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

Qantas Airways, ANA, and Philippine Airlines 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.

$488 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.

6:40 pm - 9:00 amORD-SYD

21h 20m1 stop

7:05 am - 4:39 pmSYD-ORD

26h 34m2 stops

$899Qantas Airways

Find Deal

Tue, Feb 10 - Tue, Feb 24

11:45 am - 5:15 pmORD-MEL

36h 30m2 stops

12:00 pm - 7:43 pmMEL-ORD

23h 43m1 stop

$942Qantas Airways

Find Deal

Wed, Feb 25 - Wed, Mar 11

2:00 pm - 9:30 amORD-MEL

26h 30m1 stop

6:45 am - 4:39 pmMEL-ORD

26h 54m2 stops

$950Qantas Airways

Find Deal

Tue, Feb 17 - Tue, Mar 3

1:12 pm - 6:10 pmORD-ADL

36h 28m3 stops

6:55 pm - 2:43 pmADL-ORD

35h 18m2 stops

$1,133Air Canada

Find Deal

Wed, Feb 25 - Tue, Mar 31

10:47 am - 7:30 amORD-MEL

29h 43m1 stop

10:55 am - 11:29 pmMEL-ORD

27h 34m1 stop

$1,154United Airlines

Find Deal

Wed, Apr 8 - Tue, Apr 21

6:20 pm - 8:15 amORD-MEL

22h 55m1 stop

10:55 am - 9:13 pmMEL-ORD

25h 18m2 stops

$1,158United Airlines

Find Deal

Wed, Apr 8 - Tue, Apr 21

10:35 am - 7:40 amMDW-MEL

30h 05m2 stops

10:00 am - 6:31 pmMEL-MDW

23h 31m2 stops

$1,165Delta

Find Deal

Wed, Apr 29 - Sun, May 31

1:35 pm - 7:40 amORD-MEL

27h 05m2 stops

10:00 am - 9:52 pmMEL-ORD

26h 52m2 stops

$1,165Delta

Find Deal

Wed, Apr 29 - Sun, May 31

3:35 pm - 4:20 pmORD-ADL

32h 15m2 stops

6:10 am - 4:38 pmADL-ORD

26h 58m2 stops

$1,281Air Canada

Find Deal

Fri, Feb 27 - Tue, Mar 3

8:10 pm - 11:00 amORD-HBA

45h 50m2 stops

12:20 pm - 6:14 amHBA-ORD

34h 54m2 stops

$1,564Air New Zealand

Find Deal

Thu, Feb 19 - Tue, Feb 24

United Airlines flights from Chicago to Australia

Our best United Airlines deals on Chicago to Australia flight tickets

United Airlines

Jan 14

ORD6:47 amChicago O'Hare Intl

33h 28m

1 stop

SYD9:15 amSydney Kingsford Smith

Jan 27

SYD2:00 pmSydney Kingsford Smith

23h 05m

1 stop

ORD8:05 pmChicago O'Hare Intl

$1,149

Find similar

United Airlines

Apr 8

ORD10:47 amChicago O'Hare Intl

29h 43m

1 stop

MEL7:30 amMelbourne

Apr 21

MEL10:55 amMelbourne

27h 34m

1 stop

ORD11:29 pmChicago O'Hare Intl

$1,154

Find similar

United Airlines

Apr 8

ORD6:20 pmChicago O'Hare Intl

22h 55m

1 stop

MEL8:15 amMelbourne

Apr 21

MEL10:55 amMelbourne

25h 18m

2 stops

ORD9:13 pmChicago O'Hare Intl

$1,158

Find similar

Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

Feb 10

MDW1:26 pmChicago Midway

24h 24m

2 stops

SYD6:50 amSydney Kingsford Smith

Feb 17

SYD10:40 amSydney Kingsford Smith

24h 05m

2 stops

MDW5:45 pmChicago Midway

$1,165

Find similar

Delta

Jan 16

ORD5:59 pmChicago O'Hare Intl

43h 51m

2 stops

SYD6:50 amSydney Kingsford Smith

Jan 25

SYD10:40 amSydney Kingsford Smith

24h 15m

2 stops

ORD5:55 pmChicago O'Hare Intl

$1,290

Find similar

Delta

Feb 10

MDW1:26 pmChicago Midway

24h 24m

2 stops

SYD6:50 amSydney Kingsford Smith

Mar 3

SYD10:40 amSydney Kingsford Smith

24h 05m

2 stops

MDW5:45 pmChicago Midway

$1,465

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 2/10

6:40 pm-9:00 am

1 stop21h 20m

Sydney Kingsford Smith

Tue 2/24

7:05 am-4:39 pm

2 stops26h 34m

$899

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 2/25

11:45 am-5:15 pm

2 stops36h 30m

Melbourne

Wed 3/11

12:00 pm-7:43 pm

1 stop23h 43m

$942

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Tue 2/17

2:00 pm-9:30 am

1 stop26h 30m

Melbourne

Tue 3/3

6:45 am-4:39 pm

2 stops26h 54m

$950

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 2/25

1:12 pm-6:10 pm

3 stops36h 28m

Adelaide

Tue 3/31

6:55 pm-2:43 pm

2 stops35h 18m

$1,133

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 4/8

10:47 am-7:30 am

1 stop29h 43m

Melbourne

Tue 4/21

10:55 am-11:29 pm

1 stop27h 34m

$1,154

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 4/8

6:20 pm-8:15 am

1 stop22h 55m

Melbourne

Tue 4/21

10:55 am-9:13 pm

2 stops25h 18m

$1,158

ChicagoMelbourne

MDW - MEL

MDWMEL

Chicago Midway

Wed 4/29

10:35 am-7:40 am

2 stops30h 05m

Melbourne

Sun 5/31

10:00 am-6:31 pm

2 stops23h 31m

$1,165

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 4/29

1:35 pm-7:40 am

2 stops27h 05m

Melbourne

Sun 5/31

10:00 am-9:52 pm

2 stops26h 52m

$1,165

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 2/27

3:35 pm-4:20 pm

2 stops32h 15m

Adelaide

Tue 3/3

6:10 am-4:38 pm

2 stops26h 58m

$1,281

ChicagoHobart

ORD - HBA

ORDHBA

Chicago O'Hare Intl

Thu 2/19

8:10 pm-11:00 am

2 stops45h 50m

Hobart

Tue 2/24

12:20 pm-6:14 am

2 stops34h 54m

$1,564

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 7.5 942 reviews	Search Qantas Airways flights
ANA	PriceFrom $679	Free Cancellation	Rating 8.4 1,009 reviews	Search ANA flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 11,048 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 9,031 reviews	Search United Airlines flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,464 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 8.0 533 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,064 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.