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$522+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
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Cheap 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 December 14, 2025.

This oojo deal was found by Cheapflights users on 12/13. 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.
Tue 12/304:46 pmORD - SYD
2 stops26h 09mQantas Airways
Tue 1/1311:20 amSYD - ORD
1 stop29h 39mQantas Airways
Deal found 12/13$1,101
This Justfly.com deal was found by Cheapflights users on 12/13. 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.
Mon 12/224:34 pmORD - MEL
1 stop23h 56mQantas Airways
Wed 1/74:40 pmMEL - ORD
2 stops39h 17mQantas Airways
Deal found 12/13$1,151
This oojo deal was found by Cheapflights users on 12/12. 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.
Mon 12/227:47 pmORD - SYD
2 stops26h 03mQantas Airways
Mon 12/2911:20 amSYD - ORD
1 stop26h 49mQantas Airways
Deal found 12/12$1,251
This oojo deal was found by Cheapflights users on 12/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:46 pmORD - SYD
2 stops35h 04mQantas Airways
Fri 1/911:20 amSYD - ORD
1 stop20h 37mQantas Airways
Deal found 12/11$1,275
This oojo deal was found by Cheapflights users on 12/13. 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.
Tue 12/302:50 pmORD - SYD
2 stops31h 00mQantas Airways
Sun 1/118:55 amSYD - ORD
2 stops23h 02mQantas Airways
Deal found 12/13$1,321
This oojo deal was found by Cheapflights users on 12/13. 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.
Mon 12/292:50 pmORD - SYD
2 stops28h 05mQantas Airways
Mon 1/127:05 amSYD - ORD
2 stops24h 52mQantas Airways
Deal found 12/13$1,459
This Qantas Airways deal was found by Cheapflights users on 12/12. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:50 pmORD - SYD
2 stops28h 05mQantas Airways
Wed 1/77:15 pmSYD - ORD
2 stops35h 40mQantas Airways
Deal found 12/12$1,520
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:50 pmORD - SYD
2 stops30h 35mQantas Airways
Sat 1/107:05 amSYD - ORD
2 stops24h 52mQantas Airways
Deal found 12/11$1,544
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/247:44 pmORD - MEL
1 stop44h 46mMultiple Airlines
Mon 3/210:35 pmMEL - ORD
3 stops53h 55mMultiple Airlines
Deal found 12/14$1,561
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/247:44 pmORD - MEL
1 stop44h 46mMultiple Airlines
Tue 3/2411:25 amMEL - ORD
3 stops41h 05mMultiple Airlines
Deal found 12/14$1,564
This Qantas Airways deal was found by Cheapflights users on 12/13. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:34 pmORD - SYD
2 stops29h 16mQantas Airways
Sat 1/107:05 amSYD - ORD
2 stops24h 52mQantas Airways
Deal found 12/13$1,589
This Kiwi.com deal was found by Cheapflights users on 12/14. 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.
Thu 12/256:00 amORD - MEL
2 stops34h 30mMultiple Airlines
Wed 3/2512:00 pmMEL - ORD
1 stop33h 29mMultiple Airlines
Deal found 12/14$1,661

Find flight deals from Chicago to Australia

Keep the following information in mind while searching for Chicago to Australia flight deals. Data was last updated December 14, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$886
(BestPriceTravel)

One-way from

$522
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,388
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
Search Deals
From Chicago (CHI) to Australia
Search Deals
One-way flight from Chicago (CHI) to Australia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 14, 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

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 2/10

1:05 pm-8:45 am

1 stop27h 40m

Brisbane

Sun 2/22

10:45 am-2:41 pm

1 stop19h 56m

$957

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 1/28

8:45 am-8:45 am

2 stops32h 00m

Brisbane

Sun 2/8

10:45 am-2:41 pm

1 stop19h 56m

$957

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Mon 1/26

8:45 am-8:45 am

2 stops32h 00m

Brisbane

Mon 2/2

10:45 am-5:08 pm

2 stops46h 23m

$959

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 2/10

8:45 am-8:45 am

2 stops32h 00m

Brisbane

Sun 2/22

6:05 am-2:41 pm

2 stops24h 36m

$979

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Tue 1/27

3:35 pm-10:30 pm

2 stops38h 25m

Adelaide

Tue 2/3

6:10 am-4:42 pm

2 stops27h 02m

$991

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 2/18

3:35 pm-8:45 am

1 stop25h 10m

Brisbane

Fri 2/27

10:45 am-4:38 pm

1 stop21h 53m

$1,000

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 6/2

7:35 pm-7:05 am

1 stop20h 30m

Brisbane

Tue 6/16

10:00 am-12:50 pm

2 stops41h 50m

$1,021

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 1/15

3:35 pm-8:45 am

1 stop25h 10m

Brisbane

Sat 1/31

10:45 am-2:41 pm

1 stop19h 56m

$1,042

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 1/21

6:40 pm-5:15 pm

2 stops29h 35m

Melbourne

Thu 1/29

12:00 pm-9:23 pm

1 stop26h 23m

$1,094

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Thu 2/5

6:40 pm-1:40 pm

2 stops26h 30m

Adelaide

Wed 3/4

4:10 pm-11:40 pm

2 stops24h 00m

$1,122

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

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, August is the cheapest month in which you can book a flight from Chicago to Australia (average of $198). Flying from Chicago to Australia in December is currently the most expensive (average of $851). 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 December 14, 2025.

It’s typically best to fly out from Chicago to Australia at noon. Doing so could potentially save you 22% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Chicago to Australia?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Australia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Australia flight should consider departing on Friday mornings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 14, 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
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess
Air New Zealand
8.0
Very good
552 reviews
Air New Zealand
8.0
Very good
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess
Qantas Airways
7.5
Good
946 reviews
Air New Zealand
8.0
Very good
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess
United Airlines
7.4
Good
9,092 reviews
Air New Zealand
8.0
Very good
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess
American Airlines
7.2
Good
11,051 reviews
Air New Zealand
8.0
Very good
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess
Air Canada
7.1
Good
10,525 reviews
Air New Zealand
8.0
Very good
552 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Crew

8.5

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LAX - ORD

Overall good experience with united . I fly united most part so nothing out of obvious i guess

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 24h 24m. Fly via Air Canada, Qantas Airways, or Delta to get the fastest option. The distance from Chicago to Australia is about 9234 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 ANA ($304), Qantas Airways ($344), and American Airlines ($352).

  • 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, August is the cheapest month in which you can book a flight from Chicago to Australia (average of $198). Flying from Chicago to Australia in December is currently the most expensive (average of $851). 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

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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 December 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$675Average$1,157FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,209FlexibilityNo cancel feeOn-time80%
Fiji AirwaysCheapest$772Average$1,422FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$796Average$885FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$851Average$1,238FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$870Average$1,671FlexibilityNo cancel feeOn-time69%
DeltaCheapest$935Average$1,034FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$1,229Average$2,092FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,264Average$1,512FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,418Average$1,773FlexibilityNo cancel feeOn-time72%

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