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

ANA, Philippine 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 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.

$703 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.

09:02 - 09:00ORD-SYD

30h 58m1 stop

07:05 - 14:57SYD-ORD

24h 52m2 stops

$1,390Qantas Airways

Find Deal

Fri, 23 Jan - Fri, 30 Jan

16:30 - 09:00ORD-SYD

23h 30m1 stop

07:05 - 21:33SYD-ORD

31h 28m2 stops

$1,392Qantas Airways

Find Deal

Thu, 12 Feb - Thu, 26 Feb

15:40 - 07:20ORD-SYD

24h 40m1 stop

09:20 - 05:38SYD-ORD

35h 18m1 stop

$1,472Air Canada

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Tue, 5 May - Tue, 26 May

10:35 - 09:35ORD-SYD

30h 00m3 stops

10:20 - 14:41SYD-ORD

20h 21m1 stop

$1,482Air Canada

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Sun, 8 Feb - Tue, 10 Mar

15:35 - 13:55ORD-ADL

29h 50m2 stops

19:40 - 19:30ADL-ORD

40h 20m3 stops

$1,607Multiple Airlines

Find Deal

Fri, 6 Feb - Sat, 21 Feb

14:00 - 10:35ORD-MEL

29h 35m3 stops

06:00 - 19:58MEL-ORD

28h 58m2 stops

$1,616Multiple Airlines

Find Deal

Sat, 4 Apr - Tue, 14 Apr

14:00 - 07:40MDW-MEL

26h 40m2 stops

10:00 - 21:45MEL-MDW

26h 45m2 stops

$1,804Delta

Find Deal

Wed, 29 Apr - Sun, 31 May

13:26 - 08:30MDW-SYD

26h 04m2 stops

13:15 - 21:46SYD-MDW

24h 31m2 stops

$1,804Delta

Find Deal

Sun, 8 Feb - Tue, 10 Mar

21:05 - 06:30ORD-BNE

41h 25m1 stop

10:40 - 21:36BNE-ORD

25h 56m1 stop

$1,807United Airlines

Find Deal

Sat, 7 Mar - Mon, 16 Mar

21:05 - 06:30ORD-BNE

41h 25m1 stop

10:40 - 21:29BNE-ORD

25h 49m2 stops

$1,813United Airlines

Find Deal

Sat, 7 Mar - Mon, 16 Mar

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

23 Jan

ORD09:02Chicago O'Hare Intl

30h 58m

1 stop

SYD09:00Sydney Kingsford Smith

30 Jan

SYD07:05Sydney Kingsford Smith

24h 52m

2 stops

ORD14:57Chicago O'Hare Intl

$1,390

Find similar

Qantas Airways

12 Feb

ORD16:30Chicago O'Hare Intl

23h 30m

1 stop

SYD09:00Sydney Kingsford Smith

26 Feb

SYD07:05Sydney Kingsford Smith

31h 28m

2 stops

ORD21:33Chicago O'Hare Intl

$1,392

Find similar

Qantas Airways

19 Jan

ORD18:40Chicago O'Hare Intl

21h 20m

1 stop

SYD09:00Sydney Kingsford Smith

29 Jan

SYD07:05Sydney Kingsford Smith

24h 52m

2 stops

ORD14:57Chicago O'Hare Intl

$1,406

Find similar

Air Canada flights from Chicago to Australia

Our best Air Canada deals on Chicago to Australia flight tickets

Air Canada

5 May

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD07:20Sydney Kingsford Smith

26 May

SYD09:20Sydney Kingsford Smith

35h 18m

1 stop

ORD05:38Chicago O'Hare Intl

$1,472

Find similar

Air Canada

8 Feb

ORD10:35Chicago O'Hare Intl

30h 00m

3 stops

SYD09:35Sydney Kingsford Smith

10 Mar

SYD10:20Sydney Kingsford Smith

20h 21m

1 stop

ORD14:41Chicago O'Hare Intl

$1,482

Find similar

Air Canada

20 May

ORD08:40Chicago O'Hare Intl

31h 40m

3 stops

SYD07:20Sydney Kingsford Smith

25 May

SYD09:20Sydney Kingsford Smith

20h 29m

1 stop

ORD14:49Chicago O'Hare Intl

$1,483

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 23/1

09:02-09:00

1 stop30h 58m

Sydney Kingsford Smith

Fri 30/1

07:05-14:57

2 stops24h 52m

$1,390

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 12/2

16:30-09:00

1 stop23h 30m

Sydney Kingsford Smith

Thu 26/2

07:05-21:33

2 stops31h 28m

$1,392

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 5/5

15:40-07:20

1 stop24h 40m

Sydney Kingsford Smith

Tue 26/5

09:20-05:38

1 stop35h 18m

$1,472

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/2

10:35-09:35

3 stops30h 00m

Sydney Kingsford Smith

Tue 10/3

10:20-14:41

1 stop20h 21m

$1,482

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 6/2

15:35-13:55

2 stops29h 50m

Adelaide

Sat 21/2

19:40-19:30

3 stops40h 20m

$1,607

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Sat 4/4

14:00-10:35

3 stops29h 35m

Melbourne

Tue 14/4

06:00-19:58

2 stops28h 58m

$1,616

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 29/4

14:00-07:40

2 stops26h 40m

Melbourne

Sun 31/5

10:00-21:45

2 stops26h 45m

$1,804

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 8/2

13:26-08:30

2 stops26h 04m

Sydney Kingsford Smith

Tue 10/3

13:15-21:46

2 stops24h 31m

$1,804

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 7/3

21:05-06:30

1 stop41h 25m

Brisbane

Mon 16/3

10:40-21:36

1 stop25h 56m

$1,807

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 7/3

21:05-06:30

1 stop41h 25m

Brisbane

Mon 16/3

10:40-21:29

2 stops25h 49m

$1,813

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 $1,321. 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 $1,338.

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 $1,425. 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 $3,807. 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 $1,826. 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 $2,510. 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 $1,625 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 $1,315 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 22% 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

Direct flights	None

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 $1,327	Free cancellation	Rating 7.2 11,047 reviews		Search American Airlines flights
Qantas Airways	PriceFrom $1,344	Free cancellation	Rating 7.5 943 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.