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

Delta, Cathay Pacific, and Qatar Airways are the most popular carriers operating from Australia to Illinois

How long is the flight from Australia to Illinois?

The flight from Australia to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Melbourne (a popular airport in Australia) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 20h 54m on average. If you fly from Sydney (another popular airport in Australia) to Chicago O'Hare Intl Airport, then the average flight time is 21h 42m.

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

Prices for flights from Australia to Illinois were last updated today.

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

There is 1 operator available for flights from Australia to Illinois as of November 2026.

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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 license, 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.

$431 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

Round-trip

One-way

Last minute

Recent round-trip flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

11:20 am - 10:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 35m1 stop Los Angeles

6:46 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 14m1 stop Los Angeles

$735American Airlines

Thu, Feb 18 - Mon, Feb 22

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

7:45 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 45m1 stop Los Angeles

$739Delta

Mon, Nov 16 - Mon, Nov 30

9:15 am - 4:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 22m2 stops Los Angeles Atlanta Hartsfield-Jackson

5:55 pm - 6:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

45h 55m2 stops Atlanta Hartsfield-Jackson Los Angeles

$739Delta

Mon, Apr 26 - Sat, May 8

11:10 am - 4:05 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 55m1 stop Los Angeles

9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$757Qantas Airways

Mon, Nov 16 - Mon, Nov 30

2:05 pm - 2:18 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 13m1 stop Dallas/Fort Worth

4:59 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 01m1 stop Los Angeles

$767Qantas Airways

Thu, Feb 18 - Mon, Feb 22

10:20 am - 4:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 35m1 stop Los Angeles

8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 40m1 stop Los Angeles

$769Qantas Airways

Tue, Apr 27 - Sat, May 8

12:00 pm - 7:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 55m1 stop Dallas/Fort Worth

8:50 pm - 6:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 40m1 stop Los Angeles

$769Qantas Airways

Mon, Apr 26 - Sat, May 8

11:15 am - 4:42 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 27m1 stop Los Angeles

5:15 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 45m1 stop Los Angeles

$782Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

11:10 am - 5:11 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 01m1 stop Los Angeles

1:30 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 30m1 stop Los Angeles

$784American Airlines

Sat, Nov 21 - Sun, Dec 6

11:10 am - 4:54 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 44m1 stop Los Angeles

4:59 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 01m1 stop Los Angeles

$784American Airlines

Mon, Feb 1 - Sat, Feb 20

Recent last minute flight deals from Australia to Illinois

Enter your travel dates to find the best prices.

11:10 am - 5:59 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 49m1 stop Los Angeles

9:03 pm - 9:00 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 57m1 stop Los Angeles

$736American Airlines

Mon, Nov 9 - Mon, Nov 23

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

7:30 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

32h 00m2 stops Salt Lake City Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

10:40 am - 11:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 15m1 stop Los Angeles

2:32 pm - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 58m1 stop Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

10:40 am - 9:47 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

28h 07m2 stops Los Angeles Salt Lake City

11:19 am - 8:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 11m2 stops Detroit Metropolitan Wayne County Los Angeles

$739Delta

Mon, Nov 9 - Mon, Nov 23

2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

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

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

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

$1,090Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

2:00 pm - 5:13 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

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

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

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

$1,096Multiple Airlines

Mon, Nov 9 - Mon, Nov 23

12:45 am - 12:30 pmMEL Melbourne-ORD Chicago O'Hare Intl

28h 45m1 stop Hong Kong Intl

2:10 pm - 12:30 pmORD Chicago O'Hare Intl-MEL Melbourne

29h 20m1 stop Hong Kong Intl

$1,205Cathay Pacific

Sun, Nov 8 - Mon, Nov 23

10:20 am - 10:00 pmMEL Melbourne-ORD Chicago O'Hare Intl

28h 40m2 stops Auckland Intl Los Angeles

10:25 am - 10:55 amORD Chicago O'Hare Intl-MEL Melbourne

31h 30m2 stops Los Angeles Auckland Intl

$1,345Air New Zealand

Mon, Nov 9 - Mon, Nov 23

8:40 am - 4:55 pmPER Perth-ORD Chicago O'Hare Intl

22h 15m1 stop Manila Ninoy Aquino Intl

10:45 pm - 7:20 amORD Chicago O'Hare Intl-PER Perth

42h 35m1 stop Manila Ninoy Aquino Intl

$1,405Philippine Airlines

Mon, Nov 9 - Wed, Nov 25

11:35 am - 1:44 pmPER Perth-ORD Chicago O'Hare Intl

40h 09m2 stops Sydney Kingsford Smith San Francisco

6:45 pm - 8:30 pmORD Chicago O'Hare Intl-PER Perth

35h 45m2 stops Los Angeles Sydney Kingsford Smith

$1,982Qantas Airways

Wed, Nov 11 - Sun, Nov 15

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Philippine Airlines flights from Australia to Illinois

Our best Philippine Airlines deals on Australia to Illinois flight tickets

Philippine Airlines

Nov 27

MEL9:20 amMelbourne

24h 35m

1 stop

ORD4:55 pmChicago O'Hare Intl

Dec 2

ORD10:45 pmChicago O'Hare Intl

39h 45m

1 stop

MEL7:30 amMelbourne

$1,347

Philippine Airlines

Nov 27

MEL9:20 amMelbourne

24h 35m

1 stop

ORD4:55 pmChicago O'Hare Intl

Dec 2

ORD10:45 pmChicago O'Hare Intl

39h 45m

1 stop

MEL7:30 amMelbourne

$1,357

Philippine Airlines

Nov 22

SYD11:30 amSydney Kingsford Smith

46h 25m

1 stop

ORD4:55 pmChicago O'Hare Intl

Dec 11

ORD10:45 pmChicago O'Hare Intl

42h 05m

1 stop

SYD9:50 amSydney Kingsford Smith

$1,378

Qatar Airways flights from Australia to Illinois

Our best Qatar Airways deals on Australia to Illinois flight tickets

Qatar Airways

Feb 14

MEL4:10 pmMelbourne

39h 20m

1 stop

ORD2:30 pmChicago O'Hare Intl

Mar 14

ORD7:50 pmChicago O'Hare Intl

30h 00m

1 stop

MEL5:50 pmMelbourne

$1,350

Qatar Airways

Apr 2

MEL4:10 pmMelbourne

38h 55m

1 stop

ORD3:05 pmChicago O'Hare Intl

Apr 30

ORD7:20 pmChicago O'Hare Intl

30h 30m

1 stop

MEL4:50 pmMelbourne

$1,352

Qatar Airways

Feb 17

MEL6:50 pmMelbourne

36h 40m

2 stops

ORD2:30 pmChicago O'Hare Intl

Mar 11

ORD6:50 pmChicago O'Hare Intl

30h 00m

1 stop

MEL5:50 pmMelbourne

$1,367

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 2/18

11:20 am-10:55 pm

1 stop28h 35m

Chicago O'Hare Intl

Mon 2/22

6:46 pm-9:00 am

1 stop21h 14m

$735

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 11/16

10:40 am-11:55 pm

1 stop30h 15m

Chicago O'Hare Intl

Mon 11/30

7:45 am-8:30 am

1 stop31h 45m

$739

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 4/26

9:15 am-4:37 pm

2 stops46h 22m

Chicago O'Hare Intl

Sat 5/8

5:55 pm-6:50 am

2 stops45h 55m

$739

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 11/16

11:10 am-4:05 pm

1 stop21h 55m

Chicago O'Hare Intl

Mon 11/30

9:03 pm-9:00 am

1 stop42h 57m

$757

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 2/18

2:05 pm-2:18 pm

1 stop41h 13m

Chicago O'Hare Intl

Mon 2/22

4:59 pm-9:00 am

1 stop23h 01m

$767

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 4/27

10:20 am-4:55 pm

1 stop21h 35m

Chicago O'Hare Intl

Sat 5/8

8:50 pm-6:30 am

1 stop42h 40m

$769

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 4/26

12:00 pm-7:55 pm

1 stop22h 55m

Chicago O'Hare Intl

Sat 5/8

8:50 pm-6:30 am

1 stop42h 40m

$769

Quickest round-trip

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 11/26

11:15 am-4:42 pm

1 stop22h 27m

Chicago O'Hare Intl

Thu 12/3

5:15 pm-9:00 am

1 stop22h 45m

$782

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 11/21

11:10 am-5:11 pm

1 stop23h 01m

Chicago O'Hare Intl

Sun 12/6

1:30 pm-9:00 am

1 stop26h 30m

$784

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 2/1

11:10 am-4:54 pm

1 stop22h 44m

Chicago O'Hare Intl

Sat 2/20

4:59 pm-9:00 am

1 stop23h 01m

$784

Flights are sorted by cheapest round-trip 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?

The cheapest month to fly to Illinois from Australia is in March. Flight prices, which tend to average around $1,147, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,158.

How far in advance should I book a flight from Australia 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 $1,466 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Australia for as low as $875 on momondo.

Can stopping save me money on Australia to Illinois flights?

You could potentially save up to 26% 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	$431
Fastest flight time	20h 49m
Direct flights	None

The best one-way flight to Illinois from Australia in the past 72 hours is $431. The best round-trip flight deal from Australia to Illinois found on momondo in the last 72 hours is $735.

The fastest flight from Australia to Illinois takes 20h 49m

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 were last updated today.
How many operators does momondo search for flights from Australia to Illinois?
There is 1 operator available for flights from Australia to Illinois as of November 2026.
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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 license, 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
Qantas Airways	PriceFrom $970	Free Cancellation	Rating 7.5 1,123 reviews		Search Qantas Airways flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Australia to Illinois. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Australia to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Australia to Illinois?

Once all potential Australia to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Australia and alert you when they change.