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

Air Canada, Delta, and Qantas Airways 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 September 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.

$749 Cheap Flights from Chicago to Australia in 2026/27

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.

22:45 - 07:30ORD Chicago O'Hare Intl-MEL Melbourne

39h 45m1 stop Manila Ninoy Aquino Intl

09:20 - 16:55MEL Melbourne-ORD Chicago O'Hare Intl

24h 35m1 stop Manila Ninoy Aquino Intl

$1,643Philippine Airlines

Mon, 22 Feb - Mon, 8 Mar

08:40 - 08:45ORD Chicago O'Hare Intl-BNE Brisbane

32h 05m2 stops Calgary Vancouver Intl

10:45 - 16:50BNE Brisbane-ORD Chicago O'Hare Intl

22h 05m2 stops Vancouver Intl Calgary

$1,670Air Canada

Tue, 9 Feb - Wed, 3 Mar

08:40 - 08:45ORD Chicago O'Hare Intl-BNE Brisbane

32h 05m2 stops Calgary Vancouver Intl

10:45 - 14:35BNE Brisbane-ORD Chicago O'Hare Intl

19h 50m1 stop Vancouver Intl

$1,673Air Canada

Tue, 9 Feb - Wed, 3 Mar

15:35 - 08:45ORD Chicago O'Hare Intl-BNE Brisbane

25h 10m1 stop Vancouver Intl

10:45 - 14:35BNE Brisbane-ORD Chicago O'Hare Intl

19h 50m1 stop Vancouver Intl

$1,674Air Canada

Tue, 9 Feb - Wed, 3 Mar

11:05 - 08:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

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

10:20 - 14:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 17m1 stop Vancouver Intl

$1,682Air Canada

Tue, 20 Oct - Tue, 27 Oct

13:55 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 19:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 39m1 stop Vancouver Intl

$1,682Air Canada

Wed, 28 Oct - Wed, 4 Nov

13:55 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,685Air Canada

Wed, 28 Oct - Wed, 4 Nov

11:05 - 08:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

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

10:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,685Air Canada

Tue, 20 Oct - Tue, 27 Oct

13:21 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 39m1 stop Los Angeles Los Angeles

14:05 - 19:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 54m1 stop Dallas/Fort Worth

$1,924Qantas Airways

Mon, 4 Jan - Thu, 4 Feb

18:55 - 08:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 10m1 stop Los Angeles Los Angeles

10:10 - 20:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 50m1 stop Los Angeles Los Angeles

$1,970Qantas Airways

Tue, 13 Oct - Tue, 20 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

08:23 - 08:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

32h 37m2 stops Los Angeles Los Angeles Manila Ninoy Aquino Intl

10:15 - 05:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

34h 44m2 stops Manila Ninoy Aquino Intl Los Angeles Los Angeles

$1,854Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

18:59 - 08:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

46h 01m2 stops San Francisco Manila Ninoy Aquino Intl

10:15 - 12:34SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 19m2 stops Manila Ninoy Aquino Intl San Francisco

$1,855Multiple Airlines

Mon, 21 Sep - Mon, 28 Sep

21:10 - 05:00ORD Chicago O'Hare Intl-MEL Melbourne

40h 50m2 stops Los Angeles Los Angeles Manila Ninoy Aquino Intl

08:00 - 23:30MEL Melbourne-ORD Chicago O'Hare Intl

30h 30m2 stops Manila Ninoy Aquino Intl Los Angeles Los Angeles

$1,865Multiple Airlines

Sat, 19 Sep - Wed, 23 Sep

19:48 - 10:40ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 52m2 stops Vancouver Intl Brisbane

09:20 - 14:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 23m1 stop Vancouver Intl

$1,885Air Canada

Tue, 22 Sep - Tue, 29 Sep

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

24h 40m1 stop Vancouver Intl

09:20 - 20:06SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 46m1 stop Vancouver Intl

$2,119Air Canada

Wed, 23 Sep - Tue, 29 Sep

08:43 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 37m2 stops Calgary Vancouver Intl

09:20 - 20:06SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 46m1 stop Vancouver Intl

$2,119Air Canada

Wed, 23 Sep - Tue, 29 Sep

08:45 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 35m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 17:10SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 50m2 stops Vancouver Intl Calgary

$2,123Air Canada

Sun, 20 Sep - Wed, 25 Nov

08:45 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 35m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

09:20 - 14:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 23m1 stop Vancouver Intl

$2,123Air Canada

Mon, 21 Sep - Wed, 30 Sep

15:20 - 09:30ORD Chicago O'Hare Intl-MEL Melbourne

27h 10m2 stops Los Angeles Los Angeles Brisbane

14:05 - 14:20MEL Melbourne-ORD Chicago O'Hare Intl

39h 15m2 stops Sydney Kingsford Smith Los Angeles Los Angeles

$2,824Qantas Airways

Sat, 19 Sep - Mon, 21 Sep

11:37 - 08:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 43m2 stops New York John F Kennedy Intl Auckland Intl

22:00 - 15:53SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 53m2 stops Melbourne Los Angeles Los Angeles

$7,352Qantas Airways

Fri, 18 Sep - Sun, 20 Sep

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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

1 Feb

ORD12:45Chicago O'Hare Intl

26h 50m

2 stops

SYD08:35Sydney Kingsford Smith

3 Mar

SYD11:50Sydney Kingsford Smith

28h 37m

2 stops

ORD23:27Chicago O'Hare Intl

$1,737

Air New Zealand

8 Nov

ORD13:00Chicago O'Hare Intl

26h 35m

2 stops

SYD08:35Sydney Kingsford Smith

18 Nov

SYD11:50Sydney Kingsford Smith

24h 06m

2 stops

ORD18:56Chicago O'Hare Intl

$1,741

Air New Zealand

24 Jan

ORD14:40Chicago O'Hare Intl

24h 55m

2 stops

SYD08:35Sydney Kingsford Smith

2 Feb

SYD11:50Sydney Kingsford Smith

25h 45m

2 stops

ORD20:35Chicago O'Hare Intl

$1,744

ANA flights from Chicago to Australia

Our best ANA deals on Chicago to Australia flight tickets

ANA

4 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

17 Nov

SYD21:45Sydney Kingsford Smith

33h 53m

2 stops

ORD14:38Chicago O'Hare Intl

$1,789

ANA

1 Mar

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

22 Mar

SYD12:25Sydney Kingsford Smith

35h 55m

1 stop

ORD08:20Chicago O'Hare Intl

$1,793

ANA

24 Feb

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

12 Mar

SYD12:25Sydney Kingsford Smith

35h 55m

1 stop

ORD07:20Chicago O'Hare Intl

$1,795

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 22/2

22:45-07:30

1 stop39h 45m

Melbourne

Mon 8/3

09:20-16:55

1 stop24h 35m

$1,643

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Tue 9/2

08:40-08:45

2 stops32h 05m

Brisbane

Wed 3/3

10:45-16:50

2 stops22h 05m

$1,670

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Tue 9/2

08:40-08:45

2 stops32h 05m

Brisbane

Wed 3/3

10:45-14:35

1 stop19h 50m

$1,673

Fastest return journey

ChicagoBrisbane

ORD Chicago O'Hare Intl - BNE Brisbane

ORDBNE

Chicago O'Hare Intl

Tue 9/2

15:35-08:45

1 stop25h 10m

Brisbane

Wed 3/3

10:45-14:35

1 stop19h 50m

$1,674

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 20/10

11:05-08:20

2 stops29h 15m

Sydney Kingsford Smith

Tue 27/10

10:20-14:37

1 stop20h 17m

$1,682

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 28/10

13:55-08:35

2 stops26h 40m

Sydney Kingsford Smith

Wed 4/11

11:20-19:59

1 stop25h 39m

$1,682

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 28/10

13:55-08:35

2 stops26h 40m

Sydney Kingsford Smith

Wed 4/11

11:20-19:52

2 stops25h 32m

$1,685

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 20/10

11:05-08:20

2 stops29h 15m

Sydney Kingsford Smith

Tue 27/10

10:20-19:52

2 stops25h 32m

$1,685

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 4/1

13:21-09:00

1 stop26h 39m

Sydney Kingsford Smith

Thu 4/2

14:05-19:59

1 stop22h 54m

$1,924

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 13/10

18:55-08:05

1 stop21h 10m

Sydney Kingsford Smith

Tue 20/10

10:10-20:00

1 stop25h 50m

$1,970

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 $1,805. 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 $1,862.

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 $2,014 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 $1,543 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 11% 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	$749
Fastest flight time	23h 48m
Direct flights	None

The best one-way flight to Australia from Chicago in the past 72 hours is $749. The best return flight deal from Chicago to Australia found on momondo in the last 72 hours is $1,643.

The fastest flight from Chicago to Australia takes 23h 48m

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 September 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 $2,222	Free cancellation	Rating 7.5 1,100 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.