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$423+ 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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
Apr 27 — May 41
Sun 4/27
Sun 5/4
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 April 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$908
(Trip.com)

One-way from

$423
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$877
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 ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 22, 2025.

This Justfly.com deal was found by Cheapflights users on 4/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:15 pmORD - BNE
1 stop22h 45mQantas Airways
Sat 11/157:25 pmBNE - ORD
1 stop19h 35mQantas Airways
Deal found 4/22$894
This Trip.com deal was found by Cheapflights users on 4/21. 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 6/56:10 amORD - CNS
2 stops38h 15mMultiple Airlines
Thu 6/1212:25 pmCNS - ORD
2 stops25h 40mMultiple Airlines
Deal found 4/21$908
This Mytrip deal was found by Cheapflights users on 4/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/511:45 amORD - MEL
3 stops33h 30mMultiple Airlines
Thu 6/1212:55 pmMEL - ORD
3 stops32h 56mMultiple Airlines
Deal found 4/20$982
This Trip.com deal was found by Cheapflights users on 4/21. 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 9/812:10 pmORD - PER
2 stops43h 10mMultiple Airlines
Mon 9/228:30 pmPER - ORD
2 stops56h 15mMultiple Airlines
Deal found 4/21$1,034
This Trip.com deal was found by Cheapflights users on 4/22. 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 6/57:40 amMDW - SYD
2 stops37h 35mMultiple Airlines
Thu 6/121:15 pmSYD - MDW
2 stops37h 36mMultiple Airlines
Deal found 4/22$1,050
This Mytrip deal was found by Cheapflights users on 4/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/511:45 amORD - SYD
3 stops33h 30mMultiple Airlines
Thu 6/121:15 pmSYD - ORD
3 stops32h 36mMultiple Airlines
Deal found 4/22$1,076
This Gurufare deal was found by Cheapflights users on 4/22. 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 11/86:49 pmORD - SYD
2 stops45h 31mQantas Airways
Sat 11/159:35 pmSYD - ORD
2 stops42h 25mQantas Airways
Deal found 4/22$1,119
This Trip.com deal was found by Cheapflights users on 4/22. 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.
Tue 6/36:45 pmORD - SYD
2 stops26h 00mFiji Airways
Tue 6/106:15 amSYD - ORD
2 stops29h 39mFiji Airways
Deal found 4/22$1,164
This Expedia deal was found by Cheapflights users on 4/22. 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.
Sat 11/18:50 amORD - BNE
1 stop29h 10mMultiple Airlines
Fri 11/1412:10 amBNE - ORD
1 stop28h 50mMultiple Airlines
Deal found 4/22$1,176
This StudentUniverse deal was found by Cheapflights users on 4/22. 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.
Tue 8/124:50 pmORD - SYD
2 stops24h 55mAir New Zealand
Tue 8/2611:50 amSYD - ORD
2 stops24h 50mAir New Zealand
Deal found 4/22$1,183
This Gurufare deal was found by Cheapflights users on 4/21. 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.
Tue 10/215:45 pmORD - SYD
1 stop24h 40mANA
Tue 11/412:25 pmSYD - ORD
1 stop35h 55mANA
Deal found 4/21$1,186
This Gurufare deal was found by Cheapflights users on 4/22. 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.
Wed 11/199:50 amORD - PER
2 stops36h 10mQantas Airways
Mon 12/85:20 pmPER - ORD
2 stops34h 55mQantas Airways
Deal found 4/22$1,275

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 April 22, 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

ChicagoCairns

ORD - CNS

ORDCNS

Chicago O'Hare Intl

Thu 6/5

6:10 am-11:25 am

2 stops38h 15m

Cairns

Thu 6/12

12:25 pm-11:05 pm

2 stops25h 40m

$908

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Thu 6/5

11:45 am-12:15 pm

3 stops33h 30m

Melbourne

Thu 6/12

12:55 pm-6:51 am

3 stops32h 56m

$982

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 9/8

12:10 pm-8:20 pm

2 stops43h 10m

Perth

Mon 9/22

8:30 pm-3:45 pm

2 stops56h 15m

$1,034

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Thu 6/5

7:40 am-12:15 pm

2 stops37h 35m

Sydney Kingsford Smith

Thu 6/12

1:15 pm-11:51 am

2 stops37h 36m

$1,050

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 6/5

11:45 am-12:15 pm

3 stops33h 30m

Sydney Kingsford Smith

Thu 6/12

1:15 pm-6:51 am

3 stops32h 36m

$1,076

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 6/3

6:45 pm-11:45 am

2 stops26h 00m

Sydney Kingsford Smith

Tue 6/10

6:15 am-8:54 pm

2 stops29h 39m

$1,164

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 7/21

3:35 pm-8:45 am

2 stops26h 10m

Sydney Kingsford Smith

Thu 7/31

11:50 am-10:59 pm

2 stops26h 09m

$1,227

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 8/6

4:50 pm-10:50 am

2 stops27h 00m

Melbourne

Mon 8/18

8:35 am-10:59 pm

2 stops29h 24m

$1,297

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 7/2

6:53 pm-7:05 am

1 stop21h 12m

Sydney Kingsford Smith

Wed 7/16

5:45 pm-11:43 pm

1 stop20h 58m

$1,308

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 8/6

3:15 pm-6:45 am

1 stop24h 30m

Melbourne

Mon 8/18

9:45 am-5:42 pm

1 stop22h 57m

$1,344

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

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 $1,046). 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 April 22, 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 April 22, 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

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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
1,179 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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
1,062 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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
1,450 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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
847 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Crew

9.1

Entertainment

7.3

Comfort

8.1

Overall

8.8

Boarding

8.7

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 ($683), Air Canada ($754), and Alaska Airlines ($755).

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

    While some choose either Chicago Midway - Sydney Kingsford Smith or Chicago O'Hare Intl - Melbourne, 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 $1,046). 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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$630Average$1,210FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,011FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$939FlexibilityNo cancel feeOn-time71%
DeltaCheapest$852Average$975FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$953Average$1,335FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$1,160Average$1,364FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,164Average$1,619FlexibilityNo cancel feeOn-time69%
Air New ZealandCheapest$1,256Average$1,704FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,305Average$1,517FlexibilityNo cancel feeOn-time72%
Singapore AirlinesCheapest$1,421Average$1,706FlexibilityNo cancel feeOn-time81%

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