1 stop23h 49m

Chicago O'Hare Intl

Thu 3/12

17:15-09:00

1 stop22h 45m

$1,118

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 19/11

11:30-16:55

1 stop46h 25m

Chicago O'Hare Intl

Fri 4/12

22:45-09:50

1 stop42h 05m

$1,460

MelbourneChicago

MEL Melbourne - ORD Chicago O'Hare Intl

MELORD

Melbourne

Tue 17/11

12:10-19:55

2 stops24h 45m

Chicago O'Hare Intl

Tue 8/12

14:22-08:55

2 stops25h 33m

$1,783

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 19/11

14:05-22:00

2 stops24h 55m

Chicago O'Hare Intl

Fri 4/12

12:55-10:35

2 stops28h 40m

$1,840

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Australia to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

In general, March is the cheapest month to fly from Australia to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,635. If you’re not able to fly to Illinois in March, then May is your next best option. Flight prices from Australia to Illinois during May average around $1,651.

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Australia when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $2,090 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Australia for as low as $1,247 on momondo.

Can stopping save me money on Australia to Illinois flights?

You could potentially save up to 25% on your flight if you consider stops on a Australia to Illinois flight.

Cheap Australia to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Australia to Illinois

Best price found	$614
Fastest flight time	22h 14m
Direct flights	None

The best one-way flight to Illinois from Australia in the past 72 hours is $614. The best return flight deal from Australia to Illinois found on momondo in the last 72 hours is $1,048.

The fastest flight from Australia to Illinois takes 22h 14m

There are no direct flights from Australia to Illinois. There are no popular flight routes from Australia to Illinois.

Search flight deals

Frequently asked questions about flying from Australia to Illinois

When did momondo last update prices for flights from Australia to Illinois?
Prices for flights from Australia to Illinois are updated daily.
How many operators does momondo search for flights from Australia to Illinois?
As of November 2026, there are 7 operators available to choose from for flights from Australia to Illinois.
How old do you have to be to fly from Australia to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Australia 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.

Best airlines flying from Australia to Illinois

Compare and see reviews for airlines that fly from Australia to Illinois with momondo

Airline	Rating	Free cancellation	Price
American Airlines	PriceFrom $548	Free cancellation	Rating 7.0 12,230 reviews	Search American Airlines flights
Air Canada	PriceFrom $954	Free cancellation	Rating 7.1 11,852 reviews	Search Air Canada flights
Delta	PriceFrom $1,054	Free cancellation	Rating 7.8 8,696 reviews	Search Delta flights
Air New Zealand	PriceFrom $1,225	Free cancellation	Rating 8.0 681 reviews	Search Air New Zealand flights
United Airlines	PriceFrom $1,297	Free cancellation	Rating 7.3 10,458 reviews	Search United Airlines flights
Qantas Airways	PriceFrom $1,336	Free cancellation	Rating 7.5 1,122 reviews	Search Qantas Airways flights
Cathay Pacific	PriceFrom $1,696	Free cancellation	Rating 7.6 1,537 reviews	Search Cathay Pacific flights
Virgin Australia	PriceFrom $2,165	Free cancellation	Rating 7.6 484 reviews	Search Virgin Australia flights

Why use momondo?

Why should I use momondo to find a flight deal from Australia to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Australia to Illinois . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Australia to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Australia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Australia 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 help filter your options to help you make an informed choice when booking flights to Illinois from Australia.

I’m not ready to book a flight from Australia to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Australia to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.