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>

$697 CHEAP FLIGHTS from Illinois to Sydney

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Cheap Flights from Illinois to Sydney

Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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 return flight deals from Illinois to Sydney

Wed, 2 Jul - Thu, 17 Jul

07:42 - 07:30ORD-SYD

32h 48m1 stop

17:45 - 06:03SYD-ORD

27h 18m2 stops

$1,604

Find Deal

Tue, 21 Oct - Sun, 2 Nov

06:00 - 07:30ORD-SYD

33h 30m2 stops

11:15 - 06:01SYD-ORD

34h 46m2 stops

$1,613

Find Deal

Fri, 28 Nov - Sun, 14 Dec

06:15 - 22:25STL-SYD

47h 10m2 stops

14:20 - 16:07SYD-STL

18h 47m1 stop

$1,653Qantas Airways

Find Deal

Sun, 14 Sep - Sat, 27 Sep

13:39 - 07:20STL-SYD

26h 41m2 stops

09:20 - 23:58SYD-STL

29h 38m2 stops

$1,825Air Canada

Find Deal

Fri, 28 Nov - Sun, 14 Dec

13:35 - 09:35STL-SYD

27h 00m2 stops

11:20 - 20:59SYD-STL

26h 39m2 stops

$1,865Air Canada

Find Deal

Tue, 2 Sep - Tue, 14 Oct

19:03 - 22:10ORD-SYD

36h 07m2 stops

14:15 - 21:02SYD-ORD

22h 47m2 stops

$1,894Fiji Airways

Find Deal

Tue, 12 Aug - Tue, 26 Aug

18:20 - 22:10ORD-SYD

36h 50m2 stops

13:15 - 20:57SYD-ORD

22h 42m2 stops

$1,896Fiji Airways

Find Deal

Wed, 22 Oct - Wed, 29 Oct

06:00 - 07:30ORD-SYD

33h 30m2 stops

17:25 - 05:01SYD-ORD

27h 36m2 stops

$1,922Alaska Airlines

Find Deal

Wed, 17 Sep - Tue, 23 Sep

06:20 - 07:30ORD-SYD

34h 10m2 stops

17:45 - 07:03SYD-ORD

28h 18m2 stops

$1,924Alaska Airlines

Find Deal

Tue, 29 Jul - Tue, 12 Aug

17:27 - 06:55STL-SYD

22h 28m1 stop

09:10 - 23:09SYD-STL

28h 59m1 stop

$1,950Qantas Airways

Find Deal

Useful Info

Low season	April
High season	March
Cheapest flight	$697

Best time to beat the crowds (17% less expensive on average)

Most popular time to fly and prices are also 14% lower 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

Katoomba

Parramatta

Terrigal

Penrith

Leura

Manly

Cronulla

Coogee

Bondi Beach

Randwick

Lithgow

Charlestown

Swansea

Newport

Brooklyn

Everything you need to know for your flight to Sydney

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Sydney

Sydney (SYD)

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.

$697 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