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 1 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 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.

$615 Cheap Flights from Chicago O'Hare Intl Airport to Sydney in 2026

1 adult

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

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

13:24 - 09:00

ORD

SYD

26h 36m

1 stop

07:05 - 14:53

SYD

ORD

24h 48m

2 stops

$1,334Qantas Airways

Thu, 26 Feb - Tue, 3 Mar

16:45 - 07:25

ORD

SYD

21h 40m

1 stop

07:05 - 14:53

SYD

ORD

24h 48m

2 stops

$1,340Qantas Airways

Thu, 26 Feb - Tue, 3 Mar

16:45 - 07:25

ORD

SYD

21h 40m

1 stop

07:05 - 14:53

SYD

ORD

24h 48m

2 stops

$1,345Qantas Airways

Mon, 23 Feb - Tue, 3 Mar

19:45 - 07:30

ORD

SYD

44h 45m

1 stop

13:15 - 06:46

SYD

ORD

32h 31m

2 stops

$1,347Multiple Airlines

Mon, 13 Apr - Thu, 30 Apr

09:25 - 09:00

ORD

SYD

30h 35m

1 stop

19:15 - 16:37

SYD

ORD

38h 22m

2 stops

$1,358Qantas Airways

Thu, 26 Feb - Tue, 3 Mar

18:49 - 20:50

ORD

SYD

34h 01m

2 stops

09:10 - 21:41

SYD

ORD

27h 31m

1 stop

$1,360Qantas Airways

Wed, 25 Mar - Mon, 6 Apr

16:49 - 07:35

ORD

SYD

45h 46m

2 stops

11:20 - 16:37

SYD

ORD

22h 17m

1 stop

$1,361Qantas Airways

Sat, 28 Feb - Fri, 6 Mar

06:00 - 07:30

ORD

SYD

34h 30m

1 stop

13:15 - 06:46

SYD

ORD

32h 31m

2 stops

$1,364Multiple Airlines

Sun, 10 May - Fri, 22 May

14:58 - 07:35

ORD

SYD

47h 37m

2 stops

11:20 - 17:46

SYD

ORD

22h 26m

1 stop

$1,374Qantas Airways

Sun, 1 Mar - Wed, 18 Mar

16:49 - 20:50

ORD

SYD

35h 01m

2 stops

11:20 - 14:53

SYD

ORD

19h 33m

1 stop

$1,375Qantas Airways

Tue, 3 Mar - Tue, 10 Mar

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

23h 15m

1 stop

SYD09:00Sydney Kingsford Smith

27 Feb

SYD07:05Sydney Kingsford Smith

26h 32m

2 stops

ORD16:37Chicago O'Hare Intl

$1,330

Qantas Airways

16 Feb

ORD16:45Chicago O'Hare Intl

23h 15m

1 stop

SYD09:00Sydney Kingsford Smith

24 Feb

SYD07:05Sydney Kingsford Smith

24h 48m

2 stops

ORD14:53Chicago O'Hare Intl

$1,331

Qantas Airways

26 Feb

ORD13:24Chicago O'Hare Intl

26h 36m

1 stop

SYD09:00Sydney Kingsford Smith

3 Mar

SYD07:05Sydney Kingsford Smith

24h 48m

2 stops

ORD14:53Chicago O'Hare Intl

$1,334

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 26/2

13:24-09:00

1 stop26h 36m

Sydney Kingsford Smith

Tue 3/3

07:05-14:53

2 stops24h 48m

$1,334

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 26/2

16:45-07:25

1 stop21h 40m

Sydney Kingsford Smith

Tue 3/3

07:05-14:53

2 stops24h 48m

$1,340

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 23/2

16:45-07:25

1 stop21h 40m

Sydney Kingsford Smith

Tue 3/3

07:05-14:53

2 stops24h 48m

$1,345

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 13/4

19:45-07:30

1 stop44h 45m

Sydney Kingsford Smith

Thu 30/4

13:15-06:46

2 stops32h 31m

$1,347

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 26/2

09:25-09:00

1 stop30h 35m

Sydney Kingsford Smith

Tue 3/3

19:15-16:37

2 stops38h 22m

$1,358

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 25/3

18:49-20:50

2 stops34h 01m

Sydney Kingsford Smith

Mon 6/4

09:10-21:41

1 stop27h 31m

$1,360

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 28/2

16:49-07:35

2 stops45h 46m

Sydney Kingsford Smith

Fri 6/3

11:20-16:37

1 stop22h 17m

$1,361

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 10/5

06:00-07:30

1 stop34h 30m

Sydney Kingsford Smith

Fri 22/5

13:15-06:46

2 stops32h 31m

$1,364

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/3

14:58-07:35

2 stops47h 37m

Sydney Kingsford Smith

Wed 18/3

11:20-17:46

1 stop22h 26m

$1,374

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

16:49-20:50

2 stops35h 01m

Sydney Kingsford Smith

Tue 10/3

11:20-14:53

1 stop19h 33m

$1,375

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 March is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,194. If you aren’t able to travel to Sydney during the month of March, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,540.

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 $1,788 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 $1,487 on momondo.

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

You could potentially save up to 19% 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 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	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.

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 23h 15m.
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 1 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 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?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Sydney, the leading airline is Qantas Airways, making up 100% of the total bookings.

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 Airways	PriceFrom $1,206	Free cancellation	Rating 7.5 988 reviews		Search Qantas Airways flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Manly

Leura

Coogee

Bondi Beach

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.