How does KAYAK find such low prices on flights from Illinois to Sydney?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Sydney. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sydney?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Sydney?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sydney?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$563 CHEAP FLIGHTS from Illinois to Sydney

SYD

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$911

Overall average: $1,218

Qantas Airways

Sat 1/17Sun 2/1

ORD - SYD • 2 stops

Cheapest one-way

$563

Typical prices: $418-$851

Multiple Airlines

Sat 1/24

ORD - SYD • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Sydney!

Flight Deals

Cheap Flights from Illinois to Sydney

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Sydney

Sat, Jan 17 - Sun, Feb 1

5:30 pm - 9:10 am

ORD

SYD

46h 40m2 stops

11:20 am - 2:57 pm

SYD

ORD

20h 37m1 stop

$911Qantas Airways

Tue, Jan 20 - Wed, Jan 28

6:40 pm - 9:00 am

ORD

SYD

21h 20m1 stop

7:05 am - 4:49 pm

SYD

ORD

26h 44m2 stops

$952Qantas Airways

Tue, May 5 - Tue, May 26

8:45 am - 7:20 am

ORD

SYD

31h 35m1 stop

9:20 am - 4:50 pm

SYD

ORD

22h 30m2 stops

$953Air Canada

Sun, Feb 1 - Sun, Feb 15

3:35 pm - 9:35 am

ORD

SYD

25h 00m1 stop

11:20 am - 2:41 pm

SYD

ORD

20h 21m1 stop

$954Air Canada

Wed, Jan 28 - Wed, Feb 4

5:12 pm - 6:55 am

STL

SYD

20h 43m1 stop

5:45 pm - 11:59 pm

SYD

STL

23h 14m1 stop

$1,147American Airlines

Wed, Jan 28 - Wed, Feb 4

3:20 pm - 9:00 am

STL

SYD

24h 40m2 stops

11:20 am - 6:14 pm

SYD

STL

23h 54m2 stops

$1,150American Airlines

Sun, May 24 - Mon, Jun 8

2:00 pm - 6:35 am

MDW

SYD

25h 35m2 stops

9:25 am - 6:05 pm

SYD

MDW

23h 40m2 stops

$1,155Delta

Wed, Jan 21 - Wed, Jan 28

11:20 am - 6:20 am

STL

SYD

26h 00m2 stops

12:10 pm - 3:37 pm

SYD

STL

20h 27m1 stop

$1,163United Airlines

Sun, Jan 18 - Wed, Feb 4

1:28 pm - 6:50 am

MDW

SYD

24h 22m2 stops

10:40 am - 5:29 pm

SYD

MDW

23h 49m2 stops

$1,167Delta

Wed, Jan 21 - Wed, Jan 28

2:45 pm - 9:15 am

STL

SYD

25h 30m2 stops

12:10 pm - 7:27 pm

SYD

STL

24h 17m2 stops

$1,167United Airlines

Useful Info

Low season	September
High season	December
Cheapest flight	$563

Best time to beat the crowds with an average 2% drop in price.

Most popular time to fly with an average 46% increase in price.

Flight from Chicago O'Hare Airport to Sydney

How does KAYAK find such low prices on flights from Illinois to Sydney?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Sydney.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sydney?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Sydney?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sydney?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Parramatta

Terrigal

Penrith

Katoomba

Coogee

Cronulla

Randwick

Lithgow

Charlestown

Swansea

Brooklyn

Newport

Everything you need to know for your flight to Sydney

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Sydney

Sydney (SYD)

SYD

$553 Find Cheap Flights from Illinois to Sydney

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

Everything you should know

Cheap Flights from Illinois to Sydney

Recent round-trip flight deals from Illinois to Sydney

Recent one-way flight deals from Illinois to Sydney

Recent last minute flight deals from Illinois to Sydney

Good to know

FAQs for booking flights from Illinois to Sydney

How does KAYAK find such low prices on flights from Illinois to Sydney?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Sydney.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sydney?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Sydney?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sydney?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Sydney?

Everything you need to know for your flight to Sydney

Information on the airport you'll fly into in Sydney

Cabin class types available on flights to Illinois

Complete your trip to Sydney with a hotel stay or car rental

Find direct flights for Sydney

Flights to other popular destinations

Flights from domestic origins to Sydney

Choose which airport to fly into in Sydney

Find deals for your return flight