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 return 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>

$771 CHEAP FLIGHTS from Illinois 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 return flight deals from Illinois to Sydney

Mon, 14 Sep - Sun, 20 Sep

11:49 - 11:50

ORD

SYD

33h 01m

3 stops

13:15 - 10:48

SYD

ORD

36h 33m

3 stops

$1,648Multiple Airlines

Tue, 1 Sep - Tue, 8 Sep

17:45 - 09:25

ORD

SYD

24h 40m

1 stop

20:55 - 08:40

SYD

ORD

26h 45m

1 stop

$1,722ANA

Mon, 1 Jun - Wed, 10 Jun

19:23 - 06:55

STL

SYD

20h 32m

1 stop

10:20 - 18:17

SYD

STL

22h 57m

1 stop

$1,823United Airlines

Mon, 1 Jun - Wed, 10 Jun

19:23 - 06:55

STL

SYD

20h 32m

1 stop

10:20 - 18:17

SYD

STL

22h 57m

1 stop

$1,825United Airlines

Mon, 7 Sep - Mon, 14 Sep

06:00 - 09:20

STL

SYD

36h 20m

2 stops

12:00 - 18:14

SYD

STL

21h 14m

1 stop

$1,910Qantas Airways

Tue, 13 Oct - Fri, 13 Nov

06:30 - 10:55

STL

SYD

36h 25m

2 stops

14:05 - 16:40

SYD

STL

19h 35m

1 stop

$1,911Qantas Airways

Tue, 13 Oct - Wed, 18 Nov

12:10 - 08:20

STL

SYD

28h 10m

2 stops

11:20 - 15:30

SYD

STL

45h 10m

2 stops

$1,994Air Canada

Tue, 13 Oct - Fri, 13 Nov

12:10 - 08:20

STL

SYD

52h 10m

3 stops

11:20 - 15:30

SYD

STL

45h 10m

2 stops

$2,005Air Canada

Fri, 14 Aug - Sat, 29 Aug

17:01 - 06:55

EVV

SYD

22h 54m

1 stop

12:00 - 16:31

SYD

EVV

19h 31m

1 stop

$2,221American Airlines

Fri, 14 Aug - Sat, 29 Aug

17:01 - 06:55

EVV

SYD

22h 54m

1 stop

09:10 - 23:27

SYD

EVV

29h 17m

2 stops

$2,226American Airlines

Useful Info

Low season	September
High season	December
Cheapest flight	$771

Best time to beat the crowds (6% less expensive on average)

Most popular time to fly (8% more expensive on average)

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 return 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.

Wollongong

Parramatta

Katoomba

Leura

Terrigal

Penrith

Manly

Cronulla

Coogee

Randwick

Bondi Beach

Lithgow

Newport

Charlestown

Swansea

Brooklyn

Everything you need to know for your flight to Sydney

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Information on the airport you'll fly into in Sydney

Sydney (SYD)

$747 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 return 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 return 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.

Travelling 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 hire

Flights to other popular destinations

Flights from domestic origins to Sydney

Choose which airport to fly into in SydneySydney

Find deals for your return flight