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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $406

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 9/9. 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

Air Canada Logo
3:40 pm - 7:20 amORD-SYD
24h 40m1 stop
Air Canada Logo
9:20 am - 3:00 pmSYD-ORD
20h 40m1 stop
$800Air Canada
Find Deal
dom., ago. 24 - mar., sep. 9
Air Canada Logo
7:15 am - 8:35 amORD-SYD
33h 20m2 stops
Air Canada Logo
11:20 am - 8:00 amSYD-ORD
37h 40m2 stops
$836Air Canada
Find Deal
mié., oct. 29 - mié., nov. 12
Air Canada Logo
10:40 am - 8:20 amORD-SYD
29h 40m2 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m3 stops
$842Air Canada
Find Deal
mié., oct. 22 - mié., oct. 29
Air Canada Logo
10:40 am - 8:20 amORD-SYD
29h 40m2 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m3 stops
$843Air Canada
Find Deal
mié., oct. 22 - mié., oct. 29
Air Canada Logo
1:19 pm - 8:35 amORD-SYD
27h 16m2 stops
Air Canada Logo
11:20 am - 8:00 amSYD-ORD
37h 40m3 stops
$849Air Canada
Find Deal
mar., oct. 28 - mar., nov. 18
Air Canada Logo
8:47 am - 8:20 amORD-SYD
31h 33m2 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m2 stops
$898Air Canada
Find Deal
mar., oct. 21 - vie., oct. 31
Air Canada Logo
8:47 am - 8:20 amORD-SYD
31h 33m2 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m2 stops
$899Air Canada
Find Deal
mar., oct. 21 - vie., oct. 31
Air Canada Logo
10:40 am - 8:20 amORD-SYD
29h 40m3 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m2 stops
$905Air Canada
Find Deal
mar., oct. 21 - vie., oct. 31
Logo
6:20 am - 12:45 pmORD-SYD
38h 25m2 stops
Logo
2:00 pm - 11:59 pmSYD-ORD
25h 59m2 stops
$964
Find Deal
lun., oct. 20 - dom., nov. 2
Logo
6:20 am - 12:45 pmORD-SYD
38h 25m2 stops
Logo
6:00 am - 10:59 pmSYD-ORD
33h 59m2 stops
$985
Find Deal
lun., oct. 27 - dom., nov. 9

Air Canada flights from Chicago O'Hare Intl Airport to Sydney

Our best Air Canada deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Air Canada
Aug 24
ORD3:40 pmChicago O'Hare Intl
24h 40m
1 stop
SYD7:20 amSydney Kingsford Smith
Sep 9
SYD9:20 amSydney Kingsford Smith
20h 40m
1 stop
ORD3:00 pmChicago O'Hare Intl
$800
Find similar
Air Canada
Aug 4
ORD3:40 pmChicago O'Hare Intl
24h 40m
1 stop
SYD7:20 amSydney Kingsford Smith
Aug 19
SYD9:20 amSydney Kingsford Smith
25h 44m
1 stop
ORD8:04 pmChicago O'Hare Intl
$802
Find similar
Air Canada
Oct 29
ORD7:15 amChicago O'Hare Intl
33h 20m
2 stops
SYD8:35 amSydney Kingsford Smith
Nov 12
SYD11:20 amSydney Kingsford Smith
37h 40m
2 stops
ORD8:00 amChicago O'Hare Intl
$836
Find similar

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
Aug 3
ORD3:21 pmChicago O'Hare Intl
24h 44m
1 stop
SYD7:05 amSydney Kingsford Smith
Aug 24
SYD9:10 amSydney Kingsford Smith
22h 38m
1 stop
ORD4:48 pmChicago O'Hare Intl
$1,693
Find similar
Qantas Airways
Aug 2
ORD10:00 amChicago O'Hare Intl
30h 05m
1 stop
SYD7:05 amSydney Kingsford Smith
Aug 30
SYD12:10 pmSydney Kingsford Smith
22h 02m
1 stop
ORD7:12 pmChicago O'Hare Intl
$1,732
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 julio 31, 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

dom. 8/24

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

mar. 9/9

9:20 am-3:00 pm

1 stop20h 40m

$800

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 10/29

7:15 am-8:35 am

2 stops33h 20m

Sydney Kingsford Smith

mié. 11/12

11:20 am-8:00 am

2 stops37h 40m

$836

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 10/22

10:40 am-8:20 am

2 stops29h 40m

Sydney Kingsford Smith

mié. 10/29

10:20 am-8:00 am

3 stops37h 40m

$842

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 10/22

10:40 am-8:20 am

2 stops29h 40m

Sydney Kingsford Smith

mié. 10/29

10:20 am-8:00 am

3 stops37h 40m

$843

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/28

1:19 pm-8:35 am

2 stops27h 16m

Sydney Kingsford Smith

mar. 11/18

11:20 am-8:00 am

3 stops37h 40m

$849

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/21

8:47 am-8:20 am

2 stops31h 33m

Sydney Kingsford Smith

vie. 10/31

10:20 am-8:00 am

2 stops37h 40m

$898

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/21

8:47 am-8:20 am

2 stops31h 33m

Sydney Kingsford Smith

vie. 10/31

10:20 am-8:00 am

2 stops37h 40m

$899

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mar. 10/21

10:40 am-8:20 am

3 stops29h 40m

Sydney Kingsford Smith

vie. 10/31

10:20 am-8:00 am

2 stops37h 40m

$905

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 10/20

6:20 am-12:45 pm

2 stops38h 25m

Sydney Kingsford Smith

dom. 11/2

2:00 pm-11:59 pm

2 stops25h 59m

$964

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 10/27

6:20 am-12:45 pm

2 stops38h 25m

Sydney Kingsford Smith

dom. 11/9

6:00 am-10:59 pm

2 stops33h 59m

$985

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 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 $857. 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 $1,102 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 $911 on momondo.

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

You could potentially save up to 2% 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 July 2025, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 61% 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

Best Price Found

$406

Fastest flight time

22h 02m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Chicago O'Hare Intl Airport in the past 72 hours is $406. The best round-trip flight deal from Chicago O'Hare Intl Airport to Sydney found on momondo in the last 72 hours is $800.
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 22h 02m
There are no direct flights from Chicago O'Hare Intl Airport to Sydney. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)
Search flight deals

  • 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. 24h 35m 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
922 reviews
Search ANA flights
Qantas AirwaysPriceFrom $812Free CancellationRating
7.5
887 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $823Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.0
202 reviews
Search Fiji Airways flights
DeltaPriceFrom $851Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Air CanadaPriceFrom $992Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,202Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Air New ZealandPriceFrom $1,275Free CancellationRating
7.9
501 reviews
Search Air New Zealand 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
Coogee
Cronulla
Penrith
Manly
Charlestown
Lithgow
Swansea
Leura
Terrigal

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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