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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $846

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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
13 Nov — 20 Nov1
1 adult
1 adult, Economy

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 Friday or Sunday and return on a Monday

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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 14 October 2025.

Tue 11/1113:49ORD - SYD
1 stop26h 11mQantas Airways
Tue 25/1106:20SYD - ORD
2 stops24h 18mQantas Airways
Deal found 14/10$1,818
Mon 10/1106:30ORD - SYD
2 stops37h 00mMultiple Airlines
Mon 17/1114:00SYD - ORD
2 stops26h 00mMultiple Airlines
Deal found 13/10$1,830
Sun 9/1107:00ORD - SYD
2 stops43h 45mAlaska Airlines
Sun 16/1121:40SYD - ORD
2 stops41h 00mAlaska Airlines
Deal found 12/10$1,917
Wed 12/1110:00ORD - SYD
2 stops40h 45mAlaska Airlines
Tue 18/1121:40SYD - ORD
2 stops41h 00mAlaska Airlines
Deal found 12/10$1,929
Sun 9/1107:00ORD - SYD
2 stops43h 45mAlaska Airlines
Sat 22/1121:40SYD - ORD
2 stops25h 48mAlaska Airlines
Deal found 12/10$1,930
Wed 12/1110:00ORD - SYD
2 stops40h 45mAlaska Airlines
Sat 22/1121:40SYD - ORD
2 stops25h 48mAlaska Airlines
Deal found 12/10$1,943
Fri 14/1113:49ORD - SYD
1 stop26h 11mQantas Airways
Sun 23/1106:20SYD - ORD
2 stops24h 18mQantas Airways
Deal found 12/10$1,952
Fri 14/1117:53ORD - SYD
2 stops32h 52mAlaska Airlines
Sat 22/1121:40SYD - ORD
2 stops36h 26mAlaska Airlines
Deal found 12/10$1,964
Wed 12/1110:00ORD - SYD
2 stops40h 45mAlaska Airlines
Fri 21/1121:40SYD - ORD
2 stops49h 48mAlaska Airlines
Deal found 12/10$1,966
Sun 9/1107:00ORD - SYD
2 stops43h 45mAlaska Airlines
Fri 21/1121:40SYD - ORD
2 stops43h 19mAlaska Airlines
Deal found 12/10$1,967
Tue 21/1019:01ORD - SYD
1 stop21h 04mQantas Airways
Tue 2/1206:20SYD - ORD
2 stops26h 08mQantas Airways
Deal found 14/10$1,975

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 14 October 2025.

Round-trip from

$1,812

One-way from

$846

Popular in

December

Cheapest in

March

Average price

$2,225
Fiji Airways
  • Fiji Airways
  • 14/2-7/3
  • 4 total stops
  • 48h 53m total
  • Chicago to Sydney
Search Deals
19/2
  • 19/2
  • 2 total stops
  • 57h 05m total
  • Chicago to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($367 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($82 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 14 October 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 9/11

07:00-19:45

2 stops43h 45m

Sydney Kingsford Smith

Sun 16/11

21:40-21:40

2 stops41h 00m

$1,917

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 9/11

07:00-19:45

2 stops43h 45m

Sydney Kingsford Smith

Tue 18/11

21:40-21:40

2 stops41h 00m

$1,917

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/11

08:00-19:45

2 stops42h 45m

Sydney Kingsford Smith

Tue 18/11

21:40-16:30

2 stops35h 50m

$1,975

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/11

17:10-12:30

2 stops26h 20m

Sydney Kingsford Smith

Tue 11/11

14:10-21:21

2 stops24h 11m

$1,998

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/11

08:00-19:45

2 stops42h 45m

Sydney Kingsford Smith

Sun 16/11

21:40-14:25

2 stops33h 45m

$2,011

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/11

08:00-19:45

2 stops42h 45m

Sydney Kingsford Smith

Thu 20/11

21:40-12:03

2 stops31h 23m

$2,011

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 6/12

17:18-12:30

2 stops26h 12m

Sydney Kingsford Smith

Sat 13/12

14:30-21:24

2 stops23h 54m

$2,182

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 29/10

19:01-09:50

2 stops46h 49m

Sydney Kingsford Smith

Wed 12/11

11:35-05:41

2 stops35h 06m

$2,225

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 7/12

18:17-09:00

1 stop21h 43m

Sydney Kingsford Smith

Tue 23/12

11:20-16:16

1 stop21h 56m

$2,231

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 31/12

16:20-06:20

1 stop21h 00m

Sydney Kingsford Smith

Mon 2/2

11:20-17:02

1 stop22h 42m

$2,256

Flights are sorted by cheapest return flights first.

Deals found on 12/10

Showing 1-10 of 20 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 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 10 October 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 48 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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $306). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $1,324). 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 14 October 2025.

It’s optimal to fly from Chicago O'Hare Intl Airport to Sydney in the afternoon. By choosing this option you can save up to 49% 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 14 October 2025.
Get a feel of what it's like to fly with Qantas Airways, American Airlines, andAir Canada 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.
Qantas Airways
7.5
Good
916 reviews
Check prices

Overall

7.5

Entertainment

7.2

Crew

8.2

Comfort

7.5

Food

7.0

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Amanda,Oct 2025

SYD - TMW

1 hour flight, on time, pleasant flight, easy boarding, nice staff.
Qantas Airways
7.5
Good
916 reviews
Qantas Airways
7.5
Good
916 reviews
Check prices

Overall

7.5

Entertainment

7.2

Crew

8.2

Comfort

7.5

Food

7.0

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Amanda,Oct 2025

SYD - TMW

1 hour flight, on time, pleasant flight, easy boarding, nice staff.
American Airlines
7.2
Good
11,043 reviews
Qantas Airways
7.5
Good
916 reviews
Check prices

Overall

7.5

Entertainment

7.2

Crew

8.2

Comfort

7.5

Food

7.0

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Amanda,Oct 2025

SYD - TMW

1 hour flight, on time, pleasant flight, easy boarding, nice staff.
Air Canada
7.1
Good
10,298 reviews
Qantas Airways
7.5
Good
916 reviews
Check prices

Overall

7.5

Entertainment

7.2

Crew

8.2

Comfort

7.5

Food

7.0

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Amanda,Oct 2025

SYD - TMW

1 hour flight, on time, pleasant flight, easy boarding, nice staff.

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. 3 airlines have flights to Sydney Kingsford Smith from Chicago O'Hare Intl on a regular basis.

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

    For as low as $1,917, Alaska Airlines can have you in Sydney from Chicago O'Hare Intl Airport in 43h 45m. The distance between Chicago O'Hare Intl Airport and Sydney is about 14851 km.

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

    According to our current data, Air Canada ($1,283), American Airlines ($1,322), and Qantas Airways ($1,349) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that Air Canada is 23% cheaper than the other options available to this destination.

  • 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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $306). Flying from Chicago O'Hare Intl Airport to Sydney in January is currently the most expensive (average of $1,324). 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 Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Penrith
Manly
Terrigal
Randwick
Bondi Beach
Coogee
Cronulla
Leura
Lithgow

Browse thousands of different options on Cheapflights for your next trip

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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

Top 3 airlines flying from O'Hare Intl to Sydney

Discover the top 3 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 14 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,283Average$1,787FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,322Average$1,336FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,349Average$1,450FlexibilityNo cancel feeOn-time74%
Search Qantas Airways 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.

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