Australia

$586+ Cheap flights from O'Hare Intl (ORD) to Australia

ORD — SYD
Dec 9 — Dec 161
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Cheap flight deals from O'Hare Intl to Australia

Cheapest flights from O'Hare Intl to Australia

Fri 12/48:59 am -
3 stops34h 26m
Mon 12/71:35 pm -
3 stops32h 26m
Deal found 11/5$1,161
Sun 11/86:29 am -
2 stops34h 21m
Wed 11/1811:30 am -
2 stops34h 32m
Deal found 11/5$1,307
Fri 12/49:05 pm -
1 stop40h 20m
Fri 12/117:15 pm -
2 stops38h 00m
Deal found 11/4$1,339
Thu 12/37:00 am -
3 stops37h 50m
Thu 12/101:10 pm -
2 stops27h 44m
Deal found 11/5$1,340
Tue 12/12:22 pm -
2 stops25h 13m
Tue 1/2611:50 am -
2 stops25h 45m
Deal found 11/8$1,344
Sun 11/85:30 am -
2 stops34h 05m
Wed 11/182:05 pm -
2 stops23h 32m
Deal found 11/6$1,346
Wed 12/27:00 am -
2 stops34h 35m
Mon 1/252:05 pm -
2 stops23h 33m
Deal found 11/8$1,351
Thu 12/37:00 am -
2 stops33h 30m
Thu 12/106:45 am -
3 stops35h 09m
Deal found 11/4$1,356
Sat 12/127:50 pm -
2 stops48h 00m
Wed 1/2711:50 am -
2 stops24h 05m
Deal found 11/8$1,356
Thu 12/37:00 am -
2 stops33h 30m
Mon 12/76:45 am -
3 stops39h 16m
Deal found 11/5$1,358
Tue 12/12:22 pm -
2 stops27h 13m
Sat 12/57:25 pm -
2 stops42h 12m
Deal found 11/5$1,364
Mon 11/165:30 am -
2 stops34h 05m
Wed 11/257:25 pm -
2 stops42h 12m
Deal found 11/6$1,365

Find flight deals from O'Hare Intl to Australia

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,161
(Trip.com)

One-way from

$586
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$1,483
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. 4% potential increase in price ($76 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($47 potential savings vs. average RT price).
Average for round-trip flights in November 2026

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 3/15

7:35 am-7:30 am

2 stops31h 55m

Melbourne

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$614

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Mon 3/1

6:29 am-7:30 am

2 stops32h 01m

Melbourne

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$614

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 3/17

6:29 am-9:50 am

2 stops35h 21m

Sydney Kingsford Smith

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$617

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 3/24

7:35 am-9:50 am

2 stops34h 15m

Sydney Kingsford Smith

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$617

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Thu 2/25

8:50 pm-9:50 am

2 stops44h 00m

Sydney Kingsford Smith

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$653

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 2/2

8:00 am-6:25 am

2 stops29h 25m

Sydney Kingsford Smith

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$655

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 3/5

5:00 am-9:50 am

2 stops35h 50m

Sydney Kingsford Smith

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$656

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 3/4

2:10 pm-4:55 am

2 stops45h 45m

Melbourne

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$660

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Wed 11/25

6:40 am-7:30 am

2 stops31h 50m

Melbourne

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$679

ChicagoMelbourne

ORD Chicago O'Hare Intl - MEL Melbourne

ORDMEL

Chicago O'Hare Intl

Thu 11/26

6:40 am-7:30 am

2 stops31h 50m

Melbourne

Wed 12/31

12:00 am-8:00 am

Nonstop0h 00m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Australia (average of $1,160). Flying from Chicago O'Hare Intl Airport to Australia in December is currently the most expensive (average of $1,896). 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.

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Australia?

The price you pay for your flight from Chicago O'Hare Intl Airport to Australia may vary depending on when you book. For the best chance of a lower fare, look to book 37 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Australia

Peruse reviews from past customers who have flown with Delta,Qantas Airways, andUnited 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

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.8

Comfort

7.8

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Related info for your journey

  • 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 27h 45m. Fly via Air New Zealand, Qatar Airways, or Alaska Airlines to get the fastest option. Chicago O'Hare Intl Airport and Australia are separated by a distance of 9250 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Australia one-way?

    The cheapest airline one-way is Qantas Airways, with whom users have recently found tickets for as low as $694. However, be on the lookout for offers from ANA and United Airlines, as they are both options that can get you from Chicago O'Hare Intl Airport to Australia for a low price.

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Australia (average of $1,160). Flying from Chicago O'Hare Intl Airport to Australia in December is currently the most expensive (average of $1,896). 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

Top 10 airlines flying from O'Hare Intl to Australia

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$237Average$1,360FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$712Average$1,271FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$716Average$819FlexibilityNo cancel feeOn-time74%
Qantas AirwaysCheapest$911Average$1,602FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,144Average$1,625FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,166Average$1,727FlexibilityNo cancel feeOn-time71%
ANACheapest$1,209Average$1,270FlexibilityNo cancel feeOn-time80%
Qatar AirwaysCheapest$1,218Average$1,618FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,279Average$1,629FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,560Average$1,890FlexibilityNo cancel feeOn-time72%

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