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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$447 CHEAP FLIGHTS from Illinois to Sydney

SYD

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Cheap Flights from Illinois to Sydney

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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

Wed, Aug 6 - Fri, Aug 22

6:40 am - 10:10 pmORD-SYD

48h 30m2 stops

1:15 pm - 5:40 amSYD-ORD

31h 25m2 stops

$881

Find Deal

Tue, Aug 12 - Tue, Aug 26

6:40 am - 11:45 amORD-SYD

38h 05m2 stops

1:15 pm - 5:40 amSYD-ORD

31h 25m2 stops

$900

Find Deal

Fri, Aug 15 - Fri, Aug 22

6:45 am - 7:00 amPIA-SYD

33h 15m2 stops

10:20 am - 10:13 amSYD-PIA

38h 53m2 stops

$955United Airlines

Find Deal

Sun, Aug 24 - Sat, Sep 6

7:00 am - 7:05 amORD-SYD

33h 05m2 stops

9:10 am - 12:04 amSYD-ORD

29h 54m2 stops

$1,001Alaska Airlines

Find Deal

Thu, Aug 21 - Mon, Aug 25

3:55 pm - 7:00 amPIA-SYD

24h 05m2 stops

9:30 am - 9:12 pmSYD-PIA

26h 42m2 stops

$1,116United Airlines

Find Deal

Wed, Sep 10 - Wed, Sep 24

10:00 am - 7:30 amORD-SYD

30h 30m2 stops

5:45 pm - 7:03 amSYD-ORD

28h 18m2 stops

$1,117Alaska Airlines

Find Deal

Sat, Sep 27 - Sun, Oct 12

8:05 pm - 7:15 pmORD-SYD

32h 10m2 stops

12:50 pm - 8:40 amSYD-ORD

35h 50m1 stop

$1,137ANA

Find Deal

Tue, Oct 14 - Mon, Nov 10

5:45 pm - 8:15 pmORD-SYD

34h 30m1 stop

12:25 pm - 5:16 amSYD-ORD

33h 51m2 stops

$1,142ANA

Find Deal

Wed, Nov 5 - Sun, Nov 23

6:15 am - 6:45 pmSTL-SYD

43h 30m2 stops

2:20 pm - 6:17 pmSYD-STL

20h 57m1 stop

$1,144Qantas Airways

Find Deal

Wed, Nov 5 - Sun, Nov 23

6:15 am - 6:45 pmSTL-SYD

43h 30m2 stops

2:20 pm - 4:09 pmSYD-STL

18h 49m1 stop

$1,145Qantas Airways

Find Deal

Useful Info

Low season	May
High season	December
Cheapest flight	$447

Best time to beat the crowds with an average 11% drop in price.

Most popular time to fly with an average 36% 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.

Katoomba

Cronulla

Lithgow

Randwick

Everything you need to know for your flight to Sydney

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Sydney

Sydney (SYD)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

SYD

$447 Find Cheap Flights from Illinois to Sydney

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

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

Good to know

FAQs for booking flights from Illinois 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.

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

Find direct flights for Sydney

Flights to other popular destinations

Flights from domestic origins to Sydney

Choose which airport to fly into in Sydney

Find deals for your return flight