HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$645+ Cheap flights from Sydney (SYD) to O'Hare Intl (ORD)

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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sydney to O'Hare Intl 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.

Cheapflights Tip: The best prices from Sydney Kingsford Smith to Chicago O'Hare Intl are usually found in February or March, booked 78 days in advance, depart on a Monday or Tuesday and return on a Saturday

Cheap flight deals from Sydney to O'Hare Intl

Cheapest flights from Sydney to O'Hare Intl
Explore the most affordable flight options available from Sydney to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:10 pmSYD - ORD
1 stop28h 04mUnited Airlines
Wed 1/146:30 pmORD - SYD
1 stop21h 35mUnited Airlines
Deal found 12/10$1,148
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:00 pmSYD - ORD
1 stop24h 32mUnited Airlines
Mon 2/96:29 pmORD - SYD
1 stop21h 46mUnited Airlines
Deal found 12/11$1,150
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1512:10 pmSYD - ORD
1 stop24h 34mUnited Airlines
Fri 1/92:40 pmORD - SYD
1 stop22h 40mUnited Airlines
Deal found 12/10$1,198
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1711:20 amSYD - ORD
1 stop20h 05mUnited Airlines
Thu 1/224:10 pmORD - SYD
1 stop23h 55mUnited Airlines
Deal found 12/10$1,199
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:10 pmSYD - ORD
2 stops21h 49mUnited Airlines
Thu 1/222:36 pmORD - SYD
2 stops25h 29mUnited Airlines
Deal found 12/11$1,200
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:10 pmSYD - ORD
1 stop28h 00mUnited Airlines
Fri 1/22:40 pmORD - SYD
1 stop22h 40mUnited Airlines
Deal found 12/10$1,248
This Virgin Australia 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 Virgin Australia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:20 amSYD - ORD
1 stop20h 12mVirgin Australia
Mon 2/21:00 pmORD - SYD
1 stop27h 05mVirgin Australia
Deal found 12/11$1,349
This Virgin Australia 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 Virgin Australia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:10 pmSYD - ORD
1 stop24h 55mVirgin Australia
Thu 1/224:10 pmORD - SYD
1 stop23h 55mVirgin Australia
Deal found 12/11$1,399
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:50 amSYD - ORD
1 stop22h 15mUnited Airlines
Thu 1/152:40 pmORD - SYD
1 stop25h 25mUnited Airlines
Deal found 12/11$1,463
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:20 amSYD - ORD
1 stop35h 45mAmerican Airlines
Tue 1/63:23 pmORD - SYD
2 stops30h 02mAmerican Airlines
Deal found 12/10$1,578

Find flight deals from Sydney to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to O'Hare Intl (ORD). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,014
(Air Canada)

One-way from

$645
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,432
Provider with most accurate pricing for Sydney Kingsford Smith-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Chicago O'Hare Intl flights.
Search Deals
From Sydney Kingsford Smith to Chicago O'Hare Intl
Search Deals
One-way flight from Sydney Kingsford Smith to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($229 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sydney to O'Hare Intl 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 December 12, 2025.
Use the filters below to find and compare flights from Sydney to Chicago O'Hare Intl Airport that are best for you.

Fly from

Sydney

Fly to

O'Hare Intl

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 12/30

12:10 pm-11:14 pm

1 stop28h 04m

Chicago O'Hare Intl

Wed 1/14

6:30 pm-9:05 am

1 stop21h 35m

$1,148

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 2/4

10:40 am-4:57 pm

2 stops23h 17m

Chicago O'Hare Intl

Sun 5/3

7:59 pm-6:35 am

2 stops43h 36m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 2/4

12:10 pm-5:04 pm

2 stops21h 54m

Chicago O'Hare Intl

Sun 5/3

4:40 pm-6:55 am

1 stop23h 15m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 2/3

2:00 pm-6:48 pm

1 stop21h 48m

Chicago O'Hare Intl

Sat 5/2

9:20 pm-6:55 am

1 stop42h 35m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 12/23

2:00 pm-9:32 pm

1 stop24h 32m

Chicago O'Hare Intl

Mon 2/9

6:29 pm-9:15 am

1 stop21h 46m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 3/23

10:20 am-5:00 pm

2 stops22h 40m

Chicago O'Hare Intl

Sun 4/5

9:10 pm-7:00 am

1 stop42h 50m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 2/5

11:20 am-2:50 pm

1 stop20h 30m

Chicago O'Hare Intl

Sat 5/2

9:20 pm-6:55 am

1 stop42h 35m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/2

11:50 am-2:40 pm

1 stop19h 50m

Chicago O'Hare Intl

Sat 5/2

9:20 pm-6:55 am

1 stop42h 35m

$1,150

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 3/23

5:00 pm-5:00 am

3 stops52h 00m

$645

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/7

11:55 am-12:45 am

2 stops27h 50m

$654

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 17 results
1
2

Compare providers for flights from Sydney to O'Hare Intl

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 Sydney to O'Hare Intl in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Sydney-Chicago O'Hare Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Sydney-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Sydney-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-Chicago O'Hare Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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 Sydney-Chicago O'Hare Intl Airport 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 Sydney to O'Hare Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Sydney to O'Hare Intl. Price data was last updated on December 5, 2025.

The best time to book flights from Sydney to Chicago O'Hare Intl Airport is 78 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Sydney to Chicago O'Hare Intl Airport (average of $620). Flying from Sydney to Chicago O'Hare Intl Airport in December is currently the most expensive (average of $1,026). 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 much does it cost to fly round-trip from Sydney to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated December 12, 2025.
See what other customers who have flown with Qantas Airways and American Airlines from Sydney to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
947 reviews

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Qantas Airways
7.5
Good
947 reviews
Qantas Airways
7.5
Good
947 reviews

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
American Airlines
7.2
Good
11,050 reviews
Qantas Airways
7.5
Good
947 reviews

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

Related info for your journey

Find useful and relevant information for your journey from Sydney to O'Hare Intl. 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 from for flights from Sydney to Chicago O'Hare Intl?

    If you book a flight to Chicago O'Hare Intl from Sydney, you will be flying from 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 Kingsford Smith to Chicago O'Hare Intl per day from 2 different airlines.

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

    Departing from Sydney to Chicago O'Hare Intl Airport will take you 28h 04m. The distance from Sydney to Chicago O'Hare Intl Airport is about 9228 mi.

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

    According to our current data, Qantas Airways ($631), and American Airlines ($875) offers the cheapest pricing from Sydney to Chicago O'Hare Intl Airport. These flights start at 34% lower than the current average price 3 months from now.

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

    $408 is the cheapest one-way deal found within the past few days, from Qantas Airways. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from $469 and $530, respectively.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Sydney to Chicago O'Hare Intl Airport (average of $620). Flying from Sydney to Chicago O'Hare Intl Airport in December is currently the most expensive (average of $1,026). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Gurnee
Elgin
Naperville
Hoffman Estates
Beloit
Delavan
Oak Brook
Downers Grove
Des Plaines
Elk Grove Village
Skokie
Lake Geneva
Bridgeview
Warrenville
Waukegan
Aurora
Kenosha
Evanston

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.

Alternative routes for Sydney to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Midway flights

Top 2 airlines flying from Sydney to O'Hare Intl

Discover the top 2 airlines that operate flights from Sydney to O'Hare Intl. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$631Average$759FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$875Average$1,143FlexibilityNo cancel feeOn-time71%

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.