Find flights
When to book
Airlines
FAQs

Cheap flights from Chicago O'Hare Intl Airport to Sydney from $716

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
16 Jul — 23 Jul1
1 adult

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 Friday 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 11 July 2025.

Round-trip from

$1,482

One-way from

$716

Popular in

December

Cheapest in

March

Average price

$2,043
20/8-27/8
  • 20/8-27/8
  • 4 total stops
  • 69h 05m total
  • Chicago to Sydney
Search Deals
23/8
  • 23/8
  • 3 total stops
  • 39h 40m total
  • Chicago to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($378 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($73 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 11 July 2025.

Wed 20/807:05ORD - SYD
2 stops37h 40mMultiple Airlines
Wed 27/813:15SYD - ORD
2 stops31h 25mMultiple Airlines
Deal found 9/7$1,482
Mon 3/1116:25ORD - SYD
1 stop25h 05mANA
Mon 17/1121:45SYD - ORD
1 stop26h 35mANA
Deal found 9/7$1,731
Sun 31/808:50ORD - SYD
1 stop31h 10mUnited Airlines
Sun 14/909:30SYD - ORD
1 stop29h 59mUnited Airlines
Deal found 10/7$1,763

Cheapflights Fare Finder

Customise 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 647,157 searches. Data last updated 11 July 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

Wed 20/8

07:05-11:45

2 stops37h 40m

Sydney Kingsford Smith

Wed 27/8

13:15-05:40

2 stops31h 25m

$1,482

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 3/11

16:25-10:30

1 stop25h 05m

Sydney Kingsford Smith

Mon 17/11

21:45-07:20

1 stop26h 35m

$1,731

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 31/8

08:50-07:00

1 stop31h 10m

Sydney Kingsford Smith

Sun 14/9

09:30-00:29

1 stop29h 59m

$1,763

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 23/8

08:00-14:40

3 stops39h 40m

$716

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 18/11

17:00-21:50

2 stops35h 50m

$987

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 18/11

16:25-20:15

1 stop34h 50m

$1,036

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 30/9

18:47-07:05

1 stop21h 18m

$1,226

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 25/8

12:15-18:40

1 stop39h 25m

$1,243

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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 return 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 return flight from O'Hare Intl to Sydney. Price data was last updated on 27 June 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 39 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 Chicago O'Hare Intl Airport to Sydney?

Currently, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $129). Flying from Chicago O'Hare Intl Airport to Sydney in October is currently the most expensive (average of $171). 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 11 July 2025.

It’s optimal to fly from Chicago O'Hare Intl Airport to Sydney in the morning. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at midday.

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 11 July 2025.
Get a feel of what it's like to fly with ANA, Fiji Airways, andAir New Zealand from Chicago O'Hare Intl Airport to Sydney by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
ANA
8.4
Very Good
900 reviews
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Fiji Airways
8.0
Very Good
201 reviews
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Air New Zealand
8.0
Very Good
494 reviews
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
Qantas Airways
7.5
Good
876 reviews
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!
United Airlines
7.4
Good
8,848 reviews
ANA
8.4
Very Good
900 reviews
Check prices

Crew

8.7

Comfort

8.2

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Reviews

1 / 20
10.0
Excellent

Kenneth,July 2025

SFO - HND

Great food, great service, great comfort. Can’t ask for more although I’m only flying economy!

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?

    For a flight from Chicago O'Hare Intl to Sydney, you will be flying into Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre vof the city. Kingsford Smith is the only Sydney airport and it handles 0 inbound flights from Chicago O'Hare Intl per day. 2 airlines have flights to Sydney Kingsford Smith from Chicago O'Hare Intl on a regular basis.

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

    According to our current data, ANA ($1,743), and United Airlines ($1,763) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney.

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

    To fly one-way, consider booking your trip with Fiji Airways, which is currently one of the cheapest options available, starting at $1,038. ANA flights start at $1,053 while deals on Air New Zealand start at $1,197 one-way.

  • 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 holiday 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $129). Flying from Chicago O'Hare Intl Airport to Sydney in October is currently the most expensive (average of $171). 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

Travelling 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
Parramatta
Wollongong
Katoomba
Manly
Penrith
Coogee
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
Leura

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 O'Hare Intl to Sydney

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

Top 2 airlines flying from O'Hare Intl to Sydney

Discover the top 2 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 647,157 searches. Data last updated 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,300Average$1,402FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,664Average$1,796FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from O'Hare Intl to Sydney?

Cheapflights helps you search for flights from O'Hare Intl to Sydney via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Sydney?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from O'Hare Intl to Sydney for you. Better yet — we are completely free to use.

Can Cheapflights find flights from O'Hare Intl to Sydney with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from O'Hare Intl to Sydney, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Sydney become cheaper?

Of course! You can now track prices for flights from O'Hare Intl to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.
Site
©2025 Cheapflights