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$465+ Cheap flights from Chicago (CHI) to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Chicago to Australia

Keep the following information in mind while searching for Chicago to Australia flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$981
(Trip.com)

One-way from

$527
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,149
From Chicago (CHI) to Australia
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One-way flight from Chicago (CHI) to Australia
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Highest demand for flights based on searches. 15% potential increase in price ($188 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Chicago to Australia

Cheapest flights from Chicago to Australia
Explore the most affordable flight options available from Chicago to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/218:05 amMDW - SYD
2 stops32h 00mMultiple Airlines
vie. 10/311:05 pmSYD - MDW
2 stops24h 40mMultiple Airlines
Deal found 9/9$981
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/209:44 amMDW - SYD
2 stops30h 21mMultiple Airlines
dom. 11/22:05 pmSYD - MDW
2 stops24h 58mMultiple Airlines
Deal found 9/10$1,030
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/2111:00 amORD - SYD
2 stops29h 05mMultiple Airlines
vie. 10/311:05 pmSYD - ORD
2 stops26h 34mMultiple Airlines
Deal found 9/9$1,064
This BYOjet deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/243:15 pmORD - SYD
2 stops36h 30mAlaska Airlines
vie. 10/319:40 pmSYD - ORD
2 stops24h 42mAlaska Airlines
Deal found 9/10$1,079
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/43:25 pmORD - SYD
2 stops35h 20mAlaska Airlines
mar. 11/189:40 pmSYD - ORD
1 stop35h 50mAlaska Airlines
Deal found 9/9$1,090
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/2012:28 pmORD - SYD
2 stops27h 37mMultiple Airlines
dom. 11/22:05 pmSYD - ORD
2 stops27h 06mMultiple Airlines
Deal found 9/10$1,103
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/106:30 amORD - SYD
2 stops37h 00mMultiple Airlines
jue. 11/132:00 pmSYD - ORD
2 stops26h 00mMultiple Airlines
Deal found 9/10$1,105
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/215:59 pmORD - SYD
2 stops33h 46mAlaska Airlines
mar. 10/289:40 pmSYD - ORD
2 stops34h 50mAlaska Airlines
Deal found 9/8$1,107
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/65:53 pmORD - SYD
2 stops32h 52mAlaska Airlines
sáb. 11/229:40 pmSYD - ORD
2 stops34h 13mAlaska Airlines
Deal found 9/10$1,120
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/135:53 pmORD - SYD
2 stops32h 52mAlaska Airlines
mar. 11/189:40 pmSYD - ORD
2 stops35h 50mAlaska Airlines
Deal found 9/9$1,121
This Jetabroad deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/243:15 pmORD - SYD
2 stops36h 30mHawaiian Airlines
vie. 10/319:40 pmSYD - ORD
2 stops24h 42mHawaiian Airlines
Deal found 9/9$1,130
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/216:00 amORD - SYD
2 stops32h 05mMultiple Airlines
sáb. 11/155:45 pmSYD - ORD
1 stop22h 15mMultiple Airlines
Deal found 9/11$1,136

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from Chicago to Australia that are best for you.

Fly from

Chicago

Fly to

Australia

Route

Depart

Return

Price

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

mar. 10/21

8:05 am-8:05 am

2 stops32h 00m

Sydney Kingsford Smith

vie. 10/31

1:05 pm-9:45 pm

2 stops24h 40m

$981

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 11/4

3:25 pm-7:45 pm

2 stops35h 20m

Sydney Kingsford Smith

mar. 11/18

9:40 pm-4:30 pm

2 stops35h 50m

$1,119

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

sáb. 10/25

7:25 am-12:35 pm

2 stops37h 40m

Adelaide

sáb. 11/1

1:15 pm-11:00 pm

2 stops25h 15m

$1,160

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/21

5:59 pm-7:45 pm

2 stops33h 46m

Sydney Kingsford Smith

mar. 10/28

9:40 pm-4:30 pm

2 stops34h 50m

$1,176

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

vie. 11/14

3:25 pm-7:45 pm

2 stops35h 20m

Sydney Kingsford Smith

sáb. 11/22

9:40 pm-2:53 pm

2 stops34h 13m

$1,177

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/21

5:59 pm-7:45 pm

2 stops33h 46m

Sydney Kingsford Smith

vie. 10/31

9:40 pm-4:57 pm

2 stops35h 17m

$1,250

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 9/23

6:30 pm-10:10 pm

2 stops36h 40m

Sydney Kingsford Smith

mar. 2/24

6:00 am-11:57 pm

2 stops34h 57m

$1,277

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

lun. 11/3

2:30 pm-10:55 am

2 stops27h 25m

Melbourne

dom. 11/16

12:10 pm-10:59 pm

2 stops27h 49m

$1,287

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

vie. 10/24

4:44 pm-10:35 am

3 stops26h 51m

Brisbane

vie. 10/31

11:35 am-12:17 am

3 stops27h 42m

$1,296

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

sáb. 9/27

6:15 am-7:30 am

2 stops34h 15m

Sydney Kingsford Smith

sáb. 10/11

10:10 am-11:39 am

2 stops41h 29m

$1,314

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 60 results
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Best time to book a flight from Chicago to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Australia

What is the cheapest month to book a flight from Chicago to Australia?

Currently, February is the cheapest month in which you can book a flight from Chicago to Australia (average of $1,035). Flying from Chicago to Australia in December is currently the most expensive (average of $1,626). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to AU?

Find hourly flight availability from Chicago to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

When flying from Chicago to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated septiembre 11, 2025.
See what other customers who have flown with Air New Zealand, Qantas Airways, and United Airlines from Chicago to Australia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.
Air New Zealand
8.0
Very good
505 reviews
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.
Qantas Airways
7.5
Good
905 reviews
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.
United Airlines
7.4
Good
8,937 reviews
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.
American Airlines
7.2
Good
10,000 reviews
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.
Air Canada
7.1
Good
10,000 reviews
Air New Zealand
8.0
Very good
505 reviews

Entertainment

7.4

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2025

AKL - SFO

Flight was delayed an hour. We had just flown Air NZ on a 12- hour flight from AKL so the extra delay on this connecting flight wasn’t welcomed.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to Australia?

    There are many flights that can get you from Chicago to Australia in 27h 25m. Fly via Alaska Airlines, Fiji Airways, or Air New Zealand to get the fastest option. The distance from Chicago to Australia is about 9660 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Chicago to Australia?

    While some choose either Chicago O'Hare Intl - Melbourne or Chicago Midway - Sydney Kingsford Smith, Chicago O'Hare Intl - Sydney Kingsford Smith is the most popular route from Chicago to Australia.

  • Can I find deals for flights from Chicago to Australia that include hotel bookings?

    Yes. In addition to deals on Chicago to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Australia.

  • Can I find deals for business class flights from Chicago to Australia?

    Yes. Cheapflights offers flight deals from Chicago to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Australia?

    Currently, February is the cheapest month in which you can book a flight from Chicago to Australia (average of $1,035). Flying from Chicago to Australia in December is currently the most expensive (average of $1,626). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Chicago to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Chicago to Australia

Discover the top 10 airlines that operate flights from Chicago to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$647Average$1,353FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,186FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$937FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$772Average$1,420FlexibilityNo cancel feeOn-time74%
DeltaCheapest$846Average$1,034FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$896Average$1,319FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,169Average$1,566FlexibilityNo cancel feeOn-time69%
Qatar AirwaysCheapest$1,229Average$1,331FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,264Average$1,443FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,468Average$1,956FlexibilityNo cancel feeOn-time72%

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