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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $527

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 10/25. 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 round-trip flights

Multiple Airlines Logo
12:28 pm - 8:05 amORD-SYD
27h 37m2 stops
Multiple Airlines Logo
2:05 pm - 1:11 amSYD-ORD
27h 06m2 stops
$1,075Multiple Airlines
Find Deal
Mon, Oct 20 - Sun, Nov 2
Fiji Airways Logo
4:45 pm - 12:30 pmORD-SYD
26h 45m2 stops
Fiji Airways Logo
2:10 pm - 7:18 pmSYD-ORD
22h 08m2 stops
$1,102Fiji Airways
Find Deal
Sat, Feb 28 - Sat, Mar 7
Multiple Airlines Logo
5:05 am - 9:00 amORD-SYD
35h 55m2 stops
Multiple Airlines Logo
2:05 pm - 12:11 amSYD-ORD
27h 06m2 stops
$1,105Multiple Airlines
Find Deal
Mon, Oct 27 - Sun, Nov 9
ANA Logo
4:25 pm - 8:15 pmORD-SYD
34h 50m1 stop
ANA Logo
12:25 pm - 8:54 amSYD-ORD
37h 29m2 stops
$1,129ANA
Find Deal
Mon, Feb 16 - Sun, Mar 1
Hawaiian Airlines Logo
2:00 pm - 7:45 pmORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
9:40 pm - 1:04 pmSYD-ORD
32h 24m2 stops
$1,135Hawaiian Airlines
Find Deal
Tue, Feb 17 - Tue, Mar 3
Hawaiian Airlines Logo
2:00 pm - 7:45 pmORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
9:40 pm - 1:04 pmSYD-ORD
31h 24m2 stops
$1,136Hawaiian Airlines
Find Deal
Tue, Feb 24 - Tue, Mar 10
ANA Logo
4:25 pm - 8:15 pmORD-SYD
34h 50m1 stop
ANA Logo
12:25 pm - 9:37 amSYD-ORD
37h 12m2 stops
$1,144ANA
Find Deal
Tue, Mar 3 - Wed, Mar 18
ANA Logo
7:10 am - 8:15 pmORD-SYD
44h 05m2 stops
ANA Logo
12:25 pm - 9:37 amSYD-ORD
37h 12m2 stops
$1,148ANA
Find Deal
Tue, Mar 3 - Wed, Mar 18
Hawaiian Airlines Logo
2:00 pm - 7:45 pmORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
9:40 pm - 1:04 pmSYD-ORD
32h 24m2 stops
$1,156Hawaiian Airlines
Find Deal
Wed, Feb 4 - Fri, Feb 13
Fiji Airways Logo
4:45 pm - 12:30 pmORD-SYD
26h 45m2 stops
Fiji Airways Logo
2:10 pm - 7:18 pmSYD-ORD
22h 08m2 stops
$1,167Fiji Airways
Find Deal
Sat, Feb 7 - Sat, Feb 14

ANA flights from Chicago O'Hare Intl Airport to Sydney

Our best ANA deals on Chicago O'Hare Intl Airport to Sydney flight tickets
ANA
Feb 16
ORD4:25 pmChicago O'Hare Intl
34h 50m
1 stop
SYD8:15 pmSydney Kingsford Smith
Mar 1
SYD12:25 pmSydney Kingsford Smith
37h 29m
2 stops
ORD8:54 amChicago O'Hare Intl
$1,129
Find similar
ANA
Mar 3
ORD4:25 pmChicago O'Hare Intl
34h 50m
1 stop
SYD8:15 pmSydney Kingsford Smith
Mar 18
SYD12:25 pmSydney Kingsford Smith
37h 12m
2 stops
ORD9:37 amChicago O'Hare Intl
$1,144
Find similar
ANA
Mar 3
ORD7:10 amChicago O'Hare Intl
44h 05m
2 stops
SYD8:15 pmSydney Kingsford Smith
Mar 18
SYD12:25 pmSydney Kingsford Smith
37h 12m
2 stops
ORD9:37 amChicago O'Hare Intl
$1,148
Find similar

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

Our best Hawaiian Airlines deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Hawaiian Airlines
Feb 17
ORD2:00 pmChicago O'Hare Intl
36h 45m
2 stops
SYD7:45 pmSydney Kingsford Smith
Mar 3
SYD9:40 pmSydney Kingsford Smith
32h 24m
2 stops
ORD1:04 pmChicago O'Hare Intl
$1,135
Find similar
Hawaiian Airlines
Feb 24
ORD2:00 pmChicago O'Hare Intl
36h 45m
2 stops
SYD7:45 pmSydney Kingsford Smith
Mar 10
SYD9:40 pmSydney Kingsford Smith
31h 24m
2 stops
ORD1:04 pmChicago O'Hare Intl
$1,136
Find similar
Hawaiian Airlines
Feb 4
ORD2:00 pmChicago O'Hare Intl
36h 45m
2 stops
SYD7:45 pmSydney Kingsford Smith
Feb 13
SYD9:40 pmSydney Kingsford Smith
32h 24m
2 stops
ORD1:04 pmChicago O'Hare Intl
$1,156
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated September 17, 2025.
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

Mon 10/20

12:28 pm-8:05 am

2 stops27h 37m

Sydney Kingsford Smith

Sun 11/2

2:05 pm-1:11 am

2 stops27h 06m

$1,075

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/28

4:45 pm-12:30 pm

2 stops26h 45m

Sydney Kingsford Smith

Sat 3/7

2:10 pm-7:18 pm

2 stops22h 08m

$1,102

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/27

5:05 am-9:00 am

2 stops35h 55m

Sydney Kingsford Smith

Sun 11/9

2:05 pm-12:11 am

2 stops27h 06m

$1,105

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/16

4:25 pm-8:15 pm

1 stop34h 50m

Sydney Kingsford Smith

Sun 3/1

12:25 pm-8:54 am

2 stops37h 29m

$1,129

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 2/17

2:00 pm-7:45 pm

2 stops36h 45m

Sydney Kingsford Smith

Tue 3/3

9:40 pm-1:04 pm

2 stops32h 24m

$1,135

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 2/24

2:00 pm-7:45 pm

2 stops36h 45m

Sydney Kingsford Smith

Tue 3/10

9:40 pm-1:04 pm

2 stops31h 24m

$1,136

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

4:25 pm-8:15 pm

1 stop34h 50m

Sydney Kingsford Smith

Wed 3/18

12:25 pm-9:37 am

2 stops37h 12m

$1,144

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

7:10 am-8:15 pm

2 stops44h 05m

Sydney Kingsford Smith

Wed 3/18

12:25 pm-9:37 am

2 stops37h 12m

$1,148

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 2/4

2:00 pm-7:45 pm

2 stops36h 45m

Sydney Kingsford Smith

Fri 2/13

9:40 pm-1:04 pm

2 stops32h 24m

$1,156

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/7

4:45 pm-12:30 pm

2 stops26h 45m

Sydney Kingsford Smith

Sat 2/14

2:10 pm-7:18 pm

2 stops22h 08m

$1,167

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

What is the cheapest month to fly to Sydney?

In general, March 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 $856. If you are unable to visit Sydney during the month of March, then departing from Chicago O'Hare Intl Airport during the month May is also very affordable. Most momondo users find prices during this month for around $871.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Chicago O'Hare Intl Airport to Sydney is on a Saturday when prices can be found for as low as $1,166. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,391.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Chicago O'Hare Intl Airport to Sydney in the morning for as low as $1,224. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,412. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,105 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 $859 on momondo.

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

You could potentially save up to 9% 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 September 2025, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 63% 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 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

Direct flights

None
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.
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  • 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. 25h 05m 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
ANAPriceFrom $679Free CancellationRating
8.4
964 reviews
Search ANA flights
Qantas AirwaysPriceFrom $812Free CancellationRating
7.5
907 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $823Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.0
205 reviews
Search Fiji Airways flights
Air CanadaPriceFrom $959Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Air New ZealandPriceFrom $1,282Free CancellationRating
8.0
505 reviews
Search Air New Zealand flights
United AirlinesPriceFrom $1,336Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights

Traveling to a place near Sydney?

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