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

Delta, United Airlines, and Cathay Pacific are the most popular carriers operating from Chicago to Australia

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 50% 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.

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 November 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.

$456 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.

6:23 pm - 9:00 amORD-SYD

21h 37m1 stop

7:05 am - 4:54 pmSYD-ORD

26h 49m2 stops

$900Qantas Airways

Find Deal

Mon, Dec 1 - Sat, Dec 6

6:40 pm - 9:00 amORD-SYD

21h 20m1 stop

7:05 am - 4:49 pmSYD-ORD

26h 44m2 stops

$908Qantas Airways

Find Deal

Sun, Jan 25 - Tue, Feb 3

7:39 pm - 5:15 pmORD-MEL

28h 36m2 stops

12:00 pm - 11:41 pmMEL-ORD

28h 41m1 stop

$943Qantas Airways

Find Deal

Wed, Feb 25 - Fri, Mar 6

3:40 pm - 4:20 pmORD-ADL

32h 10m2 stops

6:10 am - 2:41 pmADL-ORD

25h 01m2 stops

$1,192Air Canada

Find Deal

Fri, Jan 23 - Sat, Jan 31

3:40 pm - 4:20 pmORD-ADL

32h 10m2 stops

6:00 am - 7:30 pmADL-ORD

30h 00m3 stops

$1,203Air Canada

Find Deal

Fri, Jan 23 - Sat, Jan 31

9:05 pm - 9:30 amORD-ADL

43h 55m2 stops

2:55 pm - 7:50 pmADL-ORD

21h 25m1 stop

$1,316United Airlines

Find Deal

Fri, Jan 23 - Sat, Jan 31

12:48 pm - 8:00 amMDW-MEL

26h 12m2 stops

10:00 am - 9:46 pmMEL-MDW

26h 46m2 stops

$1,454Delta

Find Deal

Wed, Feb 11 - Wed, Sep 2

7:16 pm - 8:00 amMDW-MEL

43h 44m2 stops

10:00 am - 6:31 pmMEL-MDW

23h 31m2 stops

$1,466Delta

Find Deal

Tue, Feb 10 - Sun, Jun 7

5:09 pm - 10:55 amORD-ADL

27h 16m2 stops

10:10 am - 8:22 pmADL-ORD

48h 42m2 stops

$1,591Air New Zealand

Find Deal

Wed, May 6 - Tue, Jun 30

9:35 pm - 10:55 amORD-ADL

46h 50m2 stops

8:55 pm - 11:50 pmADL-ORD

41h 25m2 stops

$1,600Air New Zealand

Find Deal

Sun, May 3 - Tue, Jun 30

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

Dec 1

ORD6:23 pmChicago O'Hare Intl

21h 37m

1 stop

SYD9:00 amSydney Kingsford Smith

Dec 6

SYD7:05 amSydney Kingsford Smith

26h 49m

2 stops

ORD4:54 pmChicago O'Hare Intl

$900

Find similar

Qantas Airways

Jan 25

ORD6:40 pmChicago O'Hare Intl

21h 20m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 3

SYD7:05 amSydney Kingsford Smith

26h 44m

2 stops

ORD4:49 pmChicago O'Hare Intl

$908

Find similar

Qantas Airways

Feb 25

ORD7:39 pmChicago O'Hare Intl

28h 36m

2 stops

MEL5:15 pmMelbourne

Mar 6

MEL12:00 pmMelbourne

22h 41m

1 stop

ORD5:41 pmChicago O'Hare Intl

$943

Find similar

Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

Feb 11

MDW12:48 pmChicago Midway

26h 12m

2 stops

MEL8:00 amMelbourne

Sep 2

MEL10:00 amMelbourne

26h 46m

2 stops

MDW9:46 pmChicago Midway

$1,454

Find similar

Delta

Feb 8

MDW10:48 amChicago Midway

27h 02m

2 stops

SYD6:50 amSydney Kingsford Smith

Mar 10

SYD1:15 pmSydney Kingsford Smith

24h 31m

2 stops

MDW9:46 pmChicago Midway

$1,466

Find similar

Delta

Feb 6

MDW12:48 pmChicago Midway

26h 12m

2 stops

MEL8:00 amMelbourne

Sep 2

MEL10:00 amMelbourne

26h 46m

2 stops

MDW9:46 pmChicago Midway

$1,504

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 12/1

6:23 pm-9:00 am

1 stop21h 37m

Sydney Kingsford Smith

Sat 12/6

7:05 am-4:54 pm

2 stops26h 49m

$900

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/25

6:40 pm-9:00 am

1 stop21h 20m

Sydney Kingsford Smith

Tue 2/3

7:05 am-4:49 pm

2 stops26h 44m

$908

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 2/25

7:39 pm-5:15 pm

2 stops28h 36m

Melbourne

Fri 3/6

12:00 pm-11:41 pm

1 stop28h 41m

$943

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 1/23

3:40 pm-4:20 pm

2 stops32h 10m

Adelaide

Sat 1/31

6:10 am-2:41 pm

2 stops25h 01m

$1,192

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 1/23

3:40 pm-4:20 pm

2 stops32h 10m

Adelaide

Sat 1/31

6:00 am-7:30 pm

3 stops30h 00m

$1,203

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 1/23

9:05 pm-9:30 am

2 stops43h 55m

Adelaide

Sat 1/31

2:55 pm-7:50 pm

1 stop21h 25m

$1,316

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 2/11

12:48 pm-8:00 am

2 stops26h 12m

Melbourne

Wed 9/2

10:00 am-9:46 pm

2 stops26h 46m

$1,454

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Tue 2/10

7:16 pm-8:00 am

2 stops43h 44m

Melbourne

Sun 6/7

10:00 am-6:31 pm

2 stops23h 31m

$1,466

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 5/6

5:09 pm-10:55 am

2 stops27h 16m

Adelaide

Tue 6/30

10:10 am-8:22 pm

2 stops48h 42m

$1,591

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sun 5/3

9:35 pm-10:55 am

2 stops46h 50m

Adelaide

Tue 6/30

8:55 pm-11:50 pm

2 stops41h 25m

$1,600

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 May instead. Flights to Australia in May, while not as cheap as those in August, still average around $864.

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 $1,048 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 $848 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 20% 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 November 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 $673	Free Cancellation	Rating 7.5 941 reviews	Search Qantas Airways flights
ANA	PriceFrom $679	Free Cancellation	Rating 8.4 1,007 reviews	Search ANA flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 11,044 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $772	Free Cancellation	Rating 8.1 209 reviews	Search Fiji Airways flights
Delta	PriceFrom $846	Free Cancellation	Rating 7.9 8,003 reviews	Search Delta flights
United Airlines	PriceFrom $870	Free Cancellation	Rating 7.4 9,019 reviews	Search United Airlines flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,462 reviews	Search Air Canada flights
Qatar Airways	PriceFrom $1,229	Free Cancellation	Rating 7.4 3,664 reviews	Search Qatar Airways flights
Air New Zealand	PriceFrom $1,264	Free Cancellation	Rating 8.0 529 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,061 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.