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>

$515 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, May 16 - Mon, Jun 8

6:55 am - 11:50 am

ORD

SYD

37h 55m

3 stops

1:15 pm - 6:04 am

SYD

ORD

31h 49m

2 stops

$1,208Multiple Airlines

Tue, Sep 1 - Tue, Sep 8

5:45 pm - 9:25 am

ORD

SYD

24h 40m

1 stop

8:55 pm - 8:40 am

SYD

ORD

26h 45m

1 stop

$1,231ANA

Thu, Jun 4 - Fri, Jun 12

1:21 pm - 6:55 am

PIA

SYD

26h 34m

2 stops

9:30 am - 4:58 pm

SYD

PIA

22h 28m

2 stops

$1,293United Airlines

Mon, May 4 - Mon, May 18

7:06 pm - 6:55 am

STL

SYD

20h 49m

1 stop

10:20 am - 6:22 pm

SYD

STL

23h 02m

1 stop

$1,304United Airlines

Sun, May 17 - Sun, May 24

6:18 am - 6:50 am

EVV

SYD

33h 32m

2 stops

9:15 am - 9:44 pm

SYD

EVV

27h 29m

2 stops

$1,308Delta

Tue, Jun 23 - Tue, Jun 30

1:19 pm - 6:55 am

STL

SYD

26h 36m

1 stop

12:00 pm - 4:33 pm

SYD

STL

19h 33m

1 stop

$1,364Qantas Airways

Mon, Sep 7 - Mon, Sep 14

3:35 pm - 6:55 am

STL

SYD

24h 20m

1 stop

12:00 pm - 6:14 pm

SYD

STL

21h 14m

1 stop

$1,384Qantas Airways

Mon, May 4 - Mon, May 18

1:05 pm - 7:20 am

STL

SYD

51h 15m

3 stops

9:20 am - 8:25 pm

SYD

STL

26h 05m

2 stops

$1,390Air Canada

Tue, Jun 2 - Fri, Jun 19

2:15 pm - 7:20 am

STL

SYD

26h 05m

2 stops

9:20 am - 8:43 pm

SYD

STL

26h 23m

2 stops

$1,412Air Canada

Mon, Jun 29 - Mon, Jul 13

1:49 pm - 6:50 am

MDW

SYD

26h 01m

2 stops

9:15 am - 10:15 pm

SYD

MDW

28h 00m

2 stops

$1,422Delta

Useful Info

Low season	April
High season	December
Cheapest flight	$515

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

Most popular time to fly with an average 37% 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

$515 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