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$439+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,155
(Kiwi.com)

One-way from

$508
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$915
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
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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. 12% potential increase in price ($157 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:50 amORD - BNE
1 stop27h 10mQantas Airways
Mon 12/159:45 amBNE - ORD
1 stop20h 30mQantas Airways
Deal found 4/30$900
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:40 amORD - BNE
2 stops25h 20mAmerican Airlines
Thu 12/257:25 pmBNE - ORD
1 stop19h 45mAmerican Airlines
Deal found 4/29$927
This StudentUniverse deal was found by Cheapflights users on 4/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:40 amORD - SYD
2 stops32h 10mQantas Airways
Fri 11/145:30 pmSYD - ORD
2 stops22h 30mQantas Airways
Deal found 4/30$1,081
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Wed 6/117:51 pmORD - SYD
2 stops51h 49mMultiple Airlines
Wed 6/185:45 pmSYD - ORD
1 stop28h 06mMultiple Airlines
Deal found 4/30$1,155
This Gurufare deal was found by Cheapflights users on 4/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:25 pmORD - BNE
1 stop24h 05mMultiple Airlines
Fri 11/1412:10 amBNE - ORD
1 stop28h 50mMultiple Airlines
Deal found 4/30$1,162
This Trip.com deal was found by Cheapflights users on 4/30. 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.
Sat 6/146:10 amORD - MEL
2 stops39h 05mMultiple Airlines
Sat 6/211:40 pmMEL - ORD
2 stops24h 25mMultiple Airlines
Deal found 4/30$1,168
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:03 pmORD - BNE
2 stops24h 22mFiji Airways
Sat 10/2511:40 amBNE - ORD
2 stops24h 22mFiji Airways
Deal found 4/29$1,184
This CrystalTravel deal was found by Cheapflights users on 4/29. 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.
Tue 10/215:45 pmORD - SYD
1 stop34h 30mANA
Fri 10/3112:25 pmSYD - ORD
2 stops32h 38mANA
Deal found 4/29$1,186
This StudentUniverse deal was found by Cheapflights users on 4/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/173:35 pmORD - SYD
2 stops26h 10mAir New Zealand
Mon 9/19:55 amSYD - ORD
2 stops28h 20mAir New Zealand
Deal found 4/30$1,196
This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:23 pmORD - MEL
2 stops28h 57mQantas Airways
Tue 11/183:05 pmMEL - ORD
2 stops24h 55mQantas Airways
Deal found 4/28$1,201
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Sat 11/223:40 pmORD - BNE
1 stop25h 00mAir Canada
Sat 11/2910:45 amBNE - ORD
1 stop19h 54mAir Canada
Deal found 4/29$1,202
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/292:10 pmORD - PER
2 stops40h 40mMultiple Airlines
Sat 11/84:40 amPER - ORD
2 stops41h 35mMultiple Airlines
Deal found 4/29$1,261

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 May 1, 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

Wed 6/11

7:51 pm-2:40 pm

2 stops51h 49m

Sydney Kingsford Smith

Wed 6/18

5:45 pm-6:51 am

1 stop28h 06m

$1,155

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Sat 6/14

6:10 am-12:15 pm

2 stops39h 05m

Melbourne

Sat 6/21

1:40 pm-11:05 pm

2 stops24h 25m

$1,168

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 10/18

7:03 pm-10:25 am

2 stops24h 22m

Brisbane

Sat 10/25

11:40 am-9:02 pm

2 stops24h 22m

$1,184

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/21

5:45 pm-8:15 pm

1 stop34h 30m

Sydney Kingsford Smith

Fri 10/31

12:25 pm-5:03 am

2 stops32h 38m

$1,186

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/17

4:50 pm-8:45 am

2 stops24h 55m

Sydney Kingsford Smith

Mon 9/1

11:50 am-11:15 pm

2 stops26h 25m

$1,196

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Tue 10/21

4:25 pm-10:50 am

2 stops26h 25m

Melbourne

Tue 11/11

8:35 am-8:22 pm

2 stops28h 47m

$1,265

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 10/18

7:03 pm-12:45 pm

2 stops25h 42m

Sydney Kingsford Smith

Sat 10/25

2:45 pm-9:02 pm

2 stops22h 17m

$1,269

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 10/22

11:45 pm-8:25 pm

2 stops52h 40m

Melbourne

Wed 11/12

8:40 pm-6:25 pm

2 stops38h 45m

$1,310

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 9/17

4:00 pm-10:50 am

1 stop27h 50m

Sydney Kingsford Smith

Tue 9/30

9:50 pm-2:25 pm

1 stop31h 35m

$1,320

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Mon 5/19

6:59 pm-10:35 am

2 stops24h 36m

Brisbane

Thu 10/9

11:40 am-11:31 pm

2 stops26h 51m

$1,325

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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, March is the cheapest month in which you can book a flight from Chicago to Australia (average of $1,043). Flying from Chicago to Australia in December is currently the most expensive (average of $1,643). 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 May 1, 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.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 May 1, 2025.
Read through reviews of airlines operating flights from Chicago to Australia, such as Air Tahiti Nui, EVA Air and Korean Air. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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
1,186 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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.
Korean Air
8.4
Very good
1,068 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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
1,459 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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
8.3
Very good
852 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Boarding

8.7

Overall

8.8

Entertainment

7.3

Crew

9.1

Comfort

8.1

Food

7.8

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 ($722), Alaska Airlines ($797), and Qantas Airways ($809).

  • 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, March is the cheapest month in which you can book a flight from Chicago to Australia (average of $1,043). Flying from Chicago to Australia in December is currently the most expensive (average of $1,643). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$630Average$1,247FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,011FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$940FlexibilityNo cancel feeOn-time71%
DeltaCheapest$852Average$981FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$953Average$1,335FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$1,021Average$1,477FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,164Average$1,615FlexibilityNo cancel feeOn-time69%
Air New ZealandCheapest$1,235Average$1,728FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,305Average$1,524FlexibilityNo cancel feeOn-time72%
Singapore AirlinesCheapest$1,421Average$1,706FlexibilityNo cancel feeOn-time81%

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