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

Philippine Airlines and Delta are the most popular carriers operating from Chicago to Australia

What airlines fly to Australia?

Qantas Airways, American Airlines and United Airlines are the top three most popular airlines that fly to Australia from Chicago according to our data. Qantas Airways is the first choice among our users, with 47% 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 February 2026.

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.

$435 Cheap Flights from Chicago to Australia in 2026

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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.

7:45 pm - 6:45 am

ORD

MEL

44h 00m

1 stop

1:25 pm - 5:50 am

MEL

ORD

31h 25m

2 stops

$912Multiple Airlines

Wed, Apr 8 - Wed, Apr 29

7:21 pm - 6:45 am

ORD

MEL

44h 24m

1 stop

1:30 pm - 5:50 am

MEL

ORD

31h 20m

2 stops

$921Multiple Airlines

Mon, Apr 20 - Mon, May 11

7:45 pm - 6:45 am

ORD

MEL

44h 00m

1 stop

1:30 pm - 5:50 am

MEL

ORD

31h 20m

2 stops

$928Multiple Airlines

Mon, Apr 6 - Sun, Apr 19

1:24 pm - 9:00 am

ORD

SYD

26h 36m

1 stop

7:05 am - 2:53 pm

SYD

ORD

24h 48m

2 stops

$944Qantas Airways

Thu, Feb 26 - Tue, Mar 3

4:45 pm - 7:25 am

ORD

SYD

21h 40m

1 stop

7:05 am - 2:53 pm

SYD

ORD

24h 48m

2 stops

$948Qantas Airways

Thu, Feb 26 - Tue, Mar 3

3:40 pm - 7:05 am

ORD

BNE

24h 25m

1 stop

10:00 am - 2:45 pm

BNE

ORD

19h 45m

1 stop

$963Air Canada

Wed, May 20 - Sun, May 31

3:40 pm - 7:05 am

ORD

BNE

24h 25m

1 stop

10:00 am - 2:43 pm

BNE

ORD

19h 43m

1 stop

$964Air Canada

Wed, Apr 15 - Sun, Apr 19

9:15 pm - 9:30 am

ORD

ADL

43h 45m

2 stops

2:15 pm - 9:37 pm

ADL

ORD

22h 52m

1 stop

$1,437United Airlines

Wed, Mar 4 - Wed, Mar 11

4:20 pm - 9:30 am

ORD

ADL

24h 40m

1 stop

7:00 pm - 2:54 pm

ADL

ORD

34h 24m

2 stops

$1,473United Airlines

Sat, Feb 21 - Sat, Apr 25

4:00 pm - 4:50 pm

ORD

PER

35h 50m

2 stops

6:50 pm - 11:00 pm

PER

ORD

41h 10m

2 stops

$1,477Air New Zealand

Tue, Mar 10 - Sun, Mar 22

Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

Feb 12

ORD4:45 pmChicago O'Hare Intl

23h 15m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 27

SYD7:05 amSydney Kingsford Smith

26h 32m

2 stops

ORD4:37 pmChicago O'Hare Intl

$941

Qantas Airways

Feb 16

ORD4:45 pmChicago O'Hare Intl

23h 15m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 24

SYD7:05 amSydney Kingsford Smith

24h 48m

2 stops

ORD2:53 pmChicago O'Hare Intl

$942

Qantas Airways

Feb 26

ORD1:24 pmChicago O'Hare Intl

26h 36m

1 stop

SYD9:00 amSydney Kingsford Smith

Mar 3

SYD7:05 amSydney Kingsford Smith

24h 48m

2 stops

ORD2:53 pmChicago O'Hare Intl

$944

Delta flights from Chicago to Australia

Our best Delta deals on Chicago to Australia flight tickets

Delta

Feb 17

MDW1:28 pmChicago Midway

24h 22m

2 stops

SYD6:50 amSydney Kingsford Smith

Mar 8

SYD10:40 amSydney Kingsford Smith

27h 51m

2 stops

MDW9:31 pmChicago Midway

$1,387

Delta

Feb 15

MDW11:01 amChicago Midway

26h 49m

2 stops

SYD6:50 amSydney Kingsford Smith

Mar 12

SYD9:40 amSydney Kingsford Smith

23h 42m

2 stops

MDW5:22 pmChicago Midway

$1,437

Delta

Feb 16

MDW1:26 pmChicago Midway

26h 04m

2 stops

SYD8:30 amSydney Kingsford Smith

Mar 11

SYD9:40 amSydney Kingsford Smith

25h 00m

2 stops

MDW6:40 pmChicago Midway

$1,474

Fly from

Fly to

Route

Depart

Return

Price

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 4/8

7:45 pm-6:45 am

1 stop44h 00m

Melbourne

Wed 4/29

1:25 pm-5:50 am

2 stops31h 25m

$912

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 4/20

7:21 pm-6:45 am

1 stop44h 24m

Melbourne

Mon 5/11

1:30 pm-5:50 am

2 stops31h 20m

$921

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 4/6

7:45 pm-6:45 am

1 stop44h 00m

Melbourne

Sun 4/19

1:30 pm-5:50 am

2 stops31h 20m

$928

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 2/26

1:24 pm-9:00 am

1 stop26h 36m

Sydney Kingsford Smith

Tue 3/3

7:05 am-2:53 pm

2 stops24h 48m

$944

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 2/26

4:45 pm-7:25 am

1 stop21h 40m

Sydney Kingsford Smith

Tue 3/3

7:05 am-2:53 pm

2 stops24h 48m

$948

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 5/20

3:40 pm-7:05 am

1 stop24h 25m

Brisbane

Sun 5/31

10:00 am-2:45 pm

1 stop19h 45m

$963

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 4/15

3:40 pm-7:05 am

1 stop24h 25m

Brisbane

Sun 4/19

10:00 am-2:43 pm

1 stop19h 43m

$964

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 3/4

9:15 pm-9:30 am

2 stops43h 45m

Adelaide

Wed 3/11

2:15 pm-9:37 pm

1 stop22h 52m

$1,437

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 2/21

4:20 pm-9:30 am

1 stop24h 40m

Adelaide

Sat 4/25

7:00 pm-2:54 pm

2 stops34h 24m

$1,473

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Tue 3/10

4:00 pm-4:50 pm

2 stops35h 50m

Perth

Sun 3/22

6:50 pm-11:00 pm

2 stops41h 10m

$1,477

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 October is, on average, the cheapest month to fly to Australia from Chicago, with most prices found around $966. If you aren’t able to travel during the month of October, then book flights to Australia from Chicago during February instead. Flights to Australia in February, while not as cheap as those in October, still average around $1,097.

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 $1,265 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 $1,052 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 23% 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

Fastest flight time	22h 20m
Direct flights	None

The fastest flight from Chicago to Australia takes 22h 20m

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 February 2026.
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 $675	Free Cancellation	Rating 7.5 988 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $698	Free Cancellation	Rating 7.2 11,266 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $795	Free Cancellation	Rating 8.0 225 reviews	Search Fiji Airways flights
United Airlines	PriceFrom $870	Free Cancellation	Rating 7.4 9,274 reviews	Search United Airlines flights
Air Canada	PriceFrom $872	Free Cancellation	Rating 7.1 10,708 reviews	Search Air Canada flights
Delta	PriceFrom $935	Free Cancellation	Rating 7.9 8,175 reviews	Search Delta flights
ANA	PriceFrom $1,177	Free Cancellation	Rating 8.4 1,090 reviews	Search ANA flights
Air New Zealand	PriceFrom $1,217	Free Cancellation	Rating 8.0 582 reviews	Search Air New Zealand flights
Qatar Airways	PriceFrom $1,229	Free Cancellation	Rating 7.4 3,731 reviews	Search Qatar Airways flights
Cathay Pacific	PriceFrom $1,470	Free Cancellation	Rating 7.6 1,161 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.