Australia

$413+ Cheap flights from O'Hare Intl (ORD) 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
nov. 21 — nov. 281
We work with more than 300 partners to bring you better travel deals

Find cheap flights from O'Hare Intl to Australia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from O'Hare Intl to Australia

Keep the following information in mind while searching for O'Hare Intl to Australia flight deals. Data was last updated octubre 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$770
(Gotogate)

One-way from

$413
(Yatra.com)

Popular in

December

Cheapest in

August

Average price

$907
Provider with most accurate pricing for Chicago (CHI)-Sydney Kingsford Smith flight deals.
Provider most trusted by Cheapflights users for Chicago (CHI)-Sydney Kingsford Smith flights.
From Chicago O'Hare Intl to Australia
One-way flight from Chicago O'Hare Intl to Australia
Highest demand for flights based on searches. 17% potential increase in price ($197 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Average for round-trip flights in October 2025

Find flight deals from O'Hare Intl to Australia

Cheapest flights from O'Hare Intl to Australia
Explore the most affordable flight options available from O'Hare Intl to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 22, 2025.

This Gotogate deal was found by Cheapflights users on 10/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/73:40 pmORD - SYD
1 stop24h 55mAir Canada
mar. 12/2311:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/20$770
This Orbitz deal was found by Cheapflights users on 10/19. 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.
lun. 11/109:30 pmORD - SYD
2 stops43h 05mAir Canada
dom. 12/2111:20 amSYD - ORD
2 stops28h 40mAir Canada
Deal found 10/19$778
This Orbitz deal was found by Cheapflights users on 10/19. 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.
dom. 12/73:40 pmORD - SYD
1 stop24h 55mMultiple Airlines
sáb. 12/276:35 pmSYD - ORD
2 stops37h 06mMultiple Airlines
Deal found 10/19$791
This BestPriceTravel deal was found by Cheapflights users on 10/20. 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 BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/43:11 pmORD - SYD
1 stop24h 49mQantas Airways
jue. 12/1111:20 amSYD - ORD
1 stop22h 34mQantas Airways
Deal found 10/20$812
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
mié. 12/311:39 pmORD - SYD
1 stop26h 21mQantas Airways
mar. 1/2011:20 amSYD - ORD
1 stop22h 29mQantas Airways
Deal found 10/19$820
This CrystalTravel deal was found by Cheapflights users on 10/19. 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.
jue. 11/133:00 pmORD - SYD
1 stop25h 00mQantas Airways
mié. 12/35:45 pmSYD - ORD
1 stop23h 14mQantas Airways
Deal found 10/19$823
This Air Canada deal was found by Cheapflights users on 10/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/78:45 amORD - SYD
2 stops31h 50mAir Canada
dom. 12/2111:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/20$826
This Cheapflightsfares deal was found by Cheapflights users on 10/19. 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.
lun. 11/106:03 pmORD - SYD
1 stop21h 57mQantas Airways
dom. 12/2111:20 amSYD - ORD
1 stop29h 20mQantas Airways
Deal found 10/19$834
This American Airlines deal was found by Cheapflights users on 10/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/171:49 pmORD - SYD
1 stop26h 11mAmerican Airlines
mar. 12/25:45 pmSYD - ORD
1 stop20h 31mAmerican Airlines
Deal found 10/20$835
This Cheapflightsfares deal was found by Cheapflights users on 10/19. 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.
sáb. 11/2211:40 amORD - SYD
1 stop28h 20mQantas Airways
mar. 12/3011:20 amSYD - ORD
1 stop29h 20mQantas Airways
Deal found 10/19$836
This Aunt Betty deal was found by Cheapflights users on 10/22. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/66:17 pmORD - ADL
2 stops28h 58mQantas Airways
sáb. 12/137:50 amADL - ORD
2 stops25h 34mQantas Airways
Deal found 10/22$849
This oojo deal was found by Cheapflights users on 10/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/58:46 pmORD - ADL
2 stops48h 24mQantas Airways
vie. 12/128:55 pmADL - ORD
2 stops36h 29mQantas Airways
Deal found 10/22$922

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 octubre 22, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Australia that are best for you.

Fly from

O'Hare Intl

Fly to

Australia

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

jue. 4/2

4:40 pm-8:00 am

1 stop23h 20m

Sydney Kingsford Smith

dom. 4/12

9:30 am-8:22 pm

1 stop25h 52m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 3/25

4:10 pm-6:20 am

1 stop22h 10m

Sydney Kingsford Smith

lun. 4/6

9:30 am-9:13 pm

2 stops26h 43m

$855

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 3/17

8:53 am-7:00 am

1 stop30h 07m

Sydney Kingsford Smith

jue. 4/2

10:30 am-11:57 pm

2 stops29h 27m

$858

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 11/9

3:43 pm-7:00 am

1 stop22h 17m

Sydney Kingsford Smith

dom. 11/16

11:50 am-5:08 pm

1 stop22h 18m

$871

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 11/3

1:00 pm-9:05 am

1 stop27h 05m

Sydney Kingsford Smith

dom. 11/16

11:20 am-2:25 pm

1 stop20h 05m

$871

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 11/3

3:43 pm-7:00 am

1 stop22h 17m

Sydney Kingsford Smith

vie. 11/14

12:10 pm-4:55 pm

1 stop21h 45m

$874

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 11/16

10:36 am-7:00 am

1 stop27h 24m

Sydney Kingsford Smith

vie. 11/28

11:20 am-2:25 pm

1 stop20h 05m

$874

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 4/1

3:51 pm-8:00 am

1 stop24h 09m

Sydney Kingsford Smith

jue. 4/30

9:30 am-8:22 pm

1 stop25h 52m

$874

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 11/19

10:35 am-9:05 am

2 stops29h 30m

Sydney Kingsford Smith

mié. 11/26

12:10 pm-6:50 pm

2 stops23h 40m

$875

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

dom. 3/1

4:45 pm-10:55 am

2 stops25h 40m

Adelaide

sáb. 3/28

7:50 am-9:07 pm

2 stops28h 47m

$886

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from O'Hare Intl to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from O'Hare Intl 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 O'Hare Intl Airport to Australia

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Australia?

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Australia (average of $198). Flying from Chicago O'Hare Intl Airport to Australia in October is currently the most expensive (average of $825). 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 ORD to AU?

Find hourly flight availability from O'Hare Intl 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 octubre 22, 2025.

One of the essential ways to save on airfare from Chicago O'Hare Intl Airport to Australia is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 20% on airfare.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Australia?

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

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport 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 octubre 22, 2025.
Peruse reviews from past customers who have flown with Fiji Airways, Qantas Airways, and United Airlines from Chicago O'Hare Intl Airport to Australia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Food

7.5

Comfort

8.0

Entertainment

7.4

Crew

8.5

Overall

8.0

Boarding

8.1

Reviews

1 / 16
6.0
Good

Christopher,Jun 2025

LAX - NAN

No attempt to make you comfortable. All they care about is how can they pack more people on the plane and how can they charge you for as much as possible. I find it invasive and discriminatory that you weigh my carryon (or any of my naggage frankly). If I physically weighed 15kilos more and my bag weighed under your stupid and arbitrary weight limit I would not be charged... but if I'm a person who is skinny and weighs less, well heaven forbid my bag is 1 kilo heavier than you wish!! $$$ VERY VERY DISCRIMINATORY POLICY!! NEXT TIME I'LL TRY TO EAT MY BAGGAGE SO THAT I CAN TAKE ON AS MUCH WEIGHT AS I WANT! Yeah... sounds ridiculous doesn't it!? No more ridiculous than you charging more for people who bring more baggage weight while letting obese people carry on all the weight they want! It just proves it has absolutely nothing to do with safety, or even your operating costs... Just squeezing as much money out of us as possible!!

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 O'Hare Intl Airport to Australia?

    There are many flights that can get you from Chicago O'Hare Intl Airport to Australia in 23h 20m. Fly via United Airlines, American Airlines, or Qantas Airways to get the fastest option. Chicago O'Hare Intl Airport and Australia are separated by a distance of 9228 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Chicago O'Hare Intl Airport to Australia?

  • Can I find deals for flights from O'Hare Intl to Australia that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Australia.

  • Can I find deals for business class flights from O'Hare Intl to Australia?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 O'Hare Intl Airport to Australia?

    Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Australia (average of $198). Flying from Chicago O'Hare Intl Airport to Australia in October is currently the most expensive (average of $825). 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.

Top 10 airlines flying from O'Hare Intl to Australia

Discover the top 10 airlines that operate flights from O'Hare Intl 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 octubre 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$630Average$1,333FlexibilityNo cancel feeOn-time74%
ANACheapest$679Average$1,193FlexibilityNo cancel feeOn-time80%
American AirlinesCheapest$679Average$937FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$772Average$1,422FlexibilityNo cancel feeOn-time74%
DeltaCheapest$846Average$1,018FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$872Average$1,280FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,169Average$1,569FlexibilityNo cancel feeOn-time69%
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%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.