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

Philippine Airlines, Cathay Pacific, and Air New Zealand are the most popular carriers operating from Chicago to Australia

What airlines fly to Australia?

Qantas Airways, Air Canada 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 November 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.

$571 Cheap Flights from Chicago to Australia in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

8:59 am - 12:25 pmORD Chicago O'Hare Intl-MEL Melbourne

34h 26m3 stops Dallas/Fort Worth Los Angeles Nadi

1:35 pm - 5:01 amMEL Melbourne-ORD Chicago O'Hare Intl

32h 26m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

$1,161Multiple Airlines

Fri, Dec 4 - Mon, Dec 7

5:40 am - 9:30 amORD Chicago O'Hare Intl-MEL Melbourne

34h 50m1 stop Los Angeles

1:35 pm - 7:05 amMEL Melbourne-ORD Chicago O'Hare Intl

34h 30m2 stops Nadi Los Angeles

$1,170Multiple Airlines

Wed, Feb 24 - Sat, Feb 27

6:50 pm - 5:50 pmORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

4:10 pm - 3:30 pmMEL Melbourne-ORD Chicago O'Hare Intl

39h 20m1 stop Doha Hamad Intl

$1,262Qatar Airways

Mon, Mar 1 - Thu, Mar 18

6:50 pm - 5:50 pmORD Chicago O'Hare Intl-MEL Melbourne

30h 00m1 stop Doha Hamad Intl

5:10 pm - 2:30 pmMEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,263Qatar Airways

Tue, Feb 9 - Tue, Feb 16

8:21 pm - 8:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 14m2 stops Houston George Bush Intcntl Auckland Intl

2:05 pm - 8:22 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 17m2 stops Auckland Intl Los Angeles

$1,308Air New Zealand

Sat, Feb 27 - Mon, Mar 8

8:21 pm - 8:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

43h 14m2 stops Houston George Bush Intcntl Auckland Intl

11:50 am - 7:56 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 06m2 stops Auckland Intl Houston George Bush Intcntl

$1,308Air New Zealand

Sat, Feb 20 - Tue, Mar 2

3:25 pm - 6:25 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 00m1 stop Los Angeles

11:20 am - 7:45 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 25m1 stop Los Angeles

$1,314American Airlines

Fri, Mar 5 - Mon, Mar 15

1:38 pm - 6:25 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 47m1 stop San Francisco

9:10 am - 2:16 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 06m1 stop Los Angeles

$1,314American Airlines

Fri, Mar 26 - Tue, Apr 6

9:05 pm - 6:25 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

40h 20m1 stop Los Angeles

7:15 pm - 4:15 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

38h 00m2 stops Auckland Intl Los Angeles

$1,339Qantas Airways

Fri, Dec 4 - Fri, Dec 11

4:54 pm - 6:55 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 01m1 stop Dallas/Fort Worth

2:05 pm - 6:29 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 24m1 stop Dallas/Fort Worth

$1,448Qantas Airways

Sun, Feb 14 - Sun, Feb 21

Cheap last minute flights

Enter your travel dates to find the best prices.

6:29 am - 9:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 21m2 stops Los Angeles Manila Ninoy Aquino Intl

11:30 am - 5:02 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

34h 32m2 stops Manila Ninoy Aquino Intl Los Angeles

$1,308Multiple Airlines

Mon, Nov 9 - Mon, Nov 16

7:55 pm - 9:50 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

56h 55m2 stops Houston George Bush Intcntl Auckland Intl

11:50 am - 6:56 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

24h 06m2 stops Auckland Intl Los Angeles

$1,369Air New Zealand

Sat, Nov 14 - Fri, Nov 20

9:57 pm - 8:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

41h 38m2 stops San Francisco Auckland Intl

7:25 pm - 10:00 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

43h 35m2 stops Auckland Intl Los Angeles

$1,394Air New Zealand

Tue, Nov 10 - Tue, Nov 17

5:30 am - 9:50 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

35h 20m2 stops Los Angeles Manila Ninoy Aquino Intl

11:30 am - 4:55 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 25m1 stop Manila Ninoy Aquino Intl

$1,477Multiple Airlines

Mon, Nov 9 - Sun, Nov 22

3:30 pm - 9:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 05m1 stop Vancouver Intl

11:20 am - 2:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

44h 17m1 stop Vancouver Intl

$1,501Air Canada

Sat, Nov 14 - Fri, Nov 27

3:30 pm - 9:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 05m1 stop Vancouver Intl

11:20 am - 2:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

44h 17m1 stop Vancouver Intl

$1,506Air Canada

Sat, Nov 14 - Fri, Nov 27

6:50 pm - 5:30 pmORD Chicago O'Hare Intl-BNE Brisbane

30h 40m1 stop Doha Hamad Intl

9:55 pm - 2:30 pmBNE Brisbane-ORD Chicago O'Hare Intl

32h 35m1 stop Doha Hamad Intl

$1,519Qatar Airways

Thu, Nov 12 - Wed, Nov 25

6:50 pm - 11:20 pmORD Chicago O'Hare Intl-MEL Melbourne

35h 30m1 stop Doha Hamad Intl

5:10 pm - 2:30 pmMEL Melbourne-ORD Chicago O'Hare Intl

38h 20m1 stop Doha Hamad Intl

$1,534Qatar Airways

Tue, Nov 10 - Fri, Nov 20

1:44 pm - 5:00 amORD Chicago O'Hare Intl-MEL Melbourne

22h 16m1 stop Dallas/Fort Worth

12:00 pm - 7:59 pmMEL Melbourne-ORD Chicago O'Hare Intl

24h 59m1 stop Dallas/Fort Worth

$1,662Qantas Airways

Sat, Nov 14 - Sun, Dec 6

1:44 pm - 5:00 amORD Chicago O'Hare Intl-MEL Melbourne

22h 16m1 stop Dallas/Fort Worth

12:00 pm - 7:59 pmMEL Melbourne-ORD Chicago O'Hare Intl

24h 59m1 stop Dallas/Fort Worth

$1,707Qantas Airways

Sat, Nov 14 - Sun, Dec 6

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Qantas Airways flights from Chicago to Australia

Our best Qantas Airways deals on Chicago to Australia flight tickets

Qantas Airways

Dec 4

ORD9:05 pmChicago O'Hare Intl

40h 20m

1 stop

SYD6:25 amSydney Kingsford Smith

Dec 11

SYD7:15 pmSydney Kingsford Smith

38h 00m

2 stops

ORD4:15 pmChicago O'Hare Intl

$1,339

Qantas Airways

Nov 17

ORD3:25 pmChicago O'Hare Intl

24h 35m

1 stop

SYD9:00 amSydney Kingsford Smith

Nov 30

SYD11:10 amSydney Kingsford Smith

23h 01m

1 stop

ORD5:11 pmChicago O'Hare Intl

$1,636

Qantas Airways

Nov 14

ORD1:44 pmChicago O'Hare Intl

22h 16m

1 stop

MEL5:00 amMelbourne

Dec 6

MEL12:00 pmMelbourne

24h 59m

1 stop

ORD7:59 pmChicago O'Hare Intl

$1,662

American Airlines flights from Chicago to Australia

Our best American Airlines deals on Chicago to Australia flight tickets

American Airlines

Feb 1

ORD3:29 pmChicago O'Hare Intl

22h 21m

1 stop

BNE5:50 amBrisbane

Feb 14

BNE1:10 pmBrisbane

19h 48m

1 stop

ORD4:58 pmChicago O'Hare Intl

$1,274

American Airlines

Feb 1

ORD3:06 pmChicago O'Hare Intl

22h 44m

2 stops

BNE5:50 amBrisbane

Feb 14

BNE1:10 pmBrisbane

22h 44m

2 stops

ORD7:54 pmChicago O'Hare Intl

$1,278

American Airlines

Apr 8

ORD5:25 pmChicago O'Hare Intl

22h 40m

2 stops

SYD7:05 amSydney Kingsford Smith

Apr 27

SYD12:00 pmSydney Kingsford Smith

22h 55m

1 stop

ORD7:55 pmChicago O'Hare Intl

$1,368

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Fri 12/4

8:59 am-12:25 pm

3 stops34h 26m

Melbourne

Mon 12/7

1:35 pm-5:01 am

3 stops32h 26m

$1,161

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 2/24

5:40 am-9:30 am

1 stop34h 50m

Melbourne

Sat 2/27

1:35 pm-7:05 am

2 stops34h 30m

$1,170

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 3/1

6:50 pm-5:50 pm

1 stop30h 00m

Melbourne

Thu 3/18

4:10 pm-3:30 pm

1 stop39h 20m

$1,262

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Tue 2/9

6:50 pm-5:50 pm

1 stop30h 00m

Melbourne

Tue 2/16

5:10 pm-2:30 pm

1 stop38h 20m

$1,263

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sat 2/27

8:21 pm-8:35 am

2 stops43h 14m

Sydney Kingsford Smith

Mon 3/8

2:05 pm-8:22 pm

2 stops23h 17m

$1,308

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sat 2/20

8:21 pm-8:35 am

2 stops43h 14m

Sydney Kingsford Smith

Tue 3/2

11:50 am-7:56 pm

2 stops25h 06m

$1,308

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 3/5

3:25 pm-6:25 am

1 stop22h 00m

Sydney Kingsford Smith

Mon 3/15

11:20 am-7:45 pm

1 stop24h 25m

$1,314

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 3/26

1:38 pm-6:25 am

1 stop24h 47m

Sydney Kingsford Smith

Tue 4/6

9:10 am-2:16 pm

1 stop20h 06m

$1,314

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 12/4

9:05 pm-6:25 am

1 stop40h 20m

Sydney Kingsford Smith

Fri 12/11

7:15 pm-4:15 pm

2 stops38h 00m

$1,339

Quickest round-trip

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sun 2/14

4:54 pm-6:55 am

1 stop21h 01m

Sydney Kingsford Smith

Sun 2/21

2:05 pm-6:29 pm

1 stop21h 24m

$1,448

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 January is, on average, the cheapest month to fly to Australia from Chicago, with most prices found around $1,183. If you aren’t able to travel during the month of January, then book flights to Australia from Chicago during February instead. Flights to Australia in February, while not as cheap as those in January, still average around $1,271.

How far in advance should I book a flight from Chicago 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 $1,500 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 $1,081 on momondo.

Can stopping save me money on Chicago to Australia flights?

You could potentially save up to 17% 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

Best Price Found	$571
Fastest flight time	23h 29m
Direct flights	None

The best one-way flight to Australia from Chicago in the past 72 hours is $571. The best round-trip flight deal from Chicago to Australia found on momondo in the last 72 hours is $1,161.

The fastest flight from Chicago to Australia takes 23h 29m

There are no direct flights from Chicago to Australia. There are no popular flight routes from Chicago to Australia.

Search flight deals

Frequently asked questions about flying 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 November 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
Delta	PriceFrom $237	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
Air Canada	PriceFrom $712	Free Cancellation	Rating 7.1 11,875 reviews	Search Air Canada flights
Fiji Airways	PriceFrom $716	Free Cancellation	Rating 8.0 262 reviews	Search Fiji Airways flights
Qantas Airways	PriceFrom $911	Free Cancellation	Rating 7.5 1,123 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $1,144	Free Cancellation	Rating 7.3 10,470 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,166	Free Cancellation	Rating 7.0 12,228 reviews	Search American Airlines flights
ANA	PriceFrom $1,209	Free Cancellation	Rating 8.3 1,339 reviews	Search ANA flights
Qatar Airways	PriceFrom $1,218	Free Cancellation	Rating 7.4 3,707 reviews	Search Qatar Airways flights
Air New Zealand	PriceFrom $1,279	Free Cancellation	Rating 8.0 683 reviews	Search Air New Zealand flights
Cathay Pacific	PriceFrom $1,560	Free Cancellation	Rating 7.6 1,541 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.