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$511+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$802
(Expedia)

One-way from

$511
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,071
From Chicago (CHI) to Australia
Search Deals
One-way flight from Chicago (CHI) to Australia
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($181 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Expedia deal was found by Cheapflights users on 7/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:40 pmORD - SYD
1 stop24h 40mAir Canada
Tue 8/199:20 amSYD - ORD
1 stop25h 44mAir Canada
Deal found 7/29$802
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/33:40 pmORD - MEL
2 stops30h 05mAir Canada
Sun 11/167:10 amMEL - ORD
2 stops26h 34mAir Canada
Deal found 7/29$871
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:41 pmORD - BNE
1 stop20h 24mAir Canada
Tue 9/2310:20 amBNE - ORD
1 stop19h 40mAir Canada
Deal found 7/29$982
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Sun 11/22:40 pmORD - PER
2 stops47h 40mMultiple Airlines
Tue 11/115:35 amPER - ORD
2 stops45h 25mMultiple Airlines
Deal found 7/28$1,048
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Tue 8/263:20 pmORD - SYD
2 stops32h 20mMultiple Airlines
Tue 9/25:45 pmSYD - ORD
1 stop26h 55mMultiple Airlines
Deal found 7/29$1,059
This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/213:40 pmORD - ADL
2 stops35h 00mAir Canada
Thu 11/136:10 amADL - ORD
2 stops27h 04mAir Canada
Deal found 7/28$1,135
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Mon 9/226:20 amMDW - SYD
2 stops33h 45mMultiple Airlines
Wed 10/81:10 pmSYD - MDW
2 stops25h 48mMultiple Airlines
Deal found 7/28$1,136
This Trip.com deal was found by Cheapflights users on 7/27. 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.
Thu 8/286:20 amORD - MEL
2 stops38h 40mMultiple Airlines
Sat 9/131:30 pmMEL - ORD
2 stops24h 43mMultiple Airlines
Deal found 7/27$1,150
This CrystalTravel deal was found by Cheapflights users on 7/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:25 pmORD - SYD
1 stop25h 05mANA
Sun 12/79:45 pmSYD - ORD
1 stop26h 35mANA
Deal found 7/29$1,152
This Trip.com deal was found by Cheapflights users on 7/28. 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.
Thu 9/1112:54 pmORD - ADL
2 stops32h 11mMultiple Airlines
Thu 9/1812:35 pmADL - ORD
2 stops37h 54mMultiple Airlines
Deal found 7/28$1,231
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/206:30 pmORD - BNE
2 stops25h 05mFiji Airways
Sat 10/411:40 amBNE - ORD
2 stops25h 05mFiji Airways
Deal found 7/28$1,236
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2911:55 pmORD - BNE
2 stops42h 00mAir New Zealand
Sun 12/76:05 pmBNE - ORD
2 stops42h 20mAir New Zealand
Deal found 7/29$1,245

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 July 29, 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

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 8/4

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

Tue 8/19

9:20 am-8:04 pm

1 stop25h 44m

$802

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 8/18

7:35 pm-12:20 pm

2 stops25h 45m

Melbourne

Sat 8/23

6:40 pm-2:54 pm

2 stops35h 14m

$876

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 9/9

7:41 pm-7:05 am

1 stop20h 24m

Brisbane

Tue 9/23

10:20 am-3:00 pm

1 stop19h 40m

$982

ChicagoCairns

ORD - CNS

ORDCNS

Chicago O'Hare Intl

Mon 10/20

7:41 pm-11:05 am

2 stops24h 24m

Cairns

Wed 11/5

6:00 am-2:41 pm

2 stops24h 41m

$991

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 11/2

2:40 pm-4:20 am

2 stops47h 40m

Perth

Tue 11/11

5:35 am-1:00 pm

2 stops45h 25m

$1,048

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 8/26

3:20 pm-2:40 pm

2 stops32h 20m

Sydney Kingsford Smith

Tue 9/2

5:45 pm-5:40 am

1 stop26h 55m

$1,059

ChicagoCanberra

ORD - CBR

ORDCBR

Chicago O'Hare Intl

Wed 9/3

3:40 pm-10:10 am

2 stops27h 30m

Canberra

Sat 9/13

6:30 am-7:59 am

3 stops40h 29m

$1,109

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 10/21

3:40 pm-6:10 pm

2 stops35h 00m

Adelaide

Thu 11/13

6:10 am-4:44 pm

2 stops27h 04m

$1,135

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 9/22

6:20 am-7:05 am

2 stops33h 45m

Sydney Kingsford Smith

Wed 10/8

1:10 pm-10:58 pm

2 stops25h 48m

$1,136

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Thu 8/28

6:20 am-12:00 pm

2 stops38h 40m

Melbourne

Sat 9/13

1:30 pm-11:13 pm

2 stops24h 43m

$1,150

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 $1,028). Flying from Chicago to Australia in December is currently the most expensive (average of $1,619). 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 July 29, 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 July 29, 2025.
See what other customers who have flown with Air Tahiti Nui, EVA Air, and ANA 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 Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.6
Very good
68 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
EVA Air
8.4
Very good
1,221 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.4
Very good
922 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very good
1,535 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very good
1,338 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Comfort

8.0

Boarding

8.7

Crew

9.0

Entertainment

7.2

Food

7.7

Overall

8.6

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

  • What are the cheapest airlines to fly from Chicago to Australia one-way?

    The cheapest airlines for a one-way flight from Chicago to Australia are Fiji Airways ($653), Qatar Airways ($738), and Qantas Airways ($767).

  • 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 $1,028). Flying from Chicago to Australia in December is currently the most expensive (average of $1,619). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 9 airlines flying from Chicago to Australia

Discover the top 9 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$647Average$1,189FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,177FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$936FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$772Average$1,432FlexibilityNo cancel feeOn-time74%
DeltaCheapest$851Average$978FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$953Average$1,302FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,164Average$1,546FlexibilityNo cancel feeOn-time69%
Air New ZealandCheapest$1,275Average$1,506FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,470Average$1,564FlexibilityNo cancel feeOn-time72%

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