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Find cheap flights from Illinois to Australia from $370

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Illinois to Australia departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 7/5
Fri 7/12

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Good to know

Low season

April

High season

December

Cheapest flight

$370
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 29% increase in price.
Flight from Chicago O'Hare Airport to Sydney

FAQs for booking flights from Illinois to Australia

  • How does KAYAK find such low prices on flights from Illinois to Australia?

    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 Australia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Australia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Australia 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 Australia?

    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 Australia 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 Australia?

    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 Australia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Illinois to Australia

Recent round-trip flight deals

8/13Tue
2 stopsAir New Zealand
25h 26mORD-BNE
8/20Tue
2 stopsAir New Zealand
23h 52mBNE-ORD
$1,192
8/13Tue
2 stopsAir New Zealand
25h 30mORD-SYD
8/27Tue
2 stopsAir New Zealand
29h 03mSYD-ORD
$1,203
11/11Mon
2 stopsAir Canada
29h 20mORD-SYD
12/24Tue
2 stopsAir Canada
37h 53mSYD-ORD
$1,241
10/28Mon
2 stopsAir Canada
29h 20mORD-SYD
11/18Mon
2 stopsAir Canada
37h 36mSYD-ORD
$1,242
8/1Thu
2 stops
30h 18mORD-SYD
8/6Tue
2 stops
31h 46mSYD-ORD
$1,260
8/1Thu
3 stops
32h 57mORD-SYD
8/6Tue
2 stops
31h 46mSYD-ORD
$1,266
9/2Mon
1 stopANA
24h 40mORD-SYD
9/14Sat
2 stopsANA
32h 43mSYD-ORD
$1,306
9/2Mon
2 stopsANA
45h 05mORD-SYD
9/14Sat
2 stopsANA
32h 43mSYD-ORD
$1,310
10/27Sun
1 stopUnited Airlines
21h 50mORD-SYD
12/3Tue
1 stopUnited Airlines
22h 18mSYD-ORD
$1,325
7/2Tue
2 stopsUnited Airlines
29h 15mORD-SYD
7/9Tue
1 stopUnited Airlines
27h 51mSYD-ORD
$1,330

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Recent one-way flight deals

8/13Tue
2 stops
50h 18mORD-SYD
$370
7/24Wed
2 stops
53h 20mORD-SYD
$481
11/3Sun
2 stopsIberia
37h 20mORD-MEL
$857
11/4Mon
2 stopsChina Southern
49h 22mORD-BNE
$903
11/4Mon
3 stopsChina Southern
47h 25mORD-BNE
$952
9/23Mon
1 stopANA
24h 40mORD-SYD
$955
9/17Tue
1 stopCathay Pacific
28h 10mORD-MEL
$957
8/6Tue
1 stopCathay Pacific
27h 45mORD-SYD
$994
10/15Tue
1 stopANA
24h 40mORD-SYD
$1,016
7/16Tue
2 stopsIberia
33h 10mORD-MEL
$1,179

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Last minute flights from Illinois to Australia

Last minute flight, train and bus deals

6/10Mon
multi-stop
24h 40mORD-SYD
6/29Sat
multi-stop
23h 21mSYD-ORD
$2,085
6/8Sat
multi-stopAir New Zealand
20h 20mORD-SYD
6/10Mon
multi-stopAir New Zealand
24h 10mSYD-ORD
$2,123
6/9Sun
multi-stopAir Canada
29h 20mSTL-SYD
6/16Sun
multi-stopAir Canada
25h 41mSYD-STL
$2,175
6/9Sun
multi-stopAir Canada
29h 20mSTL-SYD
6/16Sun
multi-stopAir Canada
25h 41mSYD-STL
$2,181
6/8Sat
multi-stopCathay Pacific
36h 02mORD-MEL
6/15Sat
multi-stopCathay Pacific
46h 00mMEL-ORD
$2,516
6/8Sat
multi-stopCathay Pacific
28h 10mORD-MEL
6/15Sat
multi-stopCathay Pacific
46h 00mMEL-ORD
$2,556
6/9Sun
multi-stopQantas Airways
33h 36mSTL-SYD
6/16Sun
multi-stopQantas Airways
28h 43mSYD-STL
$2,561
6/10Mon
multi-stopQantas Airways
33h 36mSTL-SYD
6/17Mon
multi-stopQantas Airways
28h 43mSYD-STL
$2,680
6/10Mon
multi-stopAmerican Airlines
25h 09mSTL-SYD
6/17Mon
multi-stopAmerican Airlines
28h 43mSYD-STL
$2,714
6/9Sun
multi-stopAmerican Airlines
25h 09mSTL-SYD
6/16Sun
multi-stopAmerican Airlines
28h 43mSYD-STL
$2,722

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