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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $571

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air New Zealand Logo
2:33 pm - 10:35 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
27h 02m2 stops San Francisco Auckland Intl
Air New Zealand Logo
7:25 pm - 7:56 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
41h 31m2 stops Auckland Intl Houston George Bush Intcntl
$1,313Air New Zealand
Mon, Feb 8 - Mon, Feb 22
Air New Zealand Logo
6:15 pm - 9:50 pmORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
58h 35m2 stops Los Angeles Auckland Intl
Air New Zealand Logo
9:55 am - 8:40 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
27h 45m2 stops Auckland Intl Los Angeles
$1,326Air New Zealand
Tue, Dec 1 - Wed, Jan 13
Multiple Airlines Logo
7:30 am - 6:25 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
29h 55m2 stops Las Vegas Harry Reid Intl Los Angeles
Multiple Airlines Logo
9:20 am - 10:57 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
30h 37m1 stop Houston George Bush Intcntl
$1,335Multiple Airlines
Fri, Feb 5 - Thu, Feb 18
Multiple Airlines Logo
6:00 am - 8:35 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
33h 35m3 stops Atlanta Hartsfield-Jackson Los Angeles Auckland Intl
Multiple Airlines Logo
11:50 am - 12:26 amSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
29h 36m3 stops Auckland Intl Los Angeles Denver Intl
$1,337Multiple Airlines
Sun, Feb 14 - Fri, Feb 19
Qatar Airways Logo
7:20 pm - 5:05 pmORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
30h 45m1 stop Doha Hamad Intl
Qatar Airways Logo
7:00 pm - 3:05 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
35h 05m2 stops Brisbane Doha Hamad Intl
$1,408Qatar Airways
Tue, Apr 27 - Wed, May 5
Qatar Airways Logo
6:50 pm - 10:20 pmORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
34h 30m2 stops Doha Hamad Intl Adelaide
Qatar Airways Logo
10:10 pm - 2:30 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
33h 20m1 stop Doha Hamad Intl
$1,408Qatar Airways
Mon, Jan 25 - Wed, Feb 10
American Airlines Logo
3:29 pm - 9:00 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
24h 31m1 stop Los Angeles
American Airlines Logo
2:05 pm - 10:05 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
25h 00m1 stop Dallas/Fort Worth
$1,414American Airlines
Mon, Jan 25 - Fri, Feb 12
Qantas Airways Logo
6:45 pm - 9:00 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
21h 15m1 stop Los Angeles
Qantas Airways Logo
8:55 am - 4:15 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
24h 20m2 stops Auckland Intl Los Angeles
$1,415Qantas Airways
Sat, Nov 28 - Sat, Dec 5
Qantas Airways Logo
6:45 pm - 9:00 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
21h 15m1 stop Los Angeles
Qantas Airways Logo
8:55 am - 3:59 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
24h 04m2 stops Auckland Intl Los Angeles
$1,415Qantas Airways
Tue, Dec 29 - Sat, Jan 23
American Airlines Logo
6:45 pm - 9:00 amORD  Chicago O'Hare Intl-SYD Sydney Kingsford Smith
21h 15m1 stop Los Angeles
American Airlines Logo
2:05 pm - 11:11 pmSYD  Sydney Kingsford Smith-ORD Chicago O'Hare Intl
26h 06m1 stop Dallas/Fort Worth
$1,415American Airlines
Wed, Feb 3 - Sun, Feb 21

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Air New Zealand flights from Chicago O'Hare Intl Airport to Sydney

Our best Air New Zealand deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Air New Zealand
Feb 8
ORD2:33 pmChicago O'Hare Intl
27h 02m
2 stops
SYD10:35 amSydney Kingsford Smith
Feb 22
SYD7:25 pmSydney Kingsford Smith
41h 31m
2 stops
ORD7:56 pmChicago O'Hare Intl
$1,313
Air New Zealand
Dec 1
ORD6:15 pmChicago O'Hare Intl
58h 35m
2 stops
SYD9:50 pmSydney Kingsford Smith
Jan 13
SYD9:55 amSydney Kingsford Smith
27h 45m
2 stops
ORD8:40 pmChicago O'Hare Intl
$1,326
Air New Zealand
Feb 2
ORD12:40 pmChicago O'Hare Intl
26h 55m
2 stops
SYD8:35 amSydney Kingsford Smith
Feb 18
SYD11:50 amSydney Kingsford Smith
25h 50m
2 stops
ORD8:40 pmChicago O'Hare Intl
$1,328

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

Our best American Airlines deals on Chicago O'Hare Intl Airport to Sydney flight tickets
American Airlines
Jan 25
ORD3:29 pmChicago O'Hare Intl
24h 31m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 12
SYD2:05 pmSydney Kingsford Smith
25h 00m
1 stop
ORD10:05 pmChicago O'Hare Intl
$1,414
American Airlines
Feb 3
ORD6:45 pmChicago O'Hare Intl
21h 15m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 21
SYD2:05 pmSydney Kingsford Smith
26h 06m
1 stop
ORD11:11 pmChicago O'Hare Intl
$1,415

momondo Fare Finder

 
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.

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Route

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Price

Cheapest round-trip

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 2/8

2:33 pm-10:35 am

2 stops27h 02m

Sydney Kingsford Smith

Mon 2/22

7:25 pm-7:56 pm

2 stops41h 31m

$1,313

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 12/1

6:15 pm-9:50 pm

2 stops58h 35m

Sydney Kingsford Smith

Wed 1/13

9:55 am-8:40 pm

2 stops27h 45m

$1,326

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Fri 2/5

7:30 am-6:25 am

2 stops29h 55m

Sydney Kingsford Smith

Thu 2/18

9:20 am-10:57 pm

1 stop30h 37m

$1,335

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sun 2/14

6:00 am-8:35 am

3 stops33h 35m

Sydney Kingsford Smith

Fri 2/19

11:50 am-12:26 am

3 stops29h 36m

$1,337

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 4/27

7:20 pm-5:05 pm

1 stop30h 45m

Sydney Kingsford Smith

Wed 5/5

7:00 pm-3:05 pm

2 stops35h 05m

$1,408

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/25

6:50 pm-10:20 pm

2 stops34h 30m

Sydney Kingsford Smith

Wed 2/10

10:10 pm-2:30 pm

1 stop33h 20m

$1,408

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Mon 1/25

3:29 pm-9:00 am

1 stop24h 31m

Sydney Kingsford Smith

Fri 2/12

2:05 pm-10:05 pm

1 stop25h 00m

$1,414

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Sat 11/28

6:45 pm-9:00 am

1 stop21h 15m

Sydney Kingsford Smith

Sat 12/5

8:55 am-4:15 pm

2 stops24h 20m

$1,415
Quickest round-trip

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Tue 12/29

6:45 pm-9:00 am

1 stop21h 15m

Sydney Kingsford Smith

Sat 1/23

8:55 am-3:59 pm

2 stops24h 04m

$1,415

ChicagoSydney

ORD Chicago O'Hare Intl - SYD Sydney Kingsford Smith

ORDSYD

Chicago O'Hare Intl

Wed 2/3

6:45 pm-9:00 am

1 stop21h 15m

Sydney Kingsford Smith

Sun 2/21

2:05 pm-11:11 pm

1 stop26h 06m

$1,415

Flights are sorted by cheapest round-trip 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 typical price of a round-trip flight between Chicago O'Hare Intl Airport and Sydney?

Prices are currently typical for flights on this route.

Typical prices usually range from $1,264 to $1,466.
The lowest price recently found on this route was $1,320.

What is the cheapest month to fly to Sydney?

In general, January is the cheapest month to fly from Chicago O'Hare Intl Airport to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,238. If you are unable to visit Sydney during the month of January, then departing from Chicago O'Hare Intl Airport during the month June is also very affordable. Most momondo users find prices during this month for around $1,282.

How far in advance should I book a flight from Chicago O'Hare Intl Airport 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 $1,500 when searching weeks out. 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 $1,081 on momondo.

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

You could potentially save up to 8% 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 November 2026, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 12% more expensive 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 round-trip 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

Best Price Found

$571

Fastest flight time

21h 50m

Direct flights

None
The best one-way flight to Sydney from Chicago O'Hare Intl Airport in the past 72 hours is $571. The best round-trip flight deal from Chicago O'Hare Intl Airport to Sydney found on momondo in the last 72 hours is $1,313.
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 21h 50m
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

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sydney

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

    Sydney Kingsford Smith is 9224.8 mi away from Chicago O'Hare Intl. 21h 50m is a normal flight duration for this route.

  • 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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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 travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
DeltaPriceFrom $237Free CancellationRating
7.8
8,698 reviews
Search Delta flights
Fiji AirwaysPriceFrom $716Free CancellationRating
8.0
262 reviews
Search Fiji Airways flights
Qantas AirwaysPriceFrom $894Free CancellationRating
7.5
1,122 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,021Free CancellationRating
7.0
12,231 reviews
Search American Airlines flights
Air CanadaPriceFrom $1,117Free CancellationRating
7.1
11,854 reviews
Search Air Canada flights
ANAPriceFrom $1,209Free CancellationRating
8.3
1,339 reviews
Search ANA flights
United AirlinesPriceFrom $1,238Free CancellationRating
7.3
10,462 reviews
Search United Airlines flights
Air New ZealandPriceFrom $1,279Free CancellationRating
8.0
681 reviews
Search Air New Zealand flights
Qatar AirwaysPriceFrom $1,382Free CancellationRating
7.4
3,711 reviews
Search Qatar Airways flights

Traveling to a place near Sydney?

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

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Sydney. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Chicago to Sydney on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Chicago to Sydney flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Chicago to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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