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.

$711 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.

18:23 - 09:00ORD-SYD

21h 37m1 stop

07:05 - 16:54SYD-ORD

26h 49m2 stops

$1,382Qantas Airways

Find Deal

Mon, 1 Dec - Sat, 6 Dec

18:40 - 09:00ORD-SYD

21h 20m1 stop

07:05 - 16:49SYD-ORD

26h 44m2 stops

$1,394Qantas Airways

Find Deal

Sun, 25 Jan - Tue, 3 Feb

19:39 - 17:15ORD-MEL

28h 36m2 stops

12:00 - 23:41MEL-ORD

28h 41m1 stop

$1,448Qantas Airways

Find Deal

Wed, 25 Feb - Fri, 6 Mar

05:15 - 09:35ORD-SYD

35h 20m3 stops

11:20 - 22:43SYD-ORD

28h 23m2 stops

$1,598Multiple Airlines

Find Deal

Wed, 11 Feb - Wed, 25 Feb

06:00 - 07:25MDW-SYD

32h 25m2 stops

11:20 - 23:21SYD-MDW

29h 01m2 stops

$1,713Multiple Airlines

Find Deal

Sat, 6 Dec - Sun, 21 Dec

15:40 - 16:20ORD-ADL

32h 10m2 stops

06:10 - 14:41ADL-ORD

25h 01m2 stops

$1,830Air Canada

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Fri, 23 Jan - Sat, 31 Jan

15:40 - 16:20ORD-ADL

32h 10m2 stops

06:00 - 19:30ADL-ORD

30h 00m3 stops

$1,847Air Canada

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Fri, 23 Jan - Sat, 31 Jan

21:05 - 09:30ORD-ADL

43h 55m2 stops

14:55 - 19:50ADL-ORD

21h 25m1 stop

$2,020United Airlines

Find Deal

Fri, 23 Jan - Sat, 31 Jan

14:00 - 07:40MDW-MEL

26h 40m2 stops

10:00 - 18:31MEL-MDW

23h 31m2 stops

$2,251Delta

Find Deal

Wed, 29 Apr - Sun, 31 May

13:26 - 08:30MDW-SYD

26h 04m2 stops

10:40 - 17:29SYD-MDW

23h 49m2 stops

$2,251Delta

Find Deal

Sun, 25 Jan - Sun, 1 Feb

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

1 Dec

ORD18:23Chicago O'Hare Intl

21h 37m

1 stop

SYD09:00Sydney Kingsford Smith

6 Dec

SYD07:05Sydney Kingsford Smith

26h 49m

2 stops

ORD16:54Chicago O'Hare Intl

$1,382

Find similar

Qantas Airways

25 Jan

ORD18:40Chicago O'Hare Intl

21h 20m

1 stop

SYD09:00Sydney Kingsford Smith

3 Feb

SYD07:05Sydney Kingsford Smith

26h 44m

2 stops

ORD16:49Chicago O'Hare Intl

$1,394

Find similar

Qantas Airways

25 Feb

ORD19:39Chicago O'Hare Intl

28h 36m

2 stops

MEL17:15Melbourne

6 Mar

MEL12:00Melbourne

28h 41m

1 stop

ORD23:41Chicago O'Hare Intl

$1,448

Find similar

Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

25 Jan

MDW13:26Chicago Midway

26h 04m

2 stops

SYD08:30Sydney Kingsford Smith

1 Feb

SYD10:40Sydney Kingsford Smith

23h 49m

2 stops

MDW17:29Chicago Midway

$2,251

Find similar

Delta

17 Jan

MDW17:31Chicago Midway

69h 29m

2 stops

MEL08:00Melbourne

18 Feb

MEL10:10Melbourne

25h 27m

2 stops

MDW18:37Chicago Midway

$2,281

Find similar

Delta

11 Feb

MDW13:49Chicago Midway

25h 41m

2 stops

SYD08:30Sydney Kingsford Smith

26 Feb

SYD10:40Sydney Kingsford Smith

24h 05m

2 stops

MDW17:45Chicago Midway

$2,327

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 1/12

18:23-09:00

1 stop21h 37m

Sydney Kingsford Smith

Sat 6/12

07:05-16:54

2 stops26h 49m

$1,382

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 25/1

18:40-09:00

1 stop21h 20m

Sydney Kingsford Smith

Tue 3/2

07:05-16:49

2 stops26h 44m

$1,394

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 25/2

19:39-17:15

2 stops28h 36m

Melbourne

Fri 6/3

12:00-23:41

1 stop28h 41m

$1,448

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 11/2

05:15-09:35

3 stops35h 20m

Sydney Kingsford Smith

Wed 25/2

11:20-22:43

2 stops28h 23m

$1,598

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sat 6/12

06:00-07:25

2 stops32h 25m

Sydney Kingsford Smith

Sun 21/12

11:20-23:21

2 stops29h 01m

$1,713

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 23/1

15:40-16:20

2 stops32h 10m

Adelaide

Sat 31/1

06:10-14:41

2 stops25h 01m

$1,830

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 23/1

15:40-16:20

2 stops32h 10m

Adelaide

Sat 31/1

06:00-19:30

3 stops30h 00m

$1,847

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 23/1

21:05-09:30

2 stops43h 55m

Adelaide

Sat 31/1

14:55-19:50

1 stop21h 25m

$2,020

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 29/4

14:00-07:40

2 stops26h 40m

Melbourne

Sun 31/5

10:00-18:31

2 stops23h 31m

$2,251

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 25/1

13:26-08:30

2 stops26h 04m

Sydney Kingsford Smith

Sun 1/2

10:40-17:29

2 stops23h 49m

$2,251

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

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 $1,306. 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 $1,326.

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 $1,413. 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 $3,775. 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 $1,811. 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 $2,489. 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 $1,609 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 $1,302 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 $1,315	Free cancellation	Rating 7.2 11,046 reviews		Search American Airlines flights
Qantas Airways	PriceFrom $1,332	Free cancellation	Rating 7.6 938 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.