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>

$454 CHEAP FLIGHTS from Illinois to Sydney

SYD

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

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Cheap Flights from Illinois to Sydney

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, Mar 7 - Sat, Mar 14

4:49 pm - 9:10 am

ORD

SYD

47h 21m

2 stops

11:20 am - 9:35 pm

SYD

ORD

26h 15m

1 stop

$960Qantas Airways

Fri, May 22 - Sun, May 31

12:44 pm - 11:50 am

ORD

SYD

32h 06m

2 stops

1:15 pm - 5:23 am

SYD

ORD

31h 08m

2 stops

$1,010Multiple Airlines

Mon, May 4 - Mon, May 18

1:00 pm - 7:20 am

STL

SYD

27h 20m

2 stops

9:20 am - 8:05 pm

SYD

STL

25h 45m

2 stops

$1,081Air Canada

Mon, May 4 - Mon, May 18

1:00 pm - 7:20 am

STL

SYD

51h 20m

3 stops

9:20 am - 8:05 pm

SYD

STL

25h 45m

2 stops

$1,089Air Canada

Mon, May 4 - Mon, May 18

1:02 pm - 6:50 am

STL

SYD

26h 48m

2 stops

9:15 am - 9:29 pm

SYD

STL

27h 14m

2 stops

$1,149Delta

Thu, Mar 19 - Wed, Mar 25

4:47 pm - 7:00 am

STL

SYD

22h 13m

1 stop

11:50 am - 4:05 pm

SYD

STL

20h 15m

1 stop

$1,185United Airlines

Thu, May 7 - Mon, May 25

8:50 am - 6:55 am

PIA

SYD

31h 05m

2 stops

9:30 am - 4:58 pm

SYD

PIA

22h 28m

2 stops

$1,226United Airlines

Mon, Apr 6 - Mon, Apr 13

4:20 pm - 7:05 am

EVV

SYD

23h 45m

2 stops

8:45 am - 11:10 pm

SYD

EVV

29h 25m

2 stops

$1,367American Airlines

Mon, Apr 6 - Mon, Apr 13

3:50 pm - 6:55 am

EVV

SYD

24h 05m

1 stop

8:45 am - 11:10 pm

SYD

EVV

29h 25m

2 stops

$1,370American Airlines

Wed, Aug 5 - Sun, Aug 30

2:00 pm - 6:50 am

MDW

SYD

25h 50m

2 stops

9:15 am - 6:31 pm

SYD

MDW

24h 16m

2 stops

$1,475Delta

Useful Info

Low season	January
High season	December
Cheapest flight	$454

Best time to beat the crowds but there is an average 10% increase 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

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Sydney (SYD)

SYD

$454 Find Cheap Flights from Illinois to Sydney

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

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