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

Air Canada, Etihad Airways, and Turkish Airlines 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.

$847 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.

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

$1,730Air New Zealand

Mon, 1 Feb - Wed, 3 Mar

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

25h 45m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 06m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Wed, 21 Oct - Mon, 9 Nov

15:48 - 10:40ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 52m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 21:35SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 40m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Tue, 1 Sep - Tue, 8 Sep

14:00 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 35m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 06m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Mon, 2 Nov - Mon, 9 Nov

14:10 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 35m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 18:56SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 01m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Wed, 21 Oct - Mon, 9 Nov

14:00 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 35m2 stops Los Angeles Los Angeles Auckland Intl

11:50 - 18:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 04m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Wed, 25 Nov - Wed, 2 Dec

16:45 - 10:40ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 55m2 stops Los Angeles Los Angeles Auckland Intl

09:55 - 21:35SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 40m2 stops Auckland Intl Los Angeles Los Angeles

$1,730Air New Zealand

Tue, 1 Sep - Tue, 8 Sep

18:50 - 17:50ORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

23:40 - 14:30MEL Melbourne-ORD Chicago O'Hare Intl

31h 50m1 stop Doha Hamad Intl

$1,733Qatar Airways

Mon, 2 Nov - Wed, 11 Nov

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

21h 15m1 stop Los Angeles Los Angeles

11:15 - 15:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 44m1 stop Los Angeles Los Angeles

$2,209Qantas Airways

Tue, 1 Dec - Sun, 13 Dec

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

21h 15m1 stop Los Angeles Los Angeles

11:15 - 20:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 45m1 stop Los Angeles Los Angeles

$2,209Qantas Airways

Tue, 1 Dec - Sat, 26 Dec

Cheap last-minute flights

Enter your travel dates to find the best prices.

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,870Air Canada

Tue, 11 Aug - Tue, 25 Aug

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,870Air Canada

Mon, 10 Aug - Mon, 24 Aug

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 20:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 45m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,874Air Canada

Mon, 10 Aug - Mon, 24 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:36SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 16m1 stop Vancouver Intl

$1,874Air Canada

Tue, 11 Aug - Tue, 25 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 20:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 45m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,878Air Canada

Tue, 11 Aug - Tue, 25 Aug

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Vancouver Intl

09:20 - 20:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 45m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,890Air Canada

Tue, 11 Aug - Tue, 25 Aug

17:35 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

46h 45m2 stops Toronto Pearson Intl Vancouver Intl

09:20 - 10:16SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

39h 56m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,899Air Canada

Mon, 10 Aug - Mon, 24 Aug

21:13 - 07:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 17m1 stop Los Angeles Los Angeles

17:50 - 05:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 09m1 stop Los Angeles Los Angeles

$1,916Multiple Airlines

Tue, 11 Aug - Sun, 23 Aug

19:00 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 05m1 stop Los Angeles Los Angeles

12:00 - 19:42SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 42m1 stop Dallas/Fort Worth

$3,100Qantas Airways

Tue, 11 Aug - Thu, 13 Aug

19:00 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 05m1 stop Los Angeles Los Angeles

09:10 - 14:54SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 44m1 stop Los Angeles Los Angeles

$3,100Qantas Airways

Mon, 10 Aug - Wed, 12 Aug

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Air New Zealand flights from Chicago to Australia

Our best Air New Zealand deals on Chicago to Australia flight tickets

Air New Zealand

21 Oct

ORD14:10Chicago O'Hare Intl

26h 35m

2 stops

SYD08:45Sydney Kingsford Smith

9 Nov

SYD09:55Sydney Kingsford Smith

26h 01m

2 stops

ORD18:56Chicago O'Hare Intl

$1,730

Air New Zealand

1 Sept

ORD16:45Chicago O'Hare Intl

26h 55m

2 stops

SYD10:40Sydney Kingsford Smith

8 Sept

SYD09:55Sydney Kingsford Smith

26h 40m

2 stops

ORD21:35Chicago O'Hare Intl

$1,731

Air New Zealand

24 Oct

ORD21:38Chicago O'Hare Intl

42h 57m

2 stops

SYD08:35Sydney Kingsford Smith

9 Nov

SYD11:50Sydney Kingsford Smith

24h 06m

2 stops

ORD18:56Chicago O'Hare Intl

$1,742

ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

27 Sept

ORD19:45Chicago O'Hare Intl

32h 25m

2 stops

SYD19:10Sydney Kingsford Smith

12 Oct

SYD21:45Sydney Kingsford Smith

26h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,738

ANA

27 Sept

ORD17:45Chicago O'Hare Intl

34h 25m

1 stop

SYD19:10Sydney Kingsford Smith

12 Oct

SYD21:45Sydney Kingsford Smith

26h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,745

ANA

27 Sept

ORD11:00Chicago O'Hare Intl

41h 10m

2 stops

SYD19:10Sydney Kingsford Smith

12 Oct

SYD21:45Sydney Kingsford Smith

26h 55m

1 stop

ORD08:40Chicago O'Hare Intl

$1,754

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 21/10

15:00-08:45

2 stops25h 45m

Sydney Kingsford Smith

Mon 9/11

11:50-18:56

2 stops24h 06m

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/9

15:48-10:40

2 stops27h 52m

Sydney Kingsford Smith

Tue 8/9

09:55-21:35

2 stops26h 40m

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 2/11

14:00-08:35

2 stops25h 35m

Sydney Kingsford Smith

Mon 9/11

11:50-18:56

2 stops24h 06m

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 21/10

14:10-08:45

2 stops26h 35m

Sydney Kingsford Smith

Mon 9/11

09:55-18:56

2 stops26h 01m

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 25/11

14:00-08:35

2 stops25h 35m

Sydney Kingsford Smith

Wed 2/12

11:50-18:54

2 stops24h 04m

$1,730

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/9

16:45-10:40

2 stops26h 55m

Sydney Kingsford Smith

Tue 8/9

09:55-21:35

2 stops26h 40m

$1,730

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 2/11

18:50-17:50

1 stop30h 00m

Melbourne

Wed 11/11

23:40-14:30

1 stop31h 50m

$1,733

Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/12

18:45-09:00

1 stop21h 15m

Sydney Kingsford Smith

Sun 13/12

11:15-15:59

1 stop21h 44m

$2,209

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 1/12

18:45-09:00

1 stop21h 15m

Sydney Kingsford Smith

Sat 26/12

11:15-20:00

1 stop25h 45m

$2,209

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 $1,806. 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 $1,864.

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 $2,010 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 $1,643 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

Fastest flight time	22h 02m
Direct flights	None

The fastest flight from Chicago to Australia takes 22h 02m

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 $2,079	Free cancellation	Rating 7.5 1,081 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.