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

Philippine Airlines, Delta, and Cathay Pacific 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 November 2025, there are 2 operators 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.

$743 Cheap Flights from Chicago to Australia in 2025/26

1 adult

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Find the cheapest flights from Chicago to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:00 - 20:50ORD-SYD

37h 50m2 stops

11:20 - 14:50SYD-ORD

19h 30m1 stop

$1,442Qantas Airways

Find Deal

Thu, 26 Feb - Thu, 12 Mar

09:02 - 09:00ORD-SYD

30h 58m1 stop

07:05 - 16:49SYD-ORD

26h 44m2 stops

$1,451Qantas Airways

Find Deal

Wed, 21 Jan - Wed, 28 Jan

15:35 - 09:35ORD-SYD

25h 00m1 stop

11:20 - 14:41SYD-ORD

20h 21m1 stop

$1,455Air Canada

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Tue, 10 Feb - Tue, 3 Mar

12:50 - 08:45ORD-BNE

27h 55m2 stops

10:45 - 08:00BNE-ORD

37h 15m2 stops

$1,455Air Canada

Find Deal

Tue, 10 Feb - Sun, 22 Feb

15:35 - 08:45ORD-BNE

25h 10m1 stop

10:45 - 14:41BNE-ORD

19h 56m1 stop

$1,456Air Canada

Find Deal

Tue, 10 Feb - Sun, 22 Feb

08:45 - 09:35ORD-SYD

31h 50m2 stops

11:20 - 08:00SYD-ORD

37h 40m3 stops

$1,464Air Canada

Find Deal

Tue, 10 Feb - Tue, 17 Feb

15:35 - 14:15ORD-MEL

29h 40m2 stops

19:50 - 14:41MEL-ORD

35h 51m2 stops

$1,611Multiple Airlines

Find Deal

Sun, 25 Jan - Sat, 7 Feb

15:00 - 07:25MDW-SYD

47h 25m2 stops

11:20 - 22:19SYD-MDW

27h 59m2 stops

$1,759Multiple Airlines

Find Deal

Mon, 12 Jan - Sun, 25 Jan

13:05 - 07:40MDW-MEL

27h 35m2 stops

10:00 - 18:31MEL-MDW

23h 31m2 stops

$1,782Delta

Find Deal

Wed, 29 Apr - Sun, 31 May

13:05 - 06:35MDW-SYD

26h 30m2 stops

09:25 - 18:05SYD-MDW

23h 40m2 stops

$1,782Delta

Find Deal

Mon, 4 May - Wed, 9 Sep

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

26 Feb

ORD14:00Chicago O'Hare Intl

37h 50m

2 stops

SYD20:50Sydney Kingsford Smith

12 Mar

SYD11:20Sydney Kingsford Smith

19h 30m

1 stop

ORD14:50Chicago O'Hare Intl

$1,442

Find similar

Qantas Airways

23 Jan

ORD14:15Chicago O'Hare Intl

25h 45m

1 stop

SYD09:00Sydney Kingsford Smith

30 Jan

SYD07:05Sydney Kingsford Smith

24h 52m

2 stops

ORD14:57Chicago O'Hare Intl

$1,451

Find similar

Qantas Airways

21 Jan

ORD14:15Chicago O'Hare Intl

25h 45m

1 stop

SYD09:00Sydney Kingsford Smith

28 Jan

SYD07:05Sydney Kingsford Smith

24h 52m

2 stops

ORD14:57Chicago O'Hare Intl

$1,453

Find similar

Air Canada flights from Chicago to Australia

Our best Air Canada deals on Chicago to Australia flight tickets

Air Canada

10 Feb

ORD15:35Chicago O'Hare Intl

25h 00m

1 stop

SYD09:35Sydney Kingsford Smith

3 Mar

SYD11:20Sydney Kingsford Smith

20h 21m

1 stop

ORD14:41Chicago O'Hare Intl

$1,455

Find similar

Air Canada

10 Feb

ORD08:45Chicago O'Hare Intl

32h 00m

2 stops

BNE08:45Brisbane

22 Feb

BNE10:45Brisbane

25h 25m

2 stops

ORD20:10Chicago O'Hare Intl

$1,456

Find similar

Air Canada

10 Feb

ORD08:45Chicago O'Hare Intl

31h 50m

2 stops

SYD09:35Sydney Kingsford Smith

17 Feb

SYD11:20Sydney Kingsford Smith

37h 40m

3 stops

ORD08:00Chicago O'Hare Intl

$1,464

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 26/2

14:00-20:50

2 stops37h 50m

Sydney Kingsford Smith

Thu 12/3

11:20-14:50

1 stop19h 30m

$1,442

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 21/1

09:02-09:00

1 stop30h 58m

Sydney Kingsford Smith

Wed 28/1

07:05-16:49

2 stops26h 44m

$1,451

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/2

15:35-09:35

1 stop25h 00m

Sydney Kingsford Smith

Tue 3/3

11:20-14:41

1 stop20h 21m

$1,455

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 10/2

12:50-08:45

2 stops27h 55m

Brisbane

Sun 22/2

10:45-08:00

2 stops37h 15m

$1,455

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 10/2

15:35-08:45

1 stop25h 10m

Brisbane

Sun 22/2

10:45-14:41

1 stop19h 56m

$1,456

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/2

08:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 17/2

11:20-08:00

3 stops37h 40m

$1,464

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Sun 25/1

15:35-14:15

2 stops29h 40m

Melbourne

Sat 7/2

19:50-14:41

2 stops35h 51m

$1,611

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 12/1

15:00-07:25

2 stops47h 25m

Sydney Kingsford Smith

Sun 25/1

11:20-22:19

2 stops27h 59m

$1,759

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 29/4

13:05-07:40

2 stops27h 35m

Melbourne

Sun 31/5

10:00-18:31

2 stops23h 31m

$1,782

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 4/5

13:05-06:35

2 stops26h 30m

Sydney Kingsford Smith

Wed 9/9

09:25-18:05

2 stops23h 40m

$1,782

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, August 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 $1,305. If you don’t want to visit Australia in August, then you should wait until May to fly from Chicago, when ticket prices are also cheap, with an average price of $1,321.

What is the cheapest day to depart on your flight to Australia?

On average, the least expensive day to fly to Australia from Chicago is on a Friday. momondo users have found tickets for Friday departures for as low as $1,408. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Chicago to Australia on a Thursday will generally be more expensive and average around $3,761. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Australia?

According to our data, the cheapest time of day to fly to Australia is in the afternoon. momondo users have found flights departing from Chicago to Australia in the afternoon for as low as $1,804. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the evening, with an average ticket price of $2,479. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $1,605 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 $1,299 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 37% 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	21h 44m
Direct flights	None

The fastest flight from Chicago to Australia takes 21h 44m

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

Search flight deals

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 November 2025, there are 2 operators 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
American Airlines	PriceFrom $1,310	Free cancellation	Rating 7.2 11,044 reviews		Search American Airlines flights
Qantas Airways	PriceFrom $1,327	Free cancellation	Rating 7.5 946 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.