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 round-trip 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.

$522 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 round-trip flight deals from Illinois to Sydney

Sun, Oct 25 - Sat, Nov 7

11:30 am - 8:15 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

40h 45m1 stop Tokyo Narita

12:25 pm - 7:20 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

35h 55m1 stop Tokyo Haneda

$1,201ANA

Sun, Oct 25 - Sat, Nov 7

7:00 am - 8:15 pmORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

45h 15m2 stops Los Angeles Tokyo Haneda

12:25 pm - 7:20 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

35h 55m1 stop Tokyo Haneda

$1,205ANA

Tue, Dec 1 - Sun, Dec 13

3:00 pm - 8:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 35m2 stops Los Angeles Auckland Intl

11:50 am - 10:05 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 15m2 stops Auckland Intl Los Angeles

$1,238Air New Zealand

Mon, Jan 11 - Sun, Jan 24

12:45 pm - 10:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 50m2 stops Los Angeles Auckland Intl

11:50 am - 10:00 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 10m2 stops Auckland Intl Los Angeles

$1,238Air New Zealand

Sun, Oct 18 - Sun, Nov 1

8:45 am - 8:20 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 35m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

11:20 am - 3:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 17m1 stop Vancouver Intl

$1,267Air Canada

Sun, Oct 18 - Sun, Nov 1

3:40 pm - 8:20 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

24h 40m1 stop Vancouver Intl

11:20 am - 3:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 17m1 stop Vancouver Intl

$1,267Air Canada

Tue, Feb 2 - Sat, Feb 27

5:18 pm - 11:05 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 47m2 stops Dallas/Fort Worth Brisbane

2:05 pm - 6:11 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 06m1 stop Dallas/Fort Worth

$1,273Qantas Airways

Tue, Oct 13 - Wed, Oct 21

6:30 am - 7:30 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 00m2 stops Denver Intl Los Angeles

6:50 pm - 6:34 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

27h 44m1 stop Los Angeles

$1,287Multiple Airlines

Fri, Nov 20 - Sun, Nov 29

3:30 pm - 9:35 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

25h 05m1 stop Vancouver Intl

9:00 am - 2:37 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 37m2 stops Brisbane Vancouver Intl

$1,296Multiple Airlines

Sat, Feb 13 - Sat, Feb 27

7:01 pm - 9:30 pmSTL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 29m2 stops Dallas/Fort Worth Brisbane

2:05 pm - 6:11 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 06m1 stop Dallas/Fort Worth

$1,312Qantas Airways

Recent last minute flight deals from Illinois to Sydney

Sun, Sep 6 - Sun, Sep 20

8:49 am - 7:20 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 31m1 stop Vancouver Intl

9:20 am - 7:51 amSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

37h 31m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,307Air Canada

Mon, Sep 7 - Mon, Sep 14

3:40 pm - 10:40 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 00m2 stops Vancouver Intl Brisbane

9:20 am - 2:43 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 23m1 stop Vancouver Intl

$1,338Multiple Airlines

Mon, Sep 7 - Mon, Sep 14

5:55 am - 7:20 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

34h 25m2 stops Denver Intl Vancouver Intl

9:20 am - 8:00 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 40m2 stops Vancouver Intl Phoenix Sky Harbor Intl

$1,343Air Canada

Mon, Sep 7 - Mon, Sep 14

6:00 am - 8:40 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

35h 40m2 stops Los Angeles Hong Kong Intl

2:05 pm - 8:44 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 39m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,475Multiple Airlines

Mon, Sep 7 - Sun, Sep 27

6:15 am - 9:50 pmSTL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 35m2 stops Houston George Bush Intcntl Auckland Intl

10:20 am - 6:43 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 23m1 stop San Francisco

$1,636Air New Zealand

Mon, Sep 7 - Sun, Sep 13

3:40 pm - 10:40 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

28h 00m2 stops Vancouver Intl Brisbane

9:20 am - 2:43 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

20h 23m1 stop Vancouver Intl

$1,742Air New Zealand

Mon, Sep 7 - Sun, Sep 27

6:00 am - 7:05 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles

7:00 pm - 11:30 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 30m2 stops Melbourne Los Angeles

$1,872Qantas Airways

Mon, Sep 7 - Sun, Sep 27

8:42 am - 6:55 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 13m1 stop San Francisco

10:20 am - 6:43 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 23m1 stop San Francisco

$1,910United Airlines

Fri, Sep 4 - Sun, Sep 6

7:00 pm - 7:05 amORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

21h 05m1 stop Los Angeles

12:00 pm - 6:29 pmSYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

21h 29m1 stop Dallas/Fort Worth

$2,207Qantas Airways

Mon, Sep 7 - Mon, Sep 14

8:42 am - 6:55 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 13m1 stop San Francisco

10:20 am - 6:39 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 19m1 stop San Francisco

$2,261United Airlines

Useful Info

Low season	July
High season	December
Cheapest flight	$522

Best time to beat the crowds but there is an average 8% increase in price.

Most popular time to fly with an average 35% increase in price.

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 round-trip 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.

Parramatta

Terrigal

Penrith

Katoomba

Coogee

Cronulla

Randwick

Leura

Lithgow

Swansea

Charlestown

Brooklyn

Newport

Everything you need to know for your flight to Sydney

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Sydney (SYD)

SYD

$522 Find Cheap Flights from Illinois to Sydney - Compare and Save

Cheap Flights from Illinois to Sydney

Recent round-trip flight deals from Illinois to Sydney

Recent one-way flight deals from Illinois to Sydney

Recent last minute flight deals from Illinois to Sydney

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FAQs for booking flights from Illinois to Sydney

Traveling 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 rental

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Choose which airport to fly into in Sydney

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