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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $775

ORD — SYD
18 Oct — 25 Oct1
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

Tue 20/1011:05 -
2 stops29h 15m
Tue 27/1010:20 -
1 stop20h 17m
Deal found 13/9$1,685
Fri 16/1011:15 -
2 stops29h 05m
Mon 26/1010:20 -
2 stops25h 32m
Deal found 14/9$1,730
Tue 1/1215:00 -
2 stops24h 35m
Sun 13/1209:55 -
2 stops31h 55m
Deal found 16/9$1,738
Sun 8/1113:00 -
2 stops26h 35m
Wed 18/1111:50 -
2 stops24h 06m
Deal found 16/9$1,744
Wed 25/1112:42 -
2 stops26h 53m
Sun 6/1207:30 -
2 stops32h 29m
Deal found 15/9$1,766
Mon 2/1115:00 -
2 stops26h 35m
Mon 16/1107:30 -
2 stops30h 07m
Deal found 14/9$1,768
Sun 18/1015:40 -
1 stop24h 40m
Sun 1/1111:20 -
1 stop20h 17m
Deal found 15/9$1,771
Sun 1/1115:00 -
2 stops24h 35m
Sun 15/1119:25 -
2 stops42h 12m
Deal found 14/9$1,774

Find flight deals from O'Hare Intl to Sydney

Round-trip from

$1,685

One-way from

$775

Popular in

December

Cheapest in

November

Average price

$2,235
Air Canada
  • Air Canada
  • 20/10-27/10
  • 3 total stops
  • 49h 32m total
  • Chicago to Sydney
Search Deals
31/10-31/12
  • 31/10-31/12
  • 2 total stops
  • 31h 10m total
  • Chicago to Sydney
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($64 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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 Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sat 31/10

07:15-06:25

2 stops31h 10m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$775

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 10/11

06:29-09:50

2 stops34h 21m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$966

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 26/10

18:55-09:50

2 stops46h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$966

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 29/9

21:10-08:00

2 stops67h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$985
Fastest return journey

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Thu 19/11

15:30-09:35

1 stop25h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,094

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Thu 31/12

20:15-19:25

2 stops54h 10m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,200

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 4/1

20:15-19:25

2 stops54h 10m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,242

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 1/1

07:00-06:25

2 stops30h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-08:00

Nonstop0h 00m

$1,288

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 5/3

06:59-09:50

2 stops33h 51m

Sydney Kingsford Smith

Tue 16/3

11:30-17:55

1 stop46h 25m

$1,817

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 6/1

11:45-19:25

2 stops38h 40m

Sydney Kingsford Smith

Thu 21/1

21:35-18:20

2 stops37h 45m

$2,093

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 19 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

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?

The best time to book flights from Chicago O'Hare Intl Airport to Sydney is 55 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 $1,720). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $2,512). 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?

Airfare is below average for this route at the moment.

Chicago O'Hare Intl Airport to Sydney flights typically cost between $1,779 and $2,404 in October.
The cheapest return price found within the last 5 days was $1,685 on Air Canada (20 Oct–27 Oct).

Reviews of airlines servicing Sydney

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
1,101 reviews
Check prices

Boarding

7.7

Comfort

7.4

Food

7.0

Entertainment

7.2

Overall

7.5

Crew

8.1

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
Qantas Airways
7.5
Good
1,101 reviews
Qantas Airways
7.5
Good
1,101 reviews
Check prices

Boarding

7.7

Comfort

7.4

Food

7.0

Entertainment

7.2

Overall

7.5

Crew

8.1

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.

Related info for your journey

  • 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 $2,200, Turkish Airlines can have you in Sydney from Chicago O'Hare Intl Airport in 26h 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 ($2,226), offers the cheapest pricing from Chicago O'Hare Intl Airport to Sydney.

  • 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 $1,720). Flying from Chicago O'Hare Intl Airport to Sydney in December is currently the most expensive (average of $2,512). 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
Manly
Katoomba
Lithgow
Cronulla
Terrigal
Randwick
Leura
Bondi Beach
Coogee

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Alternative routes for O'Hare Intl to Sydney

Midway to Sydney flights

Top airline flying from O'Hare Intl to Sydney

AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$2,226Average$2,292FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

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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.

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