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>

$488 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

$898

Overall average: $947

Qantas Airways

Wed 1/21Tue 2/3

ORD - SYD • 1 stop

Cheapest one-way

$488

Typical prices: $415-$557

Multiple Airlines

Mon 2/9

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

Wed, Jan 21 - Tue, Feb 3

2:15 pm - 9:00 amORD-SYD

25h 45m1 stop

7:05 am - 4:49 pmSYD-ORD

26h 44m2 stops

$898Qantas Airways

Find Deal

Tue, Feb 10 - Tue, Mar 3

6:40 pm - 9:00 amORD-SYD

21h 20m1 stop

7:05 am - 4:39 pmSYD-ORD

26h 34m2 stops

$949Qantas Airways

Find Deal

Tue, Feb 10 - Tue, Mar 3

12:50 pm - 9:35 amORD-SYD

27h 45m2 stops

11:20 am - 8:00 amSYD-ORD

37h 40m2 stops

$951Air Canada

Find Deal

Tue, Feb 10 - Tue, Mar 3

7:15 am - 9:35 amORD-SYD

33h 20m3 stops

11:20 am - 8:00 amSYD-ORD

37h 40m2 stops

$957Air Canada

Find Deal

Mon, Jan 12 - Wed, Jan 21

3:35 pm - 6:05 pmORD-SYD

33h 30m2 stops

11:20 am - 2:41 pmSYD-ORD

20h 21m1 stop

$983Multiple Airlines

Find Deal

Mon, May 4 - Mon, May 18

4:30 pm - 7:20 amSTL-SYD

23h 50m2 stops

9:20 am - 3:16 pmSYD-STL

44h 56m2 stops

$1,026Multiple Airlines

Find Deal

Sun, Jan 18 - Sun, Feb 1

1:28 pm - 8:30 amMDW-SYD

26h 02m2 stops

10:40 am - 10:22 pmSYD-MDW

28h 42m2 stops

$1,151Delta

Find Deal

Tue, Feb 10 - Tue, Mar 3

10:48 am - 6:50 amMDW-SYD

27h 02m2 stops

10:40 am - 5:45 pmSYD-MDW

24h 05m2 stops

$1,165Delta

Find Deal

Mon, May 4 - Mon, May 18

1:30 pm - 7:00 amSTL-SYD

26h 30m2 stops

10:20 am - 6:22 pmSYD-STL

23h 02m1 stop

$1,165United Airlines

Find Deal

Thu, Jan 8 - Thu, Jan 15

6:30 am - 6:20 amPIA-SYD

30h 50m2 stops

2:00 pm - 8:47 pmSYD-PIA

23h 47m2 stops

$2,065United Airlines

Find Deal

Useful Info

Low season	September
High season	December
Cheapest flight	$488

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

Penrith

Terrigal

Katoomba

Coogee

Cronulla

Randwick

Charlestown

Lithgow

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

$488 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