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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $719

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from O'Hare Intl to Sydney

Enter your travel dates to find the best prices.

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 April 2026.

Sat 16/506:55
ORD
-
SYD
3 stops37h 55m
Multiple Airlines
Mon 8/613:15
SYD
-
ORD
2 stops31h 49m
Multiple Airlines
Deal found 18/4$1,686
Wed 4/1116:25
ORD
-
SYD
1 stop34h 50m
ANA
Tue 17/1121:45
SYD
-
ORD
1 stop26h 35m
ANA
Deal found 17/4$1,719
Tue 8/917:45
ORD
-
SYD
1 stop34h 25m
ANA
Tue 13/1012:45
SYD
-
ORD
2 stops32h 20m
ANA
Deal found 17/4$1,723
Wed 26/817:45
ORD
-
SYD
1 stop24h 40m
ANA
Tue 8/911:45
SYD
-
ORD
2 stops32h 00m
ANA
Deal found 16/4$1,731
Wed 5/817:45
ORD
-
SYD
1 stop34h 25m
ANA
Sun 30/820:55
SYD
-
ORD
2 stops35h 05m
ANA
Deal found 17/4$1,732
Tue 17/1110:30
ORD
-
SYD
1 stop40h 45m
ANA
Tue 24/1112:25
SYD
-
ORD
1 stop35h 55m
ANA
Deal found 18/4$1,746
Tue 5/507:15
ORD
-
SYD
2 stops32h 50m
Multiple Airlines
Tue 12/509:10
SYD
-
ORD
2 stops37h 45m
Multiple Airlines
Deal found 16/4$1,748

Find 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 April 2026.

Round-trip from

$1,686

One-way from

$719

Popular in

December

Cheapest in

November

Average price

$2,012
16/5-8/6
  • 16/5-8/6
  • 5 total stops
  • 69h 44m total
  • Chicago to Sydney
Search Deals
30/5
  • 30/5
  • 2 total stops
  • 35h 33m total
  • Chicago to Sydney
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($51 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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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 21 April 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 31/8

15:50-06:50

2 stops24h 00m

Sydney Kingsford Smith

Tue 15/9

09:15-20:30

2 stops26h 15m

$1,985
Fastest return journey

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 5/5

18:20-06:55

1 stop21h 35m

Sydney Kingsford Smith

Tue 19/5

10:20-17:05

2 stops21h 45m

$1,985

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 1/9

15:50-06:50

2 stops24h 00m

Sydney Kingsford Smith

Tue 22/9

09:15-21:34

2 stops27h 19m

$1,985

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 1/6

11:09-06:50

2 stops28h 41m

Sydney Kingsford Smith

Mon 15/6

09:15-17:02

2 stops22h 47m

$1,985

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 29/7

11:20-06:50

2 stops28h 30m

Sydney Kingsford Smith

Tue 11/8

09:15-14:00

1 stop19h 45m

$1,987

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 5/5

06:25-06:50

2 stops33h 25m

Sydney Kingsford Smith

Tue 26/5

09:15-16:51

2 stops22h 36m

$1,987

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 5/5

14:09-06:50

2 stops25h 41m

Sydney Kingsford Smith

Tue 12/5

09:15-18:50

2 stops24h 35m

$1,987

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 6/7

09:48-06:50

2 stops30h 02m

Sydney Kingsford Smith

Mon 27/7

09:15-21:48

2 stops27h 33m

$1,987
Cheapest one-way

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 5/5

20:56-11:50

2 stops47h 54m

$794

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/8

17:29-11:50

3 stops51h 21m

$811

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 17 resultsSorted by cheapest first
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 17 April 2026.

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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,660). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $2,317). 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 for a return flight from Chicago O'Hare Intl Airport to Sydney?

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 April 2026.
Get a feel of what it's like to fly with Qantas Airways 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
1,023 reviews
Check prices

Comfort

7.5

Overall

7.5

Food

7.0

Boarding

7.7

Entertainment

7.2

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.
Qantas Airways
7.5
Good
1,023 reviews
Qantas Airways
7.5
Good
1,023 reviews
Check prices

Comfort

7.5

Overall

7.5

Food

7.0

Boarding

7.7

Entertainment

7.2

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

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. 1 airline has 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 $1,985, Delta can have you in Sydney from Chicago O'Hare Intl Airport in 21h 35m. The distance between Chicago O'Hare Intl Airport and Sydney is about 14851 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Chicago O'Hare Intl Airport to Sydney round-trip?

    According to our current data, Qantas Airways ($1,889), offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney. Users have found that Qantas Airways is 2% 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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sydney (average of $1,660). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $2,317). 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
Penrith
Katoomba
Terrigal
Lithgow
Cronulla
Manly
Bondi Beach
Leura
Randwick
Coogee

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 airline flying from O'Hare Intl to Sydney

Discover the top airline 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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,889Average$2,271FlexibilityNo 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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