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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $668

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
22 Jan — 29 Jan1
1 adult

The best prices from Chicago O'Hare Intl to Sydney Kingsford Smith are usually found in May or March, booked 89 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 17 January 2025.

Round-trip from

$1,365

One-way from

$668

Popular in

December

Cheapest in

May

Average price

$1,864
Qantas Airways
  • Qantas Airways
  • 30/1-5/2
  • 2 total stops
  • 45h 55m total
  • Chicago to Sydney
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American Airlines
  • American Airlines
  • 4/6
  • 1 total stop
  • 27h 45m total
  • Chicago to Sydney
Search Deals
High demand for flights, 6% potential price rise
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Best time to find cheap flights, 1% potential price drop
Search Deals
Average for round-trip flights in January 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 17 January 2025.

Sat 25/115:20ORD - SYD
1 stop23h 05mQantas Airways
Thu 8/509:10SYD - ORD
1 stop29h 18mQantas Airways
Deal found 16/1$1,365
Sun 2/314:13ORD - SYD
1 stop24h 12mBritish Airways
Sun 9/317:25SYD - ORD
1 stop22h 34mBritish Airways
Deal found 15/1$1,374
Sun 2/211:47ORD - SYD
2 stops25h 23mAmerican Airlines
Thu 13/211:50SYD - ORD
1 stop22h 20mAmerican Airlines
Deal found 16/1$1,376
Thu 13/211:35ORD - SYD
2 stops32h 25mMultiple Airlines
Thu 27/214:00SYD - ORD
2 stops32h 28mMultiple Airlines
Deal found 15/1$1,439
Tue 12/821:05ORD - SYD
2 stops31h 10mANA
Tue 26/811:50SYD - ORD
2 stops32h 13mANA
Deal found 16/1$1,540

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 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 30/1

14:14-07:25

1 stop24h 11m

Sydney Kingsford Smith

Wed 5/2

11:15-15:59

1 stop21h 44m

$1,365

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 23/5

13:45-06:55

1 stop26h 10m

Sydney Kingsford Smith

Mon 2/6

10:25-16:15

2 stops20h 50m

$1,369

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 2/3

14:13-07:25

1 stop24h 12m

Sydney Kingsford Smith

Sun 9/3

17:25-22:59

1 stop22h 34m

$1,374

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 13/2

11:35-13:00

2 stops32h 25m

Sydney Kingsford Smith

Thu 27/2

14:00-05:28

2 stops32h 28m

$1,439

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 21/5

19:46-19:15

2 stops32h 29m

Sydney Kingsford Smith

Mon 2/6

11:50-04:51

2 stops32h 01m

$1,556

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 17/5

18:45-11:45

2 stops26h 00m

Sydney Kingsford Smith

Tue 3/6

13:15-20:45

2 stops22h 30m

$1,857

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 4/6

11:50-06:35

1 stop27h 45m

$668

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 9/3

19:17-09:00

1 stop21h 43m

$669

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 14/2

11:35-16:55

3 stops36h 20m

$851

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 1/4

18:45-12:45

2 stops26h 00m

$912

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 17 results
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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 10 January 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 89 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 17 January 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 17 January 2025.
Peruse reviews from past customers who have flown with Qantas Airways and ANA 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
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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
8.8
Very Good
62 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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
847 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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
1,327 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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
8.1
Very Good
187 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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.

Alaska Airlines
8.0
Very Good
9,684 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Comfort

8.1

Boarding

8.7

Food

7.8

Reviews

1 / 2

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 ($1,365), American Airlines ($1,369), and British Airways ($1,374) offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that Qantas Airways is 28% 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 American Airlines, which is currently one of the cheapest options available, starting at $668. Qantas Airways flights start at $669 while deals on Fiji Airways start at $912 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
Bondi Beach
Lithgow
Terrigal
Leura
Swansea

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 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,467Average$1,564FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,554Average$1,900FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,815Average$2,321FlexibilityNo 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?

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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