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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $791

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Sydney departing on 18/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
16:45 - 07:25
ORD
-
SYD
21h 40m1 stop
Qantas Airways Logo
07:05 - 14:53
SYD
-
ORD
24h 48m2 stops
$1,408Qantas Airways
Thu, 12 Feb - Fri, 27 Feb
Qantas Airways Logo
19:12 - 06:10
ORD
-
SYD
41h 58m1 stop
Qantas Airways Logo
07:05 - 14:57
SYD
-
ORD
24h 52m2 stops
$1,412Qantas Airways
Sat, 17 Jan - Mon, 9 Feb
Qantas Airways Logo
18:40 - 14:50
ORD
-
SYD
27h 10m2 stops
Qantas Airways Logo
09:10 - 14:16
SYD
-
ORD
20h 06m1 stop
$1,421Qantas Airways
Thu, 5 Feb - Sat, 16 May
Qantas Airways Logo
09:02 - 09:00
ORD
-
SYD
30h 58m1 stop
Qantas Airways Logo
19:15 - 14:57
SYD
-
ORD
36h 42m2 stops
$1,430Qantas Airways
Tue, 27 Jan - Mon, 2 Feb
Qantas Airways Logo
13:24 - 20:50
ORD
-
SYD
38h 26m2 stops
Qantas Airways Logo
11:20 - 16:36
SYD
-
ORD
21h 16m1 stop
$1,432Qantas Airways
Sun, 1 Mar - Wed, 18 Mar
Qantas Airways Logo
18:40 - 14:50
ORD
-
SYD
27h 10m2 stops
Qantas Airways Logo
17:45 - 23:47
SYD
-
ORD
23h 02m1 stop
$1,433Qantas Airways
Thu, 5 Feb - Sun, 22 Feb
Qantas Airways Logo
18:40 - 07:35
ORD
-
SYD
43h 55m2 stops
Qantas Airways Logo
11:20 - 16:49
SYD
-
ORD
22h 29m1 stop
$1,435Qantas Airways
Fri, 16 Jan - Fri, 23 Jan
Qantas Airways Logo
18:40 - 07:35
ORD
-
SYD
43h 55m2 stops
Qantas Airways Logo
21:25 - 05:38
SYD
-
ORD
25h 13m1 stop
$1,442Qantas Airways
Thu, 5 Feb - Sun, 22 Feb
Qantas Airways Logo
11:31 - 20:50
ORD
-
SYD
40h 19m2 stops
Qantas Airways Logo
21:25 - 05:38
SYD
-
ORD
25h 13m1 stop
$1,444Qantas Airways
Thu, 12 Feb - Sun, 22 Feb
Qantas Airways Logo
19:40 - 06:10
ORD
-
SYD
41h 30m1 stop
Qantas Airways Logo
19:15 - 14:57
SYD
-
ORD
36h 42m2 stops
$1,445Qantas Airways
Sat, 24 Jan - Sat, 31 Jan

Qantas Airways flights from Chicago O'Hare Intl Airport to Sydney

Our best Qantas Airways deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Qantas Airways
12 Feb
ORD16:45Chicago O'Hare Intl
21h 40m
1 stop
SYD07:25Sydney Kingsford Smith
27 Feb
SYD07:05Sydney Kingsford Smith
24h 48m
2 stops
ORD14:53Chicago O'Hare Intl
$1,408
Find similar
Qantas Airways
17 Jan
ORD19:12Chicago O'Hare Intl
41h 58m
1 stop
SYD06:10Sydney Kingsford Smith
9 Feb
SYD07:05Sydney Kingsford Smith
24h 52m
2 stops
ORD14:57Chicago O'Hare Intl
$1,412
Find similar
Qantas Airways
5 Feb
ORD18:40Chicago O'Hare Intl
27h 10m
2 stops
SYD14:50Sydney Kingsford Smith
16 May
SYD09:10Sydney Kingsford Smith
20h 06m
1 stop
ORD14:16Chicago O'Hare Intl
$1,421
Find similar

Turkish Airlines flights from Chicago O'Hare Intl Airport to Sydney

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Turkish Airlines
13 Jan
ORD11:50Chicago O'Hare Intl
38h 30m
2 stops
SYD19:20Sydney Kingsford Smith
30 Jan
SYD21:15Sydney Kingsford Smith
38h 10m
2 stops
ORD18:25Chicago O'Hare Intl
$2,289
Find similar
Turkish Airlines
12 Jan
ORD11:50Chicago O'Hare Intl
38h 30m
2 stops
SYD19:20Sydney Kingsford Smith
26 Jan
SYD21:15Sydney Kingsford Smith
38h 10m
2 stops
ORD18:25Chicago O'Hare Intl
$2,343
Find similar
Turkish Airlines
13 Jan
ORD11:50Chicago O'Hare Intl
38h 30m
2 stops
SYD19:20Sydney Kingsford Smith
1 Feb
SYD21:15Sydney Kingsford Smith
38h 10m
2 stops
ORD18:25Chicago O'Hare Intl
$2,371
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago O'Hare Intl Airport 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, momondo users made 78,305 searches. Data last updated 4 January 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

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 12/2

16:45-07:25

1 stop21h 40m

Sydney Kingsford Smith

Fri 27/2

07:05-14:53

2 stops24h 48m

$1,408

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 17/1

19:12-06:10

1 stop41h 58m

Sydney Kingsford Smith

Mon 9/2

07:05-14:57

2 stops24h 52m

$1,412

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/2

18:40-14:50

2 stops27h 10m

Sydney Kingsford Smith

Sat 16/5

09:10-14:16

1 stop20h 06m

$1,421

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 27/1

09:02-09:00

1 stop30h 58m

Sydney Kingsford Smith

Mon 2/2

19:15-14:57

2 stops36h 42m

$1,430

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/3

13:24-20:50

2 stops38h 26m

Sydney Kingsford Smith

Wed 18/3

11:20-16:36

1 stop21h 16m

$1,432

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/2

18:40-14:50

2 stops27h 10m

Sydney Kingsford Smith

Sun 22/2

17:45-23:47

1 stop23h 02m

$1,433

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 16/1

18:40-07:35

2 stops43h 55m

Sydney Kingsford Smith

Fri 23/1

11:20-16:49

1 stop22h 29m

$1,435

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/2

18:40-07:35

2 stops43h 55m

Sydney Kingsford Smith

Sun 22/2

21:25-05:38

1 stop25h 13m

$1,442

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 12/2

11:31-20:50

2 stops40h 19m

Sydney Kingsford Smith

Sun 22/2

21:25-05:38

1 stop25h 13m

$1,444

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 24/1

19:40-06:10

1 stop41h 30m

Sydney Kingsford Smith

Sat 31/1

19:15-14:57

2 stops36h 42m

$1,445

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of May is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,269. If you aren’t able to travel to Sydney during the month of May, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,271.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,600 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Chicago O'Hare Intl Airport for as low as $1,271 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Sydney flights?

You could potentially save up to 37% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Sydney flight.

How have Chicago O'Hare Intl Airport to Sydney flight prices changed over time?

As of January 2026, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 58% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Chicago O'Hare Intl Airport to Sydney (ORD to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Sydney

Fastest flight time

24h 25m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 24h 25m
There are no direct flights from Chicago O'Hare Intl Airport to Sydney. There are no popular flight routes from Chicago O'Hare Intl Airport to Sydney.
Search flight deals

  • How far is Chicago O'Hare Intl to Sydney Kingsford Smith by plane?

    A flight from Chicago O'Hare Intl to Sydney Kingsford Smith will travel around 14845.8 km. In terms of flight time, this usually takes a little over 24h 25m.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Chicago O'Hare Intl Airport to Sydney?

Best airlines flying from Chicago O'Hare Intl Airport to Sydney

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Sydney with momondo
Airline
Rating
Free cancellation
Price
Qantas AirwaysPriceFrom $1,305Free cancellationRating
7.5
962 reviews
Search Qantas Airways flights

Travelling to a place near Sydney?

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

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Sydney?

Finding the right flight to Sydney from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

Can I find flights from Chicago to Sydney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Chicago to Sydney flights to just show those with flexible booking policies.

How can momondo help me find flights from Chicago to Sydney?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Chicago.

I’m not ready to book a flight from Chicago to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Chicago and alert you when they change.

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