$699 Find Cheap Flights from Illinois to Australia

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Useful Info
Useful Info

Good to know

Low seasonApril
High seasonDecember
Cheapest flight$699
Best time to beat the crowds (15% less expensive on average)
Most popular time to fly (42% more expensive on average)
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 travellers 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 return 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 Friday when return tickets can be as cheap as $1,417. On the other hand, the most expensive day to fly is Thursday, when return prices are $3,787 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 $1,180 on average. Morning departures are around 100% cheaper than evening flights, on average. 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 $1,621.

  • 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 $2,125 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $3,351 and $3,322 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 direct flight from Illinois to Australia takes 31h 09m, covering a distance of 24155 km. 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 (52% of total searches to Australia). The next most popular destinations are Melbourne (20%) and Brisbane (10%). Searches for flights to Perth (5%), to Adelaide (3%), and to Hobart (2%) are also popular.

Book cheap flights from Illinois to Australia

Recent return flight deals

6/9Sat
3 stops
29h 24mORD-SYD
11/9Thu
2 stops
25h 16mSYD-ORD
$1,577
29/7Tue
1 stop
33h 25mORD-SYD
5/8Tue
1 stop
22h 47mSYD-ORD
$1,579
28/11Fri
2 stopsQantas Airways
47h 10mSTL-SYD
14/12Sun
1 stopQantas Airways
18h 47mSYD-STL
$1,659
5/11Wed
2 stopsQantas Airways
43h 35mSTL-SYD
23/11Sun
1 stopQantas Airways
18h 49mSYD-STL
$1,770
28/11Fri
2 stopsAir Canada
48h 20mSTL-SYD
14/12Sun
2 stopsAir Canada
45h 06mSYD-STL
$1,805
12/8Tue
2 stopsFiji Airways
36h 50mORD-SYD
26/8Tue
2 stopsFiji Airways
22h 42mSYD-ORD
$1,810
26/8Tue
1 stopANA
24h 40mORD-SYD
14/9Sun
1 stopANA
35h 50mSYD-ORD
$1,830
14/9Sun
2 stopsAir Canada
26h 41mSTL-SYD
27/9Sat
2 stopsAir Canada
29h 38mSYD-STL
$1,831
26/8Tue
2 stopsANA
31h 55mORD-SYD
14/9Sun
1 stopANA
35h 50mSYD-ORD
$1,837
9/9Tue
2 stopsFiji Airways
26h 15mORD-SYD
23/9Tue
2 stopsFiji Airways
23h 10mSYD-ORD
$1,890

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Recent one-way flight deals

26/8Tue
2 stops
34h 39mORD-SYD
$699
13/8Wed
2 stops
52h 22mORD-SYD
$787
11/10Sat
2 stopsAir Canada
26h 40mSTL-SYD
$964
11/10Sat
3 stopsAir Canada
50h 50mSTL-SYD
$969
11/8Mon
2 stopsFiji Airways
25h 42mORD-SYD
$998
11/8Mon
2 stopsAlaska Airlines
33h 30mORD-SYD
$1,038
1/9Mon
1 stopANA
24h 40mORD-SYD
$1,064
25/8Mon
2 stopsFiji Airways
25h 42mORD-SYD
$1,070
11/8Mon
1 stopANA
34h 30mORD-SYD
$1,103
27/8Wed
3 stopsAlaska Airlines
26h 23mORD-SYD
$1,155

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Last minute flights from Illinois to Australia

Last minute flight, train and bus deals

15/6Sun
multi-stopQantas Airways
33h 37mSTL-SYD
17/6Tue
multi-stopQantas Airways
28h 49mSYD-STL
$2,230
18/6Wed
multi-stop
32h 48mORD-SYD
20/6Fri
multi-stop
22h 19mSYD-ORD
$2,296
18/6Wed
multi-stopUnited Airlines
20h 45mSTL-SYD
25/6Wed
multi-stopUnited Airlines
22h 40mSYD-STL
$2,372
18/6Wed
multi-stopUnited Airlines
33h 25mSTL-SYD
25/6Wed
multi-stopUnited Airlines
22h 40mSYD-STL
$2,378
18/6Wed
multi-stopDelta
23h 53mSTL-SYD
25/6Wed
multi-stopDelta
30h 18mSYD-STL
$2,392
18/6Wed
multi-stopDelta
30h 35mORD-SYD
9/7Wed
multi-stopDelta
27h 43mSYD-ORD
$2,724
18/6Wed
multi-stopAir Canada
31h 35mORD-SYD
9/7Wed
multi-stopAir Canada
42h 41mSYD-ORD
$2,963
16/6Mon
multi-stopFiji Airways
26h 02mORD-MEL
20/6Fri
multi-stopFiji Airways
36h 19mMEL-ORD
$2,992
18/6Wed
multi-stopFiji Airways
26h 27mORD-MEL
20/6Fri
multi-stopFiji Airways
36h 19mMEL-ORD
$3,193
18/6Wed
multi-stopAir Canada
31h 40mORD-SYD
9/7Wed
multi-stopAir Canada
42h 41mSYD-ORD
$3,398

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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.

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