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.

$865 CHEAP FLIGHTS from Illinois to Sydney

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Cheap Flights from Illinois to Sydney

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Return

One-way

Last minute

Recent return flight deals from Illinois to Sydney

Sat, 14 Nov - Fri, 27 Nov

13:30 - 08:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 00m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:40 - 23:20SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

29h 40m2 stops Los Angeles Atlanta Hartsfield-Jackson

$1,854Delta

Sat, 14 Nov - Fri, 27 Nov

16:30 - 08:30ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 00m1 stop Los Angeles

10:40 - 20:17SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 37m2 stops Los Angeles Detroit Metropolitan Wayne County

$1,854Delta

Mon, 11 Jan - Sun, 24 Jan

10:05 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 30m1 stop Toronto Pearson Intl

11:20 - 20:04SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 44m1 stop Vancouver Intl

$1,863Air New Zealand

Sat, 3 Apr - Sun, 18 Apr

20:50 - 09:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

45h 55m2 stops Los Angeles Manila Ninoy Aquino Intl

11:35 - 17:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

45h 20m1 stop Manila Ninoy Aquino Intl

$1,872Multiple Airlines

Mon, 11 Jan - Sun, 24 Jan

08:45 - 09:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 50m1 stop Toronto Pearson Intl

11:20 - 17:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 23m2 stops Vancouver Intl Toronto Pearson Intl

$1,874Air New Zealand

Thu, 22 Apr - Sat, 8 May

17:25 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 40m2 stops Phoenix Sky Harbor Intl Los Angeles

10:20 - 16:44SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 24m1 stop Los Angeles

$1,874American Airlines

Thu, 22 Apr - Sat, 8 May

17:25 - 07:05ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 40m2 stops Phoenix Sky Harbor Intl Los Angeles

09:10 - 17:57SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 47m1 stop Los Angeles

$1,874American Airlines

Fri, 5 Mar - Tue, 9 Mar

22:45 - 09:50ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

42h 05m1 stop Manila Ninoy Aquino Intl

11:30 - 16:55SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

46h 25m1 stop Manila Ninoy Aquino Intl

$1,875Philippine Airlines

Sun, 3 Jan - Mon, 1 Feb

17:59 - 09:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

22h 01m1 stop Los Angeles

11:20 - 16:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 39m1 stop Los Angeles

$1,909Qantas Airways

Wed, 2 Dec - Thu, 24 Dec

13:30 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

23h 55m1 stop Los Angeles

14:05 - 19:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 54m1 stop Dallas/Fort Worth

$1,952Qantas Airways

Recent last minute flight deals from Illinois to Sydney

Tue, 3 Nov - Thu, 26 Nov

08:59 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 26m2 stops Dallas/Fort Worth Los Angeles

14:00 - 00:53SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 53m3 stops Nadi Los Angeles Denver Intl

$1,895Multiple Airlines

Tue, 3 Nov - Thu, 26 Nov

08:59 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 26m2 stops Dallas/Fort Worth Los Angeles

14:00 - 06:14SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

33h 14m2 stops Nadi Los Angeles

$1,915Multiple Airlines

Sun, 1 Nov - Mon, 16 Nov