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.

$741 CHEAP FLIGHTS from Illinois to Sydney

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Flight Deals

Cheap Flights from Illinois to Sydney

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Recent return flight deals from Illinois to Sydney

Mon, 16 Nov - Mon, 30 Nov

15:30 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 05m1 stop Vancouver Intl

11:20 - 14:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 17m1 stop Vancouver Intl

$1,666Air Canada

Mon, 16 Nov - Mon, 30 Nov

15:30 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 05m1 stop Vancouver Intl

11:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,669Air Canada

Wed, 4 Nov - Mon, 16 Nov

08:49 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 46m1 stop Vancouver Intl

11:20 - 19:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 39m1 stop Vancouver Intl

$1,669Air Canada

Mon, 16 Nov - Mon, 30 Nov

13:55 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,672Air Canada

Wed, 4 Nov - Mon, 16 Nov

13:55 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 14:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 17m1 stop Vancouver Intl

$1,672Air Canada

Wed, 4 Nov - Mon, 16 Nov

13:55 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 - 19:52SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 32m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,675Air Canada

Sat, 31 Oct - Mon, 9 Nov

06:30 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 05m3 stops Denver Intl Los Angeles Auckland Intl

11:50 - 05:13SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

34h 23m3 stops Auckland Intl Los Angeles Las Vegas Harry Reid Intl

$1,676Multiple Airlines

Mon, 16 Nov - Thu, 10 Dec

06:30 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 05m3 stops Denver Intl Los Angeles Auckland Intl

11:50 - 11:46SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

40h 56m3 stops Auckland Intl Los Angeles Las Vegas Harry Reid Intl

$1,680Multiple Airlines

Wed, 3 Feb - Wed, 24 Feb

17:18 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 47m2 stops Dallas/Fort Worth Brisbane

14:05 - 18:11SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 06m1 stop Dallas/Fort Worth

$1,771Qantas Airways

Sat, 6 Feb - Sat, 20 Feb

17:18 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 47m2 stops Dallas/Fort Worth Brisbane

14:05 - 18:11SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 06m1 stop Dallas/Fort Worth

$1,771Qantas Airways

Recent last minute flight deals from Illinois to Sydney

Sun, 13 Sep - Sun, 27 Sep

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 14:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 23m1 stop Vancouver Intl

$1,730Air Canada

Mon, 14 Sep - Mon, 21 Sep

06:30 - 11:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

38h 20m3 stops Denver Intl Los Angeles Nadi

13:15 - 11:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

37h 36m3 stops Nadi Los Angeles Atlanta Hartsfield-Jackson

$1,754Multiple Airlines

Mon, 14 Sep - Wed, 23 Sep

10:26 - 11:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 24m3 stops Atlanta Hartsfield-Jackson Los Angeles Nadi

06:15 - 09:20SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

42h 05m3 stops Nadi Los Angeles Atlanta Hartsfield-Jackson

$1,754Multiple Airlines

Sat, 12 Sep - Sun, 15 Nov

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 45m2 stops Los Angeles Auckland Intl

14:05 - 00:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 54m2 stops Auckland Intl Los Angeles

$1,789Air New Zealand

Sun, 13 Sep - Mon, 16 Nov

07:40 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 05m2 stops San Francisco Auckland Intl

11:50 - 20:37SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 47m2 stops Auckland Intl Los Angeles

$1,789Air New Zealand

Sat, 12 Sep - Tue, 17 Nov

13:58 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

27h 47m2 stops Los Angeles Auckland Intl

11:50 - 20:35SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 45m2 stops Auckland Intl Los Angeles

$1,789Air New Zealand

Sun, 13 Sep - Sun, 27 Sep

15:40 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

09:20 - 20:12SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 52m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,797Air Canada

Sun, 13 Sep - Mon, 16 Nov

05:55 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 25m2 stops Denver Intl Vancouver Intl

11:20 - 19:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 39m1 stop Vancouver Intl

$1,811Air Canada

Mon, 14 Sep - Wed, 23 Sep

19:03 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 02m1 stop Los Angeles

12:00 - 18:25SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 25m1 stop Dallas/Fort Worth

$2,224Qantas Airways

Tue, 15 Sep - Thu, 17 Sep

17:50 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 15m1 stop Los Angeles

09:10 - 16:49SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 39m1 stop Los Angeles

$3,181Qantas Airways

Useful Info

Low season	September
High season	December
Cheapest flight	$741

Best time to beat the crowds but there is an average 9% increase in price.

Most popular time to fly (10% 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

Leura

Katoomba

Terrigal

Penrith

Manly

Cronulla

Coogee

Randwick

Lithgow

Bondi Beach

Swansea

Charlestown

Newport

Brooklyn

More options for your flight to Sydney

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Return flight

Complete your trip to Sydney with a hotel stay or car hire

$741 Find Cheap Flights from Illinois to Sydney – Compare and Save

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

Low season

High season

Cheapest flight

FAQs for booking flights from Illinois to Sydney

Travelling to a place near Sydney?

More options for your flight to Sydney

Complete your trip to Sydney with a hotel stay or car hire

Information on the airport you'll fly into in Sydney

Cabin class types available on flights to Illinois

Flights from domestic origins to Sydney

Flights to other popular destinations

Find deals for your return flight