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$419+ 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
nov. 26 — déc. 31
mer. 11/26
mer. 12/3
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 48 days in advance, depart on a Saturday or Sunday and return on a Monday

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 octobre 27, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/16:15 pmORD - SYD
2 stops23h 00mUnited Airlines
sam. 11/1511:20 amSYD - ORD
1 stop22h 05mUnited Airlines
Deal found 10/27$847
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/255:16 pmORD - SYD
1 stop22h 59mUnited Airlines
mer. 12/311:50 amSYD - ORD
1 stop22h 13mUnited Airlines
Deal found 10/27$851
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/153:55 pmORD - SYD
2 stops24h 10mUnited Airlines
lun. 11/2412:10 pmSYD - ORD
1 stop19h 40mUnited Airlines
Deal found 10/27$854
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 10/263:40 pmORD - SYD
2 stops25h 35mUnited Airlines
lun. 11/2411:20 amSYD - ORD
1 stop20h 05mUnited Airlines
Deal found 10/26$855
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/16:15 pmORD - SYD
2 stops22h 50mUnited Airlines
ven. 11/711:50 amSYD - ORD
1 stop20h 04mUnited Airlines
Deal found 10/27$857
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/226:00 pmORD - SYD
1 stop22h 05mUnited Airlines
lun. 12/2912:10 pmSYD - ORD
2 stops23h 35mUnited Airlines
Deal found 10/26$858
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/299:10 pmORD - SYD
1 stop42h 55mUnited Airlines
mer. 1/2812:10 pmSYD - ORD
1 stop19h 43mUnited Airlines
Deal found 10/27$859
This United Airlines deal was found by Cheapflights users on 10/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/84:40 pmORD - SYD
2 stops23h 35mUnited Airlines
sam. 11/1512:10 pmSYD - ORD
2 stops21h 48mUnited Airlines
Deal found 10/25$861
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/219:18 pmORD - SYD
1 stop42h 47mUnited Airlines
mer. 12/311:50 amSYD - ORD
1 stop22h 13mUnited Airlines
Deal found 10/26$862
This CheapOair deal was found by Cheapflights users on 10/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/33:40 pmORD - SYD
2 stops31h 15mAir Canada
mar. 12/2311:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 10/26$864
This Orbitz deal was found by Cheapflights users on 10/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 12/73:40 pmORD - SYD
2 stops31h 15mMultiple Airlines
sam. 12/137:15 pmSYD - ORD
2 stops36h 26mMultiple Airlines
Deal found 10/27$868
This oojo deal was found by Cheapflights users on 10/25. 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.
mar. 12/98:46 pmORD - SYD
1 stop43h 14mQantas Airways
lun. 1/1211:20 amSYD - ORD
1 stop20h 37mQantas Airways
Deal found 10/25$871

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 octobre 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$846
(Air Canada)

One-way from

$419
(Cheapflightsfares)

Popular in

October

Cheapest in

March

Average price

$1,437
Provider with most accurate pricing for Chicago O'Hare Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Sydney Kingsford Smith flights.
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From Chicago O'Hare Intl to Sydney Kingsford Smith
Search Deals
One-way flight from Chicago O'Hare Intl to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 octobre 27, 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

sam. 11/1

6:15 pm-9:15 am

2 stops23h 00m

Sydney Kingsford Smith

sam. 11/15

12:10 pm-4:58 pm

2 stops21h 48m

$847

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 11/24

3:43 pm-7:00 am

1 stop22h 17m

Sydney Kingsford Smith

jeu. 12/4

11:20 am-2:25 pm

1 stop20h 05m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dim. 11/23

6:18 pm-9:05 am

1 stop21h 47m

Sydney Kingsford Smith

ven. 12/5

2:00 pm-5:00 pm

1 stop20h 00m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dim. 12/7

2:35 pm-6:20 am

1 stop22h 45m

Sydney Kingsford Smith

sam. 12/13

11:20 am-2:25 pm

1 stop20h 05m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

sam. 11/22

6:00 pm-9:05 am

1 stop22h 05m

Sydney Kingsford Smith

mar. 12/30

11:50 am-6:45 pm

1 stop23h 55m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

sam. 11/22

3:40 pm-9:05 am

1 stop24h 25m

Sydney Kingsford Smith

mer. 12/3

11:50 am-2:41 pm

1 stop19h 51m

$854

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 12/1

3:43 pm-7:00 am

1 stop22h 17m

Sydney Kingsford Smith

mer. 12/17

12:10 pm-6:55 pm

2 stops23h 45m

$855

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

ven. 11/28

6:25 pm-9:15 am

1 stop21h 50m

Sydney Kingsford Smith

jeu. 12/4

12:10 pm-5:00 pm

1 stop21h 50m

$857

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mer. 1/21

3:10 pm-9:00 am

1 stop24h 50m

Sydney Kingsford Smith

dim. 1/25

11:20 am-2:57 pm

1 stop20h 37m

$1,039

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

jeu. 12/25

1:39 pm-9:00 am

1 stop26h 21m

Sydney Kingsford Smith

mer. 1/14

11:20 am-2:57 pm

1 stop20h 37m

$1,139

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 19 results
1
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Compare providers for flights from O'Hare Intl to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Sydney in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
GurufarePrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star
SmartFaresPrice Accuracy1 starTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago O'Hare Intl Airport-Sydney flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Sydney flights, Cheapflights users trust Gurufare the most. Gurufare has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 24, 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 48 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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $198). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $858). 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 octobre 27, 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 16% 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.

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to Sydney?

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 octobre 27, 2025.
Read reviews from past customers who have flown ANA, Qantas Airways, and United 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.
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very good
994 reviews
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Qantas Airways
7.5
Good
923 reviews
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
United Airlines
7.4
Good
8,997 reviews
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
American Airlines
7.2
Good
11,031 reviews
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Air Canada
7.1
Good
10,367 reviews
ANA
8.4
Very good
994 reviews

Crew

8.7

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

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.

  • How long is the flight from Chicago O'Hare Intl Airport to Sydney?

    There are many flights that can get you from Chicago O'Hare Intl Airport to Sydney in 23h. Fly via United Airlines to get the fastest option. There are 9228 mi between Chicago O'Hare Intl Airport and Sydney.

  • 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 $679. Additional round-trip tickets that might be worth considering are offered by Qantas Airways and American Airlines, with the lowest prices starting at $811 and $822, respectively. ANA is currently priced 37% below the average price you’ll pay for this route.

  • 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 $43 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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $198). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $858). 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
Parramatta
Wollongong
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 octobre 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$679Average$1,193FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$811Average$916FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$822Average$867FlexibilityNo cancel feeOn-time71%
DeltaCheapest$846Average$1,018FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$849Average$1,181FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$936Average$1,277FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,282Average$1,501FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$1,336Average$1,552FlexibilityNo cancel feeOn-time69%

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