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$568+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
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 May or March, booked 48 days in advance, depart on a Saturday or Sunday and return on a Monday

Cheap 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 diciembre 12, 2025.

This oojo deal was found by Cheapflights users on 12/10. 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.
lun. 12/224:34 pmORD - SYD
1 stop23h 26mQantas Airways
mié. 1/147:15 pmSYD - ORD
2 stops38h 34mQantas Airways
Deal found 12/10$975
This oojo deal was found by Cheapflights users on 12/11. 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.
lun. 12/294:46 pmORD - SYD
2 stops35h 04mQantas Airways
vie. 1/911:20 amSYD - ORD
1 stop20h 37mQantas Airways
Deal found 12/11$1,275
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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.
jue. 12/116:17 pmORD - SYD
2 stops27h 33mQantas Airways
jue. 12/187:15 pmSYD - ORD
2 stops35h 21mQantas Airways
Deal found 12/10$1,358
This oojo deal was found by Cheapflights users on 12/10. 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.
mié. 12/314:46 pmORD - SYD
2 stops47h 24mQantas Airways
mié. 1/75:50 pmSYD - ORD
2 stops38h 07mQantas Airways
Deal found 12/10$1,395
This oojo deal was found by Cheapflights users on 12/9. 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.
mié. 12/106:17 pmORD - SYD
2 stops27h 08mQantas Airways
mié. 12/177:05 amSYD - ORD
2 stops25h 57mQantas Airways
Deal found 12/9$1,401
This CheapOair deal was found by Cheapflights users on 12/11. 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.
mié. 12/312:50 pmORD - SYD
2 stops30h 35mQantas Airways
sáb. 1/107:05 amSYD - ORD
2 stops24h 52mQantas Airways
Deal found 12/11$1,544
This Air Canada deal was found by Cheapflights users on 12/10. 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.
jue. 12/111:10 pmORD - SYD
1 stop27h 25mAir Canada
jue. 12/1811:20 amSYD - ORD
1 stop20h 21mAir Canada
Deal found 12/10$1,619
This Trip.com deal was found by Cheapflights users on 12/11. 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.
jue. 12/256:02 pmORD - SYD
2 stops27h 48mMultiple Airlines
mar. 1/1311:20 amSYD - ORD
2 stops41h 48mMultiple Airlines
Deal found 12/11$1,640
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/108:00 amORD - SYD
2 stops30h 25mMultiple Airlines
mié. 12/175:45 pmSYD - ORD
1 stop39h 04mMultiple Airlines
Deal found 12/9$1,667

Find 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 diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$901
(CrystalTravel)

One-way from

$568
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,582
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
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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. 13% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in December 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 diciembre 12, 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

mié. 2/11

3:10 pm-9:00 am

1 stop24h 50m

Sydney Kingsford Smith

mié. 3/4

11:20 am-2:04 pm

1 stop19h 44m

$1,149

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 2/22

4:20 pm-9:15 am

1 stop23h 55m

Sydney Kingsford Smith

dom. 3/1

12:10 pm-2:45 pm

1 stop19h 35m

$1,163

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 4/1

4:40 pm-7:55 am

1 stop23h 15m

Sydney Kingsford Smith

lun. 4/13

9:30 am-11:28 pm

1 stop28h 58m

$1,163

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 3/16

6:25 pm-9:05 am

1 stop22h 40m

Sydney Kingsford Smith

lun. 3/30

11:20 am-1:00 am

1 stop29h 40m

$1,163

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 1/13

2:40 pm-6:20 am

1 stop22h 40m

Sydney Kingsford Smith

lun. 1/26

11:20 am-6:46 pm

2 stops24h 26m

$1,167

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 3/17

4:05 pm-9:05 am

2 stops25h 00m

Sydney Kingsford Smith

lun. 3/30

11:20 am-1:00 am

1 stop29h 40m

$1,167

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 3/15

8:45 am-6:20 am

2 stops29h 35m

Sydney Kingsford Smith

lun. 3/30

11:20 am-1:00 am

1 stop29h 40m

$1,167

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 2/22

3:59 pm-8:30 am

2 stops23h 31m

Sydney Kingsford Smith

dom. 3/1

10:40 am-6:49 pm

2 stops25h 09m

$1,168

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 3/18

7:35 pm-9:05 am

1 stop21h 30m

Sydney Kingsford Smith

dom. 3/29

11:20 am-7:12 am

1 stop35h 52m

$1,173

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

jue. 2/19

11:16 am-9:00 am

1 stop28h 44m

Sydney Kingsford Smith

sáb. 2/28

5:45 pm-9:33 pm

1 stop20h 48m

$1,198

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 21 results
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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 December.
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 December 5, 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 $851). 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 diciembre 12, 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.

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 diciembre 12, 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
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
ANA
8.4
Very good
1,021 reviews
ANA
8.4
Very good
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
Qantas Airways
7.5
Good
947 reviews
ANA
8.4
Very good
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
United Airlines
7.4
Good
9,095 reviews
ANA
8.4
Very good
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
American Airlines
7.2
Good
11,049 reviews
ANA
8.4
Very good
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
Air Canada
7.1
Good
10,514 reviews
ANA
8.4
Very good
1,021 reviews

Food

7.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support

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 55m. Fly via Qantas Airways or United Airlines to get the fastest option. There are 9228 mi between Chicago O'Hare Intl Airport and Sydney. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $800 and $814, respectively. ANA is currently priced 36% below the average price you’ll pay for this route.

  • 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 $304 on ANA. Other airlines that offer cheap prices include Qantas Airways from $396 and American Airlines from $409 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 $38 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 $851). 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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$679Average$1,209FlexibilityNo cancel feeOn-time80%
Qantas AirwaysCheapest$810Average$896FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$815Average$855FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$849Average$1,181FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$870Average$1,536FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$891Average$1,209FlexibilityNo cancel feeOn-time67%
DeltaCheapest$935Average$1,034FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$1,282Average$1,501FlexibilityNo cancel feeOn-time78%

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