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>

$717 CHEAP FLIGHTS from Illinois to Sydney

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

...and more

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41,299,237 searches in the past 7 days on KAYAK

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Cheapest return fare

$1,345

Typical prices: $1,207-$1,664

Qantas Airways

Tue 17/2Wed 4/3

ORD - SYD • 1 stop

Cheapest one-way flight

$717

Typical prices: $650-$1,204

Multiple Airlines

Wed 27/5

ORD - SYD • 2 stops

Start a new search

KAYAK searches hundreds 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

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

Tue, 17 Feb - Wed, 4 Mar

14:33 - 09:00

ORD

SYD

25h 27m

1 stop

07:05 - 14:53

SYD

ORD

24h 48m

2 stops

$1,345Qantas Airways

Mon, 9 Feb - Mon, 23 Feb

18:40 - 20:50

ORD

SYD

33h 10m

2 stops

11:20 - 17:46

SYD

ORD

23h 26m

1 stop

$1,376Qantas Airways

Tue, 28 Apr - Tue, 19 May

15:40 - 07:20

ORD

SYD

24h 40m

1 stop

07:00 - 14:45

SYD

ORD

22h 45m

2 stops

$1,392Multiple Airlines

Tue, 28 Apr - Tue, 19 May

09:50 - 07:20

ORD

SYD

30h 30m

2 stops

07:00 - 14:45

SYD

ORD

22h 45m

2 stops

$1,404Multiple Airlines

Fri, 10 Apr - Tue, 14 Apr

18:05 - 07:20

STL

SYD

46h 15m

2 stops

09:20 - 16:56

SYD

STL

46h 36m

2 stops

$1,698Air Canada

Sun, 5 Apr - Tue, 14 Apr

08:54 - 07:20

STL

SYD

31h 26m

2 stops

09:20 - 16:56

SYD

STL

46h 36m

2 stops

$1,709Air Canada

Sat, 11 Jul - Fri, 14 Aug

08:50 - 07:00

PIA

SYD

31h 10m

2 stops

09:30 - 20:46

SYD

PIA

26h 16m

2 stops

$1,889United Airlines

Wed, 25 Feb - Wed, 4 Mar

13:25 - 06:20

PIA

SYD

23h 55m

2 stops

12:10 - 21:26

SYD

PIA

26h 16m

2 stops

$1,976United Airlines

Tue, 24 Feb - Sun, 8 Mar

13:26 - 08:30

MDW

SYD

26h 04m

2 stops

10:40 - 16:22

SYD

MDW

22h 42m

2 stops

$1,979Delta

Sun, 22 Feb - Fri, 6 Mar

12:45 - 06:50

MDW

SYD

25h 05m

2 stops

10:40 - 17:37

SYD

MDW

23h 57m

2 stops

$2,050Delta

Useful Info

Low season	September
High season	March
Cheapest flight	$717

Best time to beat the crowds but there is an average 1% increase in price.

Most popular time to fly and prices are also 15% 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

Parramatta

Katoomba

Leura

Penrith

Terrigal

Manly

Cronulla

Coogee

Randwick

Bondi Beach

Lithgow

Charlestown

Newport

Swansea

Brooklyn

Everything you need to know for your flight to Sydney

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Return flight deals

Information on the airport you'll fly into in Sydney

Sydney (SYD)

$717 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 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