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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $561

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
26 Feb — 5 Mar1
1 adult

The best prices from Chicago O'Hare Intl to Sydney Kingsford Smith are usually found in May or March, booked 76 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 21 February 2025.

Round-trip from

$1,287

One-way from

$561

Popular in

December

Cheapest in

May

Average price

$1,447
Qantas Airways
  • Qantas Airways
  • 8/3-18/3
  • 2 total stops
  • 62h 45m total
  • Chicago to Sydney
Search Deals
ANA
  • ANA
  • 6/4
  • 1 total stop
  • 34h 30m total
  • Chicago to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($335 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($67 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
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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 21 February 2025.

Sat 8/320:20ORD - SYD
1 stop42h 05mQantas Airways
Tue 18/311:15SYD - ORD
1 stop20h 40mQantas Airways
Deal found 20/2$1,287
Fri 18/408:25ORD - SYD
1 stop31h 10mBritish Airways
Wed 30/417:35SYD - ORD
1 stop26h 38mBritish Airways
Deal found 20/2$1,290
Tue 29/415:17ORD - SYD
1 stop24h 18mAmerican Airlines
Sun 11/517:35SYD - ORD
1 stop26h 35mAmerican Airlines
Deal found 21/2$1,293
Sat 2/819:40ORD - SYD
2 stops32h 35mMultiple Airlines
Sat 9/809:10SYD - ORD
1 stop21h 26mMultiple Airlines
Deal found 20/2$1,295
Wed 1/1015:50ORD - SYD
2 stops23h 45mDelta
Sun 26/1010:05SYD - ORD
2 stops27h 55mDelta
Deal found 19/2$1,449
Sat 29/1116:25ORD - SYD
1 stop34h 50mANA
Tue 9/1212:25SYD - ORD
1 stop42h 25mANA
Deal found 19/2$1,478
Tue 19/818:53ORD - SYD
2 stops36h 17mFiji Airways
Sat 30/813:45SYD - ORD
2 stops22h 15mFiji Airways
Deal found 21/2$1,858
Mon 2/616:40ORD - SYD
2 stops25h 05mAir New Zealand
Sun 8/618:20SYD - ORD
2 stops43h 44mAir New Zealand
Deal found 20/2$1,939

Find flights from O'Hare Intl to Sydney within your budget

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 21 February 2025.

Fly from

O'Hare Intl

Fly to

Sydney

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 8/3

20:20-07:25

1 stop42h 05m

Sydney Kingsford Smith

Tue 18/3

11:15-15:55

1 stop20h 40m

$1,287

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 8/3

18:45-06:35

1 stop42h 50m

Sydney Kingsford Smith

Sat 15/3

17:25-23:59

1 stop22h 34m

$1,292

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 29/4

10:34-06:35

2 stops29h 01m

Sydney Kingsford Smith

Sun 11/5

20:25-05:10

2 stops23h 45m

$1,293

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/8

19:40-19:15

2 stops32h 35m

Sydney Kingsford Smith

Sat 9/8

09:10-15:36

1 stop21h 26m

$1,295

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/3

12:15-07:45

2 stops27h 30m

Sydney Kingsford Smith

Tue 18/3

10:05-16:15

2 stops22h 10m

$1,469

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 19/8

18:53-22:10

2 stops36h 17m

Sydney Kingsford Smith

Sat 30/8

13:45-21:00

2 stops22h 15m

$1,858

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 18/6

16:40-08:45

2 stops25h 05m

Sydney Kingsford Smith

Wed 9/7

11:50-21:33

2 stops24h 43m

$1,888

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 1/7

09:00-07:20

2 stops31h 20m

Sydney Kingsford Smith

Mon 7/7

09:20-07:59

2 stops37h 39m

$2,032

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 6/4

17:45-19:15

1 stop34h 30m

$561

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 24/5

09:54-06:35

1 stop29h 41m

$621

Flights are sorted by cheapest return flights first.

Deals found on 20/2

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.

Travel insights for flights from O'Hare Intl to Sydney

Get recent, data-driven insights about flights from O'Hare Intl to Sydney including ideal travel times, pricing trends, and more.

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 14 February 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 76 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 21 February 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.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

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 21 February 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, ANA and Japan Airlines from Chicago to Sydney to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui
8.7
Very Good
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

ANA
8.4
Very Good
836 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Japan Airlines
8.3
Very Good
1,440 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Singapore Airlines
8.1
Very Good
1,299 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Fiji Airways
8.0
Very Good
184 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Entertainment

7.2

Boarding

8.7

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    According to our current data, Qantas Airways ($1,287), British Airways ($1,290), and American Airlines ($1,293) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that Qantas Airways is 27% cheaper than the other options available to this destination.

  • 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 ANA, which is currently one of the cheapest options available, starting at $561. American Airlines flights start at $621 while deals on Qantas Airways start at $622 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
Randwick
Manly
Penrith
Coogee
Cronulla
Terrigal
Bondi Beach
Lithgow
Leura
Swansea

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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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,338Average$1,443FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,773Average$1,917FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,886Average$2,522FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

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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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