$511 Find Cheap Flights from Illinois to Australia

1 adult
1 adult, Economy

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Useful Info
Useful Info

Good to know

Low seasonMay
High seasonDecember
Cheapest flight$511
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 30% 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 from Illinois to Australia 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 from Illinois to Australia with an airline and back 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 from Illinois to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Australia?

    Based on KAYAK data, the cheapest day to fly to Australia is Saturday where round-trip tickets can be as cheap as $935. On the other hand, the most expensive day to fly is Thursday, where round-trip prices are $1,415 on average.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally in the evening, when round-trip flights cost $1,185 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Australia is generally at night, which is peak travel time and where the average cost of a ticket is $1,417.

  • What is the cheapest month to fly from Illinois to Australia?

    The cheapest month for flights from Illinois to Australia is January, when tickets cost $1,380 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $2,176 and $2,157 respectively.

  • How far in advance should I book a flight from Illinois to Australia?

    To get a below average price on the flight from Illinois to Australia, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

  • How long is the flight to Australia?

    An average nonstop flight from Illinois to Australia takes 30h 58m, covering a distance of 9322 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Sydney (SYD) with an average flight time of 21h 21m.

  • What are the most popular destinations in Australia?

    Based on KAYAK flight searches, the most popular destination is Sydney (58% of total searches to Australia). The next most popular destinations are Melbourne (18%) and Brisbane (9%). Searches for flights to Perth (4%), to Adelaide (3%) and to Hobart (2%) are also popular.

Book cheap flights from Illinois to Australia

Recent round-trip flight deals

9/6Sat
3 stops
29h 24mORD-SYD
9/11Thu
2 stops
25h 16mSYD-ORD
$1,024
7/29Tue
1 stop
33h 25mORD-SYD
8/5Tue
1 stop
22h 47mSYD-ORD
$1,025
11/28Fri
2 stopsQantas Airways
47h 10mSTL-SYD
12/14Sun
1 stopQantas Airways
18h 47mSYD-STL
$1,077
10/20Mon
1 stopANA
34h 30mORD-SYD
11/5Wed
2 stopsANA
36h 32mSYD-ORD
$1,142
9/14Sun
2 stopsAir Canada
26h 50mSTL-SYD
9/27Sat
2 stopsAir Canada
29h 38mSYD-STL
$1,144
11/5Wed
2 stopsQantas Airways
43h 35mSTL-SYD
11/23Sun
1 stopQantas Airways
18h 49mSYD-STL
$1,149
11/28Fri
2 stopsAir Canada
48h 20mSTL-SYD
12/14Sun
2 stopsAir Canada
45h 06mSYD-STL
$1,172
8/12Tue
2 stopsFiji Airways
36h 50mORD-SYD
8/26Tue
2 stopsFiji Airways
22h 42mSYD-ORD
$1,175
10/20Mon
1 stopANA
34h 30mORD-SYD
11/5Wed
1 stopANA
26h 35mSYD-ORD
$1,178
9/9Tue
2 stopsFiji Airways
26h 15mORD-SYD
9/23Tue
2 stopsFiji Airways
23h 10mSYD-ORD
$1,227

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Recent one-way flight deals

8/13Wed
2 stops
52h 22mORD-SYD
$511
8/7Thu
3 stops
34h 37mORD-SYD
$512
10/11Sat
2 stopsAir Canada
26h 40mSTL-SYD
$626
10/11Sat
3 stopsAir Canada
50h 50mSTL-SYD
$629
8/11Mon
2 stopsFiji Airways
25h 42mORD-SYD
$648
6/21Sat
2 stopsFiji Airways
25h 30mORD-SYD
$662
9/1Mon
1 stopANA
24h 40mORD-SYD
$691
9/1Mon
2 stopsANA
31h 55mORD-SYD
$695
10/11Sat
1 stopQantas Airways
33h 05mSTL-SYD
$710
9/30Tue
1 stopQantas Airways
21h 59mORD-MEL
$801

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Last minute flights from Illinois to Australia

Last minute flight, train and bus deals

6/20Fri
multi-stopQantas Airways
33h 37mSTL-SYD
7/11Fri
multi-stopQantas Airways
20h 45mSYD-STL
$1,281
6/20Fri
multi-stopAmerican Airlines
27h 37mSTL-SYD
7/11Fri
multi-stopAmerican Airlines
24h 23mSYD-STL
$1,348
6/20Fri
multi-stop
44h 41mORD-SYD
7/4Fri
multi-stop
40h 58mSYD-ORD
$1,477
6/20Fri
multi-stop
49h 05mORD-MEL
8/31Sun
multi-stop
23h 29mMEL-ORD
$1,499
6/18Wed
multi-stopUnited Airlines
20h 45mSTL-SYD
6/20Fri
multi-stopUnited Airlines
22h 40mSYD-STL
$1,540
6/18Wed
multi-stopUnited Airlines
26h 13mSTL-SYD
6/20Fri
multi-stopUnited Airlines
28h 39mSYD-STL
$1,544
6/18Wed
multi-stopDelta
30h 35mORD-SYD
7/9Wed
multi-stopDelta
27h 43mSYD-ORD
$1,769
6/20Fri
multi-stopDelta
26h 26mMDW-SYD
7/4Fri
multi-stopDelta
23h 15mSYD-MDW
$1,869
6/18Wed
multi-stopAir Canada
31h 35mORD-SYD
7/9Wed
multi-stopAir Canada
42h 41mSYD-ORD
$1,924
6/20Fri
multi-stopAir Canada
50h 50mSTL-SYD
7/11Fri
multi-stopAir Canada
26h 30mSYD-STL
$2,037

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Everything you need to know for your flight to Australia

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Australia
Business Class flights to Australia
Prem Econ Class flights to Australia
Economy Class flights to Australia

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