Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Sydney?

Dallas (DFW) has the shortest average layover time for this route: 1h 37m.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sydney?

Los Angeles (LAX) was the most common stop: 71% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Sydney?

Flights connecting via Los Angeles (LAX) have the shortest average one-way travel time: 20h 53m.

What airlines fly to Sydney?

Qantas Airways, American Airlines and United Airlines are the top three most popular airlines that fly to Sydney from Chicago O'Hare Intl Airport according to our data. Qantas Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Sydney?

Flights via Dallas (DFW) offer the lowest average round-trip price of $985.

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?

The number of operators available for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport is 8 as of February 2026.

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.

$435 Cheap Flights from Chicago O'Hare Intl Airport to Sydney in 2026

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:24 pm - 9:00 am

ORD

SYD

26h 36m

1 stop

7:05 am - 2:53 pm

SYD

ORD

24h 48m

2 stops

$944Qantas Airways

Thu, Feb 26 - Tue, Mar 3

4:45 pm - 7:25 am

ORD

SYD

21h 40m

1 stop

7:05 am - 2:53 pm

SYD

ORD

24h 48m

2 stops

$948Qantas Airways

Thu, Feb 26 - Tue, Mar 3

4:45 pm - 7:25 am

ORD

SYD

21h 40m

1 stop

7:05 am - 2:53 pm

SYD

ORD

24h 48m

2 stops

$952Qantas Airways

Mon, Feb 23 - Tue, Mar 3

7:45 pm - 7:30 am

ORD

SYD

44h 45m

1 stop

1:15 pm - 6:46 am

SYD

ORD

32h 31m

2 stops

$953Multiple Airlines

Mon, Apr 13 - Thu, Apr 30

9:25 am - 9:00 am

ORD

SYD

30h 35m

1 stop

7:15 pm - 4:37 pm

SYD

ORD

38h 22m

2 stops

$961Qantas Airways

Thu, Feb 26 - Tue, Mar 3

6:49 pm - 8:50 pm

ORD

SYD

34h 01m

2 stops

9:10 am - 9:41 pm

SYD

ORD

27h 31m

1 stop

$962Qantas Airways

Wed, Mar 25 - Mon, Apr 6

4:49 pm - 7:35 am

ORD

SYD

45h 46m

2 stops

11:20 am - 4:37 pm

SYD

ORD

22h 17m

1 stop

$963Qantas Airways

Sat, Feb 28 - Fri, Mar 6

6:00 am - 7:30 am

ORD

SYD

34h 30m

1 stop

1:15 pm - 6:46 am

SYD

ORD

32h 31m

2 stops

$965Multiple Airlines

Sun, May 10 - Fri, May 22

2:58 pm - 7:35 am

ORD

SYD

47h 37m

2 stops

11:20 am - 5:46 pm

SYD

ORD

22h 26m

1 stop

$972Qantas Airways

Sun, Mar 1 - Wed, Mar 18

2:58 pm - 8:50 pm

ORD

SYD

36h 52m

2 stops

11:20 am - 2:53 pm

SYD

ORD

19h 33m

1 stop

$973Qantas Airways

Tue, Mar 3 - Tue, Mar 10

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

Feb 12

ORD4:45 pmChicago O'Hare Intl

23h 15m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 27

SYD7:05 amSydney Kingsford Smith

26h 32m

2 stops

ORD4:37 pmChicago O'Hare Intl

$941

Qantas Airways

Feb 16

ORD4:45 pmChicago O'Hare Intl

23h 15m

1 stop

SYD9:00 amSydney Kingsford Smith

Feb 24

SYD7:05 amSydney Kingsford Smith

24h 48m

2 stops

ORD2:53 pmChicago O'Hare Intl

$942

Qantas Airways

Feb 26

ORD1:24 pmChicago O'Hare Intl

26h 36m

1 stop

SYD9:00 amSydney Kingsford Smith

Mar 3

SYD7:05 amSydney Kingsford Smith

24h 48m

2 stops

ORD2:53 pmChicago O'Hare Intl

$944

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.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 2/26

1:24 pm-9:00 am

1 stop26h 36m

Sydney Kingsford Smith

Tue 3/3

7:05 am-2:53 pm

2 stops24h 48m

$944

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 2/26

4:45 pm-7:25 am

1 stop21h 40m

Sydney Kingsford Smith

Tue 3/3

7:05 am-2:53 pm

2 stops24h 48m

$948

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/23

4:45 pm-7:25 am

1 stop21h 40m

Sydney Kingsford Smith

Tue 3/3

7:05 am-2:53 pm

2 stops24h 48m

$952

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 4/13

7:45 pm-7:30 am

1 stop44h 45m

Sydney Kingsford Smith

Thu 4/30

1:15 pm-6:46 am

2 stops32h 31m

$953

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 2/26

9:25 am-9:00 am

1 stop30h 35m

Sydney Kingsford Smith

Tue 3/3

7:15 pm-4:37 pm

2 stops38h 22m

$961

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 3/25

6:49 pm-8:50 pm

2 stops34h 01m

Sydney Kingsford Smith

Mon 4/6

9:10 am-9:41 pm

1 stop27h 31m

$962

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/28

4:49 pm-7:35 am

2 stops45h 46m

Sydney Kingsford Smith

Fri 3/6

11:20 am-4:37 pm

1 stop22h 17m

$963

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 5/10

6:00 am-7:30 am

1 stop34h 30m

Sydney Kingsford Smith

Fri 5/22

1:15 pm-6:46 am

2 stops32h 31m

$965

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 3/1

2:58 pm-7:35 am

2 stops47h 37m

Sydney Kingsford Smith

Wed 3/18

11:20 am-5:46 pm

1 stop22h 26m

$972

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

2:58 pm-8:50 pm

2 stops36h 52m

Sydney Kingsford Smith

Tue 3/10

11:20 am-2:53 pm

1 stop19h 33m

$973

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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

Prices

Airlines

Layovers

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 $845. If you are unable to visit Sydney during the month of March, then departing from Chicago O'Hare Intl Airport during the month August is also very affordable. Most momondo users find prices during this month for around $1,090.

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 $1,265 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 $1,052 on momondo.

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

You could potentially save up to 1% 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 February 2026, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 15% 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

Fastest flight time	23h 15m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 23h 15m

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. 23h 15m 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?
The number of operators available for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport is 8 as of February 2026.
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?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Sydney, the leading airline is Qantas Airways, making up 41% of the total bookings. Other popular airlines include American Airlines with 21%, United Airlines with 16%, and Air Canada with 12%.

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
Fiji Airways	PriceFrom $795	Free Cancellation	Rating 8.0 225 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $804	Free Cancellation	Rating 7.2 11,266 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $812	Free Cancellation	Rating 7.5 988 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $870	Free Cancellation	Rating 7.4 9,274 reviews	Search United Airlines flights
Air Canada	PriceFrom $890	Free Cancellation	Rating 7.1 10,705 reviews	Search Air Canada flights
Delta	PriceFrom $935	Free Cancellation	Rating 7.9 8,180 reviews	Search Delta flights
ANA	PriceFrom $1,177	Free Cancellation	Rating 8.4 1,090 reviews	Search ANA flights
Air New Zealand	PriceFrom $1,282	Free Cancellation	Rating 8.0 582 reviews	Search Air New Zealand flights

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Parramatta

Katoomba

Wollongong

Penrith

Coogee

Manly

Randwick

Lithgow

Leura

Cronulla

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

What is the cheapest month to fly to Sydney?

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

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

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

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sydney?

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Sydney?

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Sydney?

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Sydney?

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

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

Direct flights

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

Traveling to a place near Sydney?

Why use momondo?

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

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

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

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

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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