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>

$512 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 23% 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

$940

Overall average: $905

Qantas Airways

Fri 2/20Sat 3/7

ORD - SYD • 2 stops

Cheapest one-way

$512

Typical prices: $437-$829

Multiple Airlines

Wed 2/18

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

Fri, Feb 20 - Sat, Mar 7

2:58 pm - 7:35 am

ORD

SYD

47h 37m

2 stops

11:20 am - 2:53 pm

SYD

ORD

20h 33m

1 stop

$940Qantas Airways

Sat, Feb 14 - Sat, Feb 21

6:38 am - 7:35 am

STL

SYD

55h 57m

2 stops

11:20 am - 11:59 pm

SYD

STL

29h 39m

1 stop

$940Qantas Airways

Mon, Feb 9 - Mon, Feb 16

6:40 pm - 9:00 am

ORD

SYD

21h 20m

1 stop

7:15 pm - 4:37 pm

SYD

ORD

38h 22m

2 stops

$941Qantas Airways

Fri, Feb 27 - Fri, Mar 6

2:51 pm - 9:15 am

PIA

SYD

25h 24m

2 stops

2:00 pm - 8:39 pm

SYD

PIA

23h 39m

2 stops

$1,289United Airlines

Fri, Feb 20 - Sun, Mar 8

6:00 am - 7:25 am

MDW

SYD

32h 25m

2 stops

11:20 am - 12:08 pm

SYD

MDW

41h 48m

2 stops

$1,443Multiple Airlines

Tue, Mar 10 - Tue, Mar 24

12:47 pm - 6:05 am

MDW

SYD

25h 18m

2 stops

9:40 am - 5:54 pm

SYD

MDW

24h 14m

2 stops

$1,469Delta

Tue, May 26 - Wed, Jun 10

2:00 pm - 6:35 am

MDW

SYD

25h 35m

2 stops

9:15 am - 6:31 pm

SYD

MDW

24h 16m

2 stops

$1,470Delta

Fri, Feb 13 - Tue, Feb 17

1:25 pm - 6:20 am

PIA

SYD

23h 55m

2 stops

12:10 pm - 8:37 pm

SYD

PIA

25h 27m

2 stops

$1,471United Airlines

Fri, Feb 27 - Fri, Mar 6

6:10 am - 6:55 am

PIA

SYD

31h 45m

1 stop

11:20 am - 6:25 pm

SYD

PIA

24h 05m

2 stops

$1,553American Airlines

Fri, Feb 27 - Fri, Mar 6

5:00 am - 8:50 pm

PIA

SYD

46h 50m

2 stops

7:45 pm - 11:25 pm

SYD

PIA

44h 40m

3 stops

$1,838Multiple Airlines

Useful Info

Low season	September
High season	December
Cheapest flight	$512

Best time to beat the crowds with an average 5% drop in price.

Most popular time to fly with an average 50% 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

$495 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