What is the cheapest airline that flies from Chicago to Sydney Kingsford Smith?

Qantas Airways, American Airlines, and United Airlines are the most popular carriers operating from Chicago to Sydney Kingsford Smith

Which airlines fly to Sydney?

Qantas Airways, Air Canada and American Airlines are the top three most popular airlines that fly to Sydney from Chicago according to our data. Qantas Airways is the first choice among our users, with 45% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 3 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Chicago to Sydney Kingsford Smith Airport?

Prices for flights from Chicago to Sydney Kingsford Smith Airport were last updated today.

How many operators does momondo search for flights from Chicago to Sydney Kingsford Smith Airport?

As of October 2025, there are 3 operators available to choose from for flights from Chicago to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Chicago to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago 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.

$617 Cheap Flights from Chicago to Sydney in 2025/26

Q: What is the typical price of a round-trip flight between Chicago and Sydney?

Prices are currently low for flights on this route. Typical prices usually range from $1,315 to $2,250. The lowest price recently found on this route was $1,182.

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Find the cheapest flights from Chicago to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

15:40 - 08:20ORD-SYD

24h 40m1 stop

09:20 - 08:05SYD-ORD

37h 45m2 stops

$1,182Air Canada

Find Deal

Wed, 1 Apr - Tue, 14 Apr

15:40 - 08:20ORD-SYD

24h 40m1 stop

09:20 - 08:05SYD-ORD

37h 45m3 stops

$1,193Air Canada

Find Deal

Wed, 1 Apr - Tue, 14 Apr

15:40 - 09:35ORD-SYD

24h 55m1 stop

18:35 - 14:41SYD-ORD

37h 06m2 stops

$1,217Multiple Airlines

Find Deal

Sun, 7 Dec - Sat, 27 Dec

15:04 - 09:00ORD-SYD

24h 56m1 stop

17:45 - 21:25SYD-ORD

20h 40m1 stop

$1,220Qantas Airways

Find Deal

Wed, 26 Nov - Tue, 16 Dec

11:45 - 09:00ORD-SYD

28h 15m1 stop

17:45 - 23:59SYD-ORD

23h 14m1 stop

$1,225Qantas Airways

Find Deal

Thu, 13 Nov - Wed, 3 Dec

15:40 - 09:35ORD-SYD

24h 55m1 stop

07:45 - 16:44SYD-ORD

25h 59m2 stops

$1,233Multiple Airlines

Find Deal

Wed, 26 Nov - Tue, 16 Dec

15:00 - 09:00ORD-SYD

25h 00m1 stop

21:25 - 05:29SYD-ORD

25h 04m1 stop

$1,300American Airlines

Find Deal

Sun, 16 Nov - Sun, 23 Nov

09:35 - 09:00ORD-SYD

30h 25m1 stop

11:20 - 17:28SYD-ORD

23h 08m2 stops

$1,303American Airlines

Find Deal

Sun, 7 Dec - Sat, 27 Dec

15:47 - 09:05ORD-SYD

24h 18m1 stop

14:00 - 17:01SYD-ORD

20h 01m1 stop

$1,328United Airlines

Find Deal

Tue, 30 Dec - Sun, 1 Feb

12:45 - 07:00ORD-SYD

25h 15m1 stop

11:50 - 14:43SYD-ORD

19h 53m1 stop

$1,340United Airlines

Find Deal

Wed, 25 Feb - Mon, 2 Mar

Air Canada flights from Chicago to Sydney

Our best Air Canada deals on Chicago to Sydney flight tickets

Air Canada

1 Apr

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD08:20Sydney Kingsford Smith

14 Apr

SYD09:20Sydney Kingsford Smith

37h 45m

2 stops

ORD08:05Chicago O'Hare Intl

$1,182

Find similar

Air Canada

1 Apr

ORD15:40Chicago O'Hare Intl

24h 40m

1 stop

SYD08:20Sydney Kingsford Smith

14 Apr

SYD09:20Sydney Kingsford Smith

37h 45m

3 stops

ORD08:05Chicago O'Hare Intl

$1,193

Find similar

Air Canada

7 Dec

ORD07:20Chicago O'Hare Intl

33h 15m

2 stops

SYD09:35Sydney Kingsford Smith

21 Dec

SYD11:20Sydney Kingsford Smith

20h 21m

1 stop

ORD14:41Chicago O'Hare Intl

$1,196

Find similar

Qantas Airways flights from Chicago to Sydney

Our best Qantas Airways deals on Chicago to Sydney flight tickets

Qantas Airways

26 Nov

ORD15:04Chicago O'Hare Intl

24h 56m

1 stop

SYD09:00Sydney Kingsford Smith

16 Dec

SYD17:45Sydney Kingsford Smith

20h 40m

1 stop

ORD21:25Chicago O'Hare Intl

$1,220

Find similar

Qantas Airways

13 Nov

ORD11:45Chicago O'Hare Intl

28h 15m

1 stop

SYD09:00Sydney Kingsford Smith

3 Dec

SYD17:45Sydney Kingsford Smith

23h 14m

1 stop

ORD23:59Chicago O'Hare Intl

$1,225

Find similar

Qantas Airways

23 Oct

ORD15:14Chicago O'Hare Intl

24h 51m

1 stop

SYD08:05Sydney Kingsford Smith

25 Oct

SYD10:10Sydney Kingsford Smith

21h 55m

1 stop

ORD16:05Chicago O'Hare Intl

$1,230

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 1/4

15:40-08:20

1 stop24h 40m

Sydney Kingsford Smith

Tue 14/4

09:20-08:05

2 stops37h 45m

$1,182

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 1/4

15:40-08:20

1 stop24h 40m

Sydney Kingsford Smith

Tue 14/4

09:20-08:05

3 stops37h 45m

$1,193

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 7/12

15:40-09:35

1 stop24h 55m

Sydney Kingsford Smith

Sat 27/12

18:35-14:41

2 stops37h 06m

$1,217

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 26/11

15:04-09:00

1 stop24h 56m

Sydney Kingsford Smith

Tue 16/12

17:45-21:25

1 stop20h 40m

$1,220

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 13/11

11:45-09:00

1 stop28h 15m

Sydney Kingsford Smith

Wed 3/12

17:45-23:59

1 stop23h 14m

$1,225

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 26/11

15:40-09:35

1 stop24h 55m

Sydney Kingsford Smith

Tue 16/12

07:45-16:44

2 stops25h 59m

$1,233

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 16/11

15:00-09:00

1 stop25h 00m

Sydney Kingsford Smith

Sun 23/11

21:25-05:29

1 stop25h 04m

$1,300

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 7/12

09:35-09:00

1 stop30h 25m

Sydney Kingsford Smith

Sat 27/12

11:20-17:28

2 stops23h 08m

$1,303

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 30/12

15:47-09:05

1 stop24h 18m

Sydney Kingsford Smith

Sun 1/2

14:00-17:01

1 stop20h 01m

$1,328

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 25/2

12:45-07:00

1 stop25h 15m

Sydney Kingsford Smith

Mon 2/3

11:50-14:43

1 stop19h 53m

$1,340

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 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

What is the typical price of a round-trip flight between Chicago and Sydney?

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from Chicago, with most prices found around $1,310. If you aren’t able to travel to Sydney during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $1,317.

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

Our data shows that Sunday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,816. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,495.

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 afternoon. momondo users have found flights departing from Chicago to Sydney in the afternoon for as low as $2,125. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are $3,248 on average. Flights to Sydney from Chicago at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Sydney from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,671 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 for as low as $1,322 on momondo.

Can stopping save me money on Chicago to Sydney flights?

You could potentially save up to 38% on your flight if you consider stops on a Chicago to Sydney flight.

How have Chicago to Sydney flight prices changed over time?

As of October 2025, prices for Chicago to Sydney flights are approximately 57% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Chicago to Sydney (CHI to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Sydney

Direct flights	None

There are no direct flights from Chicago to Sydney. There are no popular flight routes from Chicago to Sydney.

Search flight deals

How far is Chicago to Sydney Kingsford Smith by plane?
Chicago and Sydney Kingsford Smith are 14866.2 km apart from one another. A reasonable flight in good conditions will take 21h 43m.
When did momondo last update prices for flights from Chicago to Sydney Kingsford Smith Airport?
Prices for flights from Chicago to Sydney Kingsford Smith Airport were last updated today.
How many operators does momondo search for flights from Chicago to Sydney Kingsford Smith Airport?
As of October 2025, there are 3 operators available to choose from for flights from Chicago to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Chicago to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago 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 to Sydney?
momondo data reveals that the most frequently booked airline on the route from Chicago to Sydney is Qantas Airways, representing 100% of all bookings.

Best airlines flying from Chicago to Sydney

Compare and see reviews for airlines that fly from Chicago to Sydney with momondo

Airline	Rating	Free cancellation	Price
Air Canada	PriceFrom $1,279	Free cancellation	Rating 7.1 10,334 reviews	Search Air Canada flights
American Airlines	PriceFrom $1,318	Free cancellation	Rating 7.2 11,026 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,345	Free cancellation	Rating 7.5 922 reviews	Search Qantas Airways flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Leura

Manly

Bondi Beach

Coogee

Randwick

Cronulla

Charlestown

Newport

Swansea

Why use momondo?

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

It is quick and easy to find Chicago to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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

Yes. momondo enables you to select and highlight flights to Sydney from Chicago with this policy.

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.