What airlines fly to Australia?

American Airlines, Qantas Airways and United Airlines are the top three most popular airlines that fly to Australia from Chicago according to our data. American Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 10 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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

Qantas Airways, American Airlines, and United 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 were last updated today.

How many operators does momondo search for flights from Chicago to Australia?

The number of operators available for flights from Chicago to Australia is 10 as of October 2025.

How old do you have to be to fly from Chicago to Australia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$412 Cheap Flights from Chicago to Australia in 2025/26

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Find the cheapest flights from Chicago to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:00 pm - 9:00 amORD-SYD

25h 00m1 stop

5:45 pm - 11:54 pmSYD-ORD

23h 09m2 stops

$845American Airlines

Find Deal

Thu, Nov 6 - Sat, Nov 22

11:40 am - 9:00 amORD-SYD

28h 20m1 stop

11:20 am - 4:51 pmSYD-ORD

22h 31m1 stop

$846Qantas Airways

Find Deal

Sat, Nov 22 - Tue, Dec 30

9:35 am - 9:00 amORD-SYD

30h 25m1 stop

11:20 am - 3:55 pmSYD-ORD

21h 35m1 stop

$847American Airlines

Find Deal

Sat, Nov 8 - Tue, Nov 18

8:50 am - 9:00 amORD-SYD

31h 10m1 stop

11:20 am - 4:48 pmSYD-ORD

22h 28m1 stop

$848Qantas Airways

Find Deal

Thu, Nov 6 - Sat, Nov 22

3:40 pm - 8:40 amORD-SYD

48h 00m2 stops

11:20 am - 2:41 pmSYD-ORD

20h 21m1 stop

$850Air Canada

Find Deal

Tue, Jan 27 - Mon, Feb 2

3:55 pm - 7:00 amORD-SYD

22h 05m1 stop

12:10 pm - 2:45 pmSYD-ORD

19h 35m1 stop

$851United Airlines

Find Deal

Sun, Feb 15 - Sun, Mar 1

3:40 pm - 6:55 amORD-SYD

22h 15m1 stop

11:20 am - 8:00 pmSYD-ORD

25h 40m2 stops

$853Air Canada

Find Deal

Thu, Dec 25 - Thu, Jan 15

6:31 pm - 9:05 amORD-SYD

21h 34m1 stop

12:10 pm - 2:45 pmSYD-ORD

19h 35m1 stop

$854United Airlines

Find Deal

Sat, Feb 14 - Wed, Mar 4

2:40 pm - 9:25 amORD-MEL

25h 45m2 stops

12:10 pm - 9:32 pmMEL-ORD

26h 22m2 stops

$1,312Air New Zealand

Find Deal

Tue, Jan 20 - Fri, Jan 30

8:10 pm - 4:50 pmORD-PER

54h 40m2 stops

5:20 pm - 5:02 pmPER-ORD

37h 42m2 stops

$2,130Air New Zealand

Find Deal

Sat, Jan 10 - Sat, Jan 31

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

Nov 22

ORD11:40 amChicago O'Hare Intl

28h 20m

1 stop

SYD9:00 amSydney Kingsford Smith

Dec 30

SYD11:20 amSydney Kingsford Smith

22h 31m

1 stop

ORD4:51 pmChicago O'Hare Intl

$846

Find similar

Qantas Airways

Nov 6

ORD8:50 amChicago O'Hare Intl

31h 10m

1 stop

SYD9:00 amSydney Kingsford Smith

Nov 22

SYD11:20 amSydney Kingsford Smith

22h 28m

1 stop

ORD4:48 pmChicago O'Hare Intl

$848

Find similar

Qantas Airways

Dec 6

ORD6:17 pmChicago O'Hare Intl

28h 58m

2 stops

ADL3:45 pmAdelaide

Dec 13

ADL7:50 amAdelaide

25h 34m

2 stops

ORD4:54 pmChicago O'Hare Intl

$849

Find similar

Air Canada flights from Chicago to Australia

Our best Air Canada deals on Chicago to Australia flight tickets

Air Canada

Jan 27

ORD3:40 pmChicago O'Hare Intl

48h 00m

2 stops

SYD8:40 amSydney Kingsford Smith

Feb 2

SYD11:20 amSydney Kingsford Smith

20h 21m

1 stop

ORD2:41 pmChicago O'Hare Intl

$850

Find similar

Air Canada

Dec 25

ORD3:40 pmChicago O'Hare Intl

22h 15m

1 stop

SYD6:55 amSydney Kingsford Smith

Jan 15

SYD11:20 amSydney Kingsford Smith

25h 40m

2 stops

ORD8:00 pmChicago O'Hare Intl

$853

Find similar

Air Canada

Feb 16

ORD9:05 pmChicago O'Hare Intl

43h 30m

2 stops

SYD9:35 amSydney Kingsford Smith

Mar 1

SYD11:20 amSydney Kingsford Smith

51h 44m

2 stops

ORD10:04 pmChicago O'Hare Intl

$855

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 11/6

3:00 pm-9:00 am

1 stop25h 00m

Sydney Kingsford Smith

Sat 11/22

5:45 pm-11:54 pm

2 stops23h 09m

$845

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 11/22

11:40 am-9:00 am

1 stop28h 20m

Sydney Kingsford Smith

Tue 12/30

11:20 am-4:51 pm

1 stop22h 31m

$846

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 11/8

9:35 am-9:00 am

1 stop30h 25m

Sydney Kingsford Smith

Tue 11/18

11:20 am-3:55 pm

1 stop21h 35m

$847

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 11/6

8:50 am-9:00 am

1 stop31h 10m

Sydney Kingsford Smith

Sat 11/22

11:20 am-4:48 pm

1 stop22h 28m

$848

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 1/27

3:40 pm-8:40 am

2 stops48h 00m

Sydney Kingsford Smith

Mon 2/2

11:20 am-2:41 pm

1 stop20h 21m

$850

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 2/15

3:55 pm-7:00 am

1 stop22h 05m

Sydney Kingsford Smith

Sun 3/1

12:10 pm-2:45 pm

1 stop19h 35m

$851

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 12/25

3:40 pm-6:55 am

1 stop22h 15m

Sydney Kingsford Smith

Thu 1/15

11:20 am-8:00 pm

2 stops25h 40m

$853

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/14

6:31 pm-9:05 am

1 stop21h 34m

Sydney Kingsford Smith

Wed 3/4

12:10 pm-2:45 pm

1 stop19h 35m

$854

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Tue 1/20

2:40 pm-9:25 am

2 stops25h 45m

Melbourne

Fri 1/30

12:10 pm-9:32 pm

2 stops26h 22m

$1,312

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 1/10

8:10 pm-4:50 pm

2 stops54h 40m

Perth

Sat 1/31

5:20 pm-5:02 pm

2 stops37h 42m

$2,130

Flights are sorted by cheapest round-trip 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?

The month of August is, on average, the cheapest month to fly to Australia from Chicago, with most prices found around $851. If you aren’t able to travel during the month of August, then book flights to Australia from Chicago during September instead. Flights to Australia in September, while not as cheap as those in August, still average around $856.

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

The cheapest day to depart from Chicago to Australia is on a Saturday. Travelers who choose to depart for Australia on a Saturday will often find tickets for as low as $935. On the other hand, Thursday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,415.

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

Flying to Australia from Chicago in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,185 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,417 on average. Flights to Australia from Chicago in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,086 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Chicago for as low as $859 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 24% 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 were last updated today.
How many operators does momondo search for flights from Chicago to Australia?
The number of operators available for flights from Chicago to Australia is 10 as of October 2025.
How old do you have to be to fly from Chicago to Australia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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 $630	Free Cancellation	Rating 7.5 922 reviews	Search Qantas Airways flights
ANA	PriceFrom $679	Free Cancellation	Rating 8.4 991 reviews	Search ANA flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 11,033 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $772	Free Cancellation	Rating 8.0 207 reviews	Search Fiji Airways flights
Delta	PriceFrom $846	Free Cancellation	Rating 7.9 7,982 reviews	Search Delta flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,351 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,169	Free Cancellation	Rating 7.4 8,995 reviews	Search United Airlines flights
Qatar Airways	PriceFrom $1,229	Free Cancellation	Rating 7.4 3,657 reviews	Search Qatar Airways flights
Air New Zealand	PriceFrom $1,264	Free Cancellation	Rating 8.0 517 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,038 reviews	Search Cathay Pacific flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Australia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Australia from Chicago.

Can I find flights from Chicago to Australia with flexible booking policies on momondo?

Flights from Chicago to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Australia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to Australia.

I’m not ready to book a flight from Chicago to Australia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Australia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.