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$418+ 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SYD
nov 29 — dez 61
sáb 11/29
sáb 12/6
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 outubro 30, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$809
(Air Canada)

One-way from

$418
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$907
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. 18% potential increase in price ($210 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in October 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 outubro 30, 2025.

This Orbitz deal was found by Cheapflights users on 10/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 12/23:40 pmORD - SYD
1 stop22h 15mAir Canada
ter 12/1611:20 amSYD - ORD
2 stops34h 40mAir Canada
Deal found 10/30$847
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 12/113:40 pmORD - SYD
1 stop22h 15mAir Canada
qui 12/254:00 pmSYD - ORD
1 stop39h 41mAir Canada
Deal found 10/30$849
This Orbitz deal was found by Cheapflights users on 10/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 11/158:18 pmORD - SYD
2 stops44h 17mMultiple Airlines
seg 11/249:20 pmSYD - ORD
2 stops34h 21mMultiple Airlines
Deal found 10/28$851
This SmartFares deal was found by Cheapflights users on 10/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 11/303:40 pmORD - SYD
1 stop24h 55mAir Canada
dom 12/1411:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/30$852
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 11/168:00 pmORD - SYD
2 stops44h 35mAir Canada
ter 12/1611:20 amSYD - ORD
2 stops41h 09mAir Canada
Deal found 10/30$854
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 11/175:55 pmORD - SYD
3 stops46h 40mAir Canada
ter 12/1611:20 amSYD - ORD
2 stops41h 09mAir Canada
Deal found 10/30$855
This Orbitz deal was found by Cheapflights users on 10/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/13:40 pmORD - SYD
2 stops33h 25mMultiple Airlines
sex 12/58:30 amSYD - ORD
2 stops23h 11mMultiple Airlines
Deal found 10/30$861
This Travelocity deal was found by Cheapflights users on 10/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 12/73:40 pmORD - SYD
2 stops33h 25mAir Canada
dom 12/1411:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/30$862
This Expedia deal was found by Cheapflights users on 10/29. 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.
sex 11/283:40 pmORD - SYD
1 stop24h 55mAir Canada
sex 12/58:30 amSYD - ORD
2 stops23h 11mAir Canada
Deal found 10/29$864
This Orbitz deal was found by Cheapflights users on 10/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 12/33:40 pmORD - SYD
2 stops31h 15mMultiple Airlines
sáb 12/137:15 pmSYD - ORD
2 stops36h 26mMultiple Airlines
Deal found 10/29$869
This oojo deal was found by Cheapflights users on 10/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 12/66:17 pmORD - MEL
2 stops29h 58mQantas Airways
seg 1/1212:00 pmMEL - ORD
1 stop28h 59mQantas Airways
Deal found 10/30$1,094
This Justfly.com deal was found by Cheapflights users on 10/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 11/253:40 pmORD - BNE
2 stops47h 50mQantas Airways
qui 12/2512:10 pmBNE - ORD
1 stop19h 23mQantas Airways
Deal found 10/30$1,101

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 outubro 30, 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

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

ter 2/17

3:40 pm-10:30 pm

2 stops38h 20m

Adelaide

sex 2/27

6:10 am-4:38 pm

2 stops26h 58m

$811

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

seg 1/26

2:15 pm-9:30 am

1 stop26h 15m

Melbourne

seg 2/16

6:45 am-5:41 pm

2 stops27h 56m

$1,044

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

ter 11/25

8:45 am-8:45 am

2 stops32h 00m

Brisbane

qui 12/25

10:45 am-2:41 pm

1 stop19h 56m

$1,133

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

qui 4/2

3:45 pm-7:05 am

2 stops48h 20m

Brisbane

dom 4/12

10:00 am-8:05 am

2 stops37h 05m

$1,133

ChicagoMelbourne

ORD - AVV

ORDAVV

Chicago O'Hare Intl

seg 1/26

3:40 pm-3:50 pm

2 stops31h 10m

Melbourne Avalon

seg 2/16

6:00 am-2:41 pm

2 stops25h 41m

$1,191

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

seg 1/26

3:40 pm-2:15 pm

2 stops29h 35m

Melbourne

seg 2/16

8:10 am-2:41 pm

2 stops23h 31m

$1,227

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

ter 1/27

3:40 pm-2:15 pm

2 stops29h 35m

Melbourne

qua 2/18

8:00 am-7:30 pm

3 stops28h 30m

$1,233

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

seg 12/8

6:35 pm-7:30 am

1 stop20h 55m

Brisbane

seg 12/15

11:40 am-2:48 pm

1 stop19h 08m

$1,259

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

dom 11/16

1:28 pm-5:00 am

2 stops23h 32m

Brisbane

dom 11/23

9:40 am-2:33 pm

2 stops20h 53m

$1,259

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

seg 11/10

12:45 pm-7:00 am

1 stop25h 15m

Sydney Kingsford Smith

qua 11/19

12:10 pm-2:50 pm

1 stop19h 40m

$1,263

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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 October is currently the most expensive (average of $835). 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 outubro 30, 2025.

It’s typically best to fly out from Chicago to Australia at noon. Doing so could potentially save you 21% 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 outubro 30, 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
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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
520 reviews
Air New Zealand
8.0
Very good
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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
925 reviews
Air New Zealand
8.0
Very good
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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
8,998 reviews
Air New Zealand
8.0
Very good
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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
11,032 reviews
Air New Zealand
8.0
Very good
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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
10,378 reviews
Air New Zealand
8.0
Very good
520 reviews

Comfort

8.0

Entertainment

7.5

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

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 20h 55m. Fly via Air Canada, Qantas Airways, or United Airlines to get the fastest option. The distance from Chicago to Australia is about 8897 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 Delta ($851), United Airlines ($871), and Qantas Airways ($1,186).

  • 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 October is currently the most expensive (average of $835). 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 outubro 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$673Average$1,338FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,193FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$938FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$772Average$1,422FlexibilityNo cancel feeOn-time74%
DeltaCheapest$846Average$1,018FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$871Average$1,683FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$872Average$1,270FlexibilityNo cancel feeOn-time67%
Qatar AirwaysCheapest$1,229Average$1,331FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,264Average$1,531FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,470Average$2,048FlexibilityNo cancel feeOn-time72%

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