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$461+ Cheap flights from O'Hare Intl (ORD) to Sydney (SYD)

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Sydney Kingsford Smith are usually found in March or May, booked 39 days in advance, depart on a Saturday or Sunday and return on a Monday

Cheap flight deals from O'Hare Intl to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2025.

Round-trip from

$1,028
(Trip.com)

One-way from

$461
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,357
From Chicago O'Hare Intl to Sydney Kingsford Smith
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One-way flight from Chicago O'Hare Intl to Sydney Kingsford Smith
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Highest demand for flights based on searches. 11% potential increase in price ($143 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from O'Hare Intl to Sydney

Cheapest flights from O'Hare Intl to Sydney
Explore the most affordable flight options available from O'Hare Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:45 amORD - SYD
2 stops31h 50mAir Canada
Mon 11/2411:20 amSYD - ORD
1 stop22h 24mAir Canada
Deal found 7/28$837
This Trip.com deal was found by Cheapflights users on 7/26. 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 10/2010:11 amORD - SYD
2 stops29h 19mMultiple Airlines
Sun 11/22:20 pmSYD - ORD
2 stops26h 39mMultiple Airlines
Deal found 7/26$1,028
This CrystalTravel deal was found by Cheapflights users on 7/27. 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.
Mon 11/244:25 pmORD - SYD
1 stop25h 05mANA
Sun 12/79:45 pmSYD - ORD
1 stop26h 35mANA
Deal found 7/27$1,153
This oojo deal was found by Cheapflights users on 7/25. 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 8/196:20 pmORD - SYD
2 stops26h 25mFiji Airways
Tue 9/91:15 pmSYD - ORD
2 stops23h 09mFiji Airways
Deal found 7/25$1,232

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl to Sydney 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 July 28, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.

Fly from

O'Hare Intl

Fly to

Sydney

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 10/26

8:45 am-8:35 am

2 stops31h 50m

Sydney Kingsford Smith

Mon 11/24

11:20 am-4:44 pm

1 stop22h 24m

$837

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/20

10:11 am-7:30 am

2 stops29h 19m

Sydney Kingsford Smith

Sun 11/2

2:20 pm-12:59 am

2 stops26h 39m

$1,028

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/20

5:45 pm-10:25 am

1 stop24h 40m

Sydney Kingsford Smith

Tue 11/4

9:45 pm-7:20 am

1 stop26h 35m

$1,153

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 8/19

6:20 pm-11:45 am

2 stops26h 25m

Sydney Kingsford Smith

Tue 9/9

1:15 pm-9:24 pm

2 stops23h 09m

$1,232

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/21

8:20 am-3:40 pm

3 stops39h 20m

$461

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/21

5:45 pm-10:25 am

1 stop24h 40m

$691

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 9/29

7:01 pm-11:45 am

2 stops25h 44m

$736

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 9/29

7:01 pm-7:05 am

1 stop21h 04m

$816

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 10/1

7:10 am-6:35 am

2 stops32h 25m

$851

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 8/1

8:42 pm-7:45 pm

2 stops32h 03m

$897

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 17 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Sydney. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Sydney, you should look to book at least 39 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,028). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $1,619). 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 SYD?

Find hourly flight availability from O'Hare Intl to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Sydney in the afternoon. Doing so could potentially save you 17% on the flight price compared to flying in the evening, which is usually more expensive.

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

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

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Sydney flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What’s the top layover airport for flights from Chicago O'Hare Intl Airport to Sydney?

Share of 1-stop round-trip flights from Chicago O'Hare Intl Airport to Sydney chosen by Cheapflights users in the past 12 months, using the same layover each way.

Los Angeles (LAX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago O'Hare Intl Airport to Sydney on Cheapflights.

What’s the cheapest layover airport for flights from Chicago O'Hare Intl Airport to Sydney?

Average round-trip fare for 1-stop flights from Chicago O'Hare Intl Airport to Sydney, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Dallas (DFW) is the most affordable 1-stop option, with an average round-trip price of $889.

What’s the fastest layover option from Chicago O'Hare Intl Airport to Sydney?

Shortest average travel time for 1-stop one-way flights from Chicago O'Hare Intl Airport to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 18h 17m.

Which airport typically offers the quickest layover for flights from Chicago O'Hare Intl Airport to Sydney?

Average layover duration for 1-stop one-way flights from Chicago O'Hare Intl Airport to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dallas (DFW) offer the fastest connection on this route, with an average layover time of 1h 32m.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated July 28, 2025.
Read reviews from past customers who have flown Air Tahiti Nui, ANA, and Japan Airlines from Chicago O'Hare Intl Airport to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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
8.6
Very good
68 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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
8.4
Very good
922 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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
1,535 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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.
Alaska Airlines
8.0
Very good
10,000 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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.
Fiji Airways
8.0
Very good
202 reviews
Air Tahiti Nui
8.6
Very good
68 reviews

Overall

8.6

Food

7.7

Boarding

8.7

Crew

9.0

Entertainment

7.2

Comfort

8.0

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 O'Hare Intl to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Chicago O'Hare Intl?

    If you book a flight to Sydney from Chicago O'Hare Intl, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney. There are 0 flights from Chicago O'Hare Intl to Kingsford Smith per day from 8 different airlines.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Sydney round-trip?

    Flying on ANA is currently your cheapest option to Sydney, with prices starting at $1,153. Another option worth looking into is Fiji Airways, starting at $1,232 round trip.

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

    One-way options have recently been found by users for as low as $691 on ANA. Other airlines that offer cheap prices include Fiji Airways from $736 and Qantas Airways from $816 one-way.

  • Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to Sydney?

    Chicago O'Hare Intl Airport to Sydney flights have a layover in Los Angeles most of the time.

  • What are some popular things to do or see while on a layover in Los Angeles?

    Most Los Angeles visitors opt to spend their time experiencing Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live. Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live can be accessed by traveling approximately 12.5 mi, 11.7 mi, and 10.8 mi, respectively from Los Angeles. Travelers can book a car rental at Los Angeles for about $51 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Chicago O'Hare Intl Airport to Sydney flights?

    Of the flights from Chicago O'Hare Intl Airport to Sydney that have layovers, the fewest flights stop in Dallas.

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

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

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

    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 Sydney.

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

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

    Currently, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,028). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $1,619). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
Parramatta
Manly
Coogee

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Alternative routes for O'Hare Intl to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Midway to Sydney flights
O'Hare Intl to Coolangatta flights

Top 8 airlines flying from O'Hare Intl to Sydney

Discover the top 8 airlines that operate flights from O'Hare Intl to Sydney. 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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$679Average$1,177FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$812Average$946FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$823Average$870FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$849Average$1,181FlexibilityNo cancel feeOn-time74%
DeltaCheapest$851Average$978FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$992Average$1,241FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,202Average$1,466FlexibilityNo cancel feeOn-time69%
Air New ZealandCheapest$1,275Average$1,506FlexibilityNo cancel feeOn-time78%

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