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

ANA, Turkish Airlines, and Delta are the most popular carriers operating from Chicago to Australia

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

Prices for flights from Chicago to Australia are updated daily.

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

As of August 2026, there is 1 operator available to choose from for flights from Chicago to Australia.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Australia.

What documentation or ID do you need to fly to Australia?

The required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$797 Cheap Flights from Chicago to Australia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:20 - 12:05ORD Chicago O'Hare Intl-MEL Melbourne

38h 45m3 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles Nadi

13:20 - 00:45MEL Melbourne-ORD Chicago O'Hare Intl

26h 25m3 stops Nadi Los Angeles Los Angeles Dallas/Fort Worth

$1,593Multiple Airlines

Sat, 19 Sep - Thu, 24 Sep

11:15 - 12:00ORD Chicago O'Hare Intl-MEL Melbourne

33h 45m3 stops Orlando Los Angeles Los Angeles Nadi

13:30 - 11:51MEL Melbourne-ORD Chicago O'Hare Intl

37h 21m3 stops Nadi Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,621Multiple Airlines

Fri, 18 Sep - Fri, 25 Sep

12:45 - 07:00ORD Chicago O'Hare Intl-BNE Brisbane

26h 15m2 stops Los Angeles Los Angeles Auckland Intl

08:20 - 20:22BNE Brisbane-ORD Chicago O'Hare Intl

28h 02m2 stops Auckland Intl Los Angeles Los Angeles

$1,717Air New Zealand

Mon, 1 Feb - Tue, 9 Feb

11:00 - 07:00ORD Chicago O'Hare Intl-BNE Brisbane

28h 00m2 stops Los Angeles Los Angeles Auckland Intl

08:20 - 18:54BNE Brisbane-ORD Chicago O'Hare Intl

26h 34m2 stops Auckland Intl Los Angeles Los Angeles

$1,717Air New Zealand

Wed, 17 Feb - Wed, 24 Feb

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

14:05 - 20:22SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 17m2 stops Auckland Intl Los Angeles Los Angeles

$1,720Air New Zealand

Wed, 10 Feb - Wed, 17 Feb

14:10 - 10:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 25m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 18:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 59m2 stops Auckland Intl Los Angeles Los Angeles

$1,720Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

14:10 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 25m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 19:14SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 24m2 stops Auckland Intl Houston George Bush Intcntl

$1,720Air New Zealand

Tue, 26 Jan - Tue, 9 Feb

06:30 - 13:00ORD Chicago O'Hare Intl-MEL Melbourne

38h 30m3 stops Denver Intl Los Angeles Los Angeles Nadi

13:55 - 05:16MEL Melbourne-ORD Chicago O'Hare Intl

31h 21m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

$1,721Multiple Airlines

Wed, 21 Oct - Sun, 25 Oct

15:52 - 06:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 03m1 stop Dallas/Fort Worth

11:15 - 16:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 36m1 stop Los Angeles Los Angeles

$2,190Qantas Airways

Sun, 8 Nov - Fri, 8 Jan

16:53 - 06:55ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 02m1 stop Dallas/Fort Worth

11:15 - 16:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 36m1 stop Los Angeles Los Angeles

$2,220Qantas Airways

Thu, 24 Dec - Thu, 7 Jan

Cheap last-minute flights

Enter your travel dates to find the best prices.

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 45m2 stops Los Angeles Los Angeles Auckland Intl

19:20 - 21:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 25m2 stops Auckland Intl San Francisco

$1,881Air New Zealand

Mon, 24 Aug - Mon, 7 Sep

07:05 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

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

27h 27m1 stop Los Angeles Los Angeles

$1,932Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

06:05 - 07:30MDW Chicago Midway-SYD Sydney Kingsford Smith

34h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

17:50 - 10:55SYD Sydney Kingsford Smith-MDW Chicago Midway

32h 05m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,933Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

06:05 - 19:10MDW Chicago Midway-SYD Sydney Kingsford Smith

46h 05m3 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles Tokyo Haneda

11:45 - 10:55SYD Sydney Kingsford Smith-MDW Chicago Midway

38h 10m3 stops Tokyo Haneda Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,936Multiple Airlines

Tue, 25 Aug - Tue, 1 Sep

19:20 - 22:05ORD Chicago O'Hare Intl-MEL Melbourne

35h 45m1 stop Doha Hamad Intl

16:10 - 15:05MEL Melbourne-ORD Chicago O'Hare Intl

37h 55m1 stop Doha Hamad Intl

$2,074Multiple Airlines

Wed, 26 Aug - Fri, 4 Sep

07:05 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 25m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

17:50 - 23:08SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

44h 18m2 stops Los Angeles Los Angeles Orlando

$2,083Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

19:20 - 17:10ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 50m1 stop Doha Hamad Intl

19:00 - 15:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

35h 05m2 stops Brisbane Doha Hamad Intl

$2,123Qatar Airways

Mon, 24 Aug - Mon, 7 Sep

21:20 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 10m1 stop Los Angeles Los Angeles

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

27h 27m1 stop Los Angeles Los Angeles

$2,138Multiple Airlines

Sun, 23 Aug - Mon, 31 Aug

15:22 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 08m1 stop Los Angeles Los Angeles

17:50 - 15:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

37h 04m1 stop Los Angeles Los Angeles

$2,675Qantas Airways

Tue, 25 Aug - Tue, 1 Sep

11:49 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 16m1 stop Los Angeles Los Angeles

12:00 - 20:30SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 30m1 stop Dallas/Fort Worth

$2,724Qantas Airways

Sat, 22 Aug - Mon, 31 Aug

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Air Canada flights from Chicago to Australia

Our best Air Canada deals on Chicago to Australia flight tickets

Air Canada

30 Aug

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

15 Sept

SYD09:20Sydney Kingsford Smith

20h 23m

1 stop

ORD14:43Chicago O'Hare Intl

$1,753

Air Canada

23 Sept

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

30 Sept

SYD09:20Sydney Kingsford Smith

20h 23m

1 stop

ORD14:43Chicago O'Hare Intl

$1,758

Air Canada

23 Sept

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

30 Sept

SYD09:20Sydney Kingsford Smith

24h 23m

2 stops

ORD18:43Chicago O'Hare Intl

$1,760

ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

9 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

16 Nov

SYD12:25Sydney Kingsford Smith

33h 55m

2 stops

ORD05:20Chicago O'Hare Intl

$1,788

ANA

15 Nov

ORD16:25Chicago O'Hare Intl

25h 05m

1 stop

SYD10:30Sydney Kingsford Smith

26 Nov

SYD21:45Sydney Kingsford Smith

26h 35m

1 stop

ORD07:20Chicago O'Hare Intl

$1,791

ANA

7 Nov

ORD07:00Chicago O'Hare Intl

44h 15m

2 stops

SYD20:15Sydney Kingsford Smith

13 Nov

SYD12:25Sydney Kingsford Smith

33h 55m

2 stops

ORD05:20Chicago O'Hare Intl

$1,794

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Sat 19/9

06:20-12:05

3 stops38h 45m

Melbourne

Thu 24/9

13:20-00:45

3 stops26h 25m

$1,593

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Fri 18/9

11:15-12:00

3 stops33h 45m

Melbourne

Fri 25/9

13:30-11:51

3 stops37h 21m

$1,621

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Mon 1/2

12:45-07:00

2 stops26h 15m

Brisbane

Tue 9/2

08:20-20:22

2 stops28h 02m

$1,717

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Wed 17/2

11:00-07:00

2 stops28h 00m

Brisbane

Wed 24/2

08:20-18:54

2 stops26h 34m

$1,717

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 10/2

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Wed 17/2

14:05-20:22

2 stops23h 17m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/2

14:10-10:35

2 stops27h 25m

Sydney Kingsford Smith

Wed 3/3

09:55-18:54

2 stops25h 59m

$1,720

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 26/1

14:10-08:35

2 stops25h 25m

Sydney Kingsford Smith

Tue 9/2

11:50-19:14

2 stops24h 24m

$1,720

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 21/10

06:30-13:00

3 stops38h 30m

Melbourne

Sun 25/10

13:55-05:16

3 stops31h 21m

$1,721

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sun 8/11

15:52-06:55

1 stop22h 03m

Sydney Kingsford Smith

Fri 8/1

11:15-16:51

1 stop22h 36m

$2,190

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Thu 24/12

16:53-06:55

1 stop21h 02m

Sydney Kingsford Smith

Thu 7/1

11:15-16:51

1 stop22h 36m

$2,220

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 Chicago to Australia

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

What is the cheapest month to fly to Australia?

In general, February is the cheapest month to fly from Chicago to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,817. If you don’t want to visit Australia in February, then you should wait until June to fly from Chicago, when ticket prices are also cheap, with an average price of $1,852.

How far in advance should I book a flight from Chicago to Australia?

You are more likely to see cheaper flights to Australia from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $2,011 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Chicago for as low as $1,544 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 8% on your flight if you consider stops on a Chicago to Australia flight.

Cheap Chicago to Australia flight deals and tips

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

Best price found	$797
Fastest flight time	20h 51m
Direct flights	None

The best one-way flight to Australia from Chicago in the past 72 hours is $797. The best return flight deal from Chicago to Australia found on momondo in the last 72 hours is $1,593.

The fastest flight from Chicago to Australia takes 20h 51m

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

Search flight deals

Frequently asked questions about flying from Chicago to Australia

When did momondo last update prices for flights from Chicago to Australia?
Prices for flights from Chicago to Australia are updated daily.
How many operators does momondo search for flights from Chicago to Australia?
As of August 2026, there is 1 operator available to choose from for flights from Chicago to Australia.
How old do you have to be to fly from Chicago to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Australia.
What documentation or ID do you need to fly to Australia?
The required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Chicago to Australia

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

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $2,065	Free cancellation	Rating 7.5 1,084 reviews		Search Qantas Airways flights

Why use momondo?

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

Finding the right flight to Australia from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Australia quick and easy, saving you time and money.

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

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

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

Once all potential Chicago to Australia 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 Chicago to Australia right now. Can momondo alert me if prices change?

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