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Cheap flights from Illinois to Perth from $859

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Perth

Keep the following information in mind while searching for Illinois to Perth flight deals. Data was last updated 4 November 2025.

Round-trip from

$2,081

One-way from

$859

Popular in

September

Cheapest in

February

Average price

$2,555
Air Canada
  • Air Canada
  • 30/1-21/2
  • 4 total stops
  • 77h 21m total
  • Illinois to Perth
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24/11
  • 24/11
  • 3 total stops
  • 54h 20m total
  • Illinois to Perth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($679 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($199 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Illinois to Perth

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Perth
Explore the most affordable flight options available from Illinois to Perth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2025.

Tue 11/1115:00ORD - PER
2 stops31h 25mAmerican Airlines
Tue 18/1108:00PER - ORD
2 stops29h 59mAmerican Airlines
Deal found 3/11$2,445
Thu 13/1107:00STL - PER
2 stops33h 55mCathay Pacific
Sun 16/1100:25PER - STL
2 stops36h 33mCathay Pacific
Deal found 3/11$2,524
Tue 11/1118:03ORD - PER
2 stops28h 22mQantas Airways
Tue 18/1122:55PER - ORD
2 stops31h 00mQantas Airways
Deal found 2/11$2,570
Mon 17/1118:03ORD - PER
2 stops33h 17mQantas Airways
Sat 22/1115:20PER - ORD
2 stops38h 48mQantas Airways
Deal found 3/11$2,605
Tue 11/1118:30ORD - PER
3 stops34h 15mMultiple Airlines
Tue 18/1105:15PER - ORD
3 stops40h 13mMultiple Airlines
Deal found 2/11$2,639
Mon 10/1114:35ORD - PER
1 stop42h 20mCathay Pacific
Sun 23/1108:30PER - ORD
1 stop42h 25mCathay Pacific
Deal found 2/11$2,672
Mon 10/1118:30ORD - PER
3 stops34h 15mMultiple Airlines
Sun 23/1105:15PER - ORD
3 stops39h 10mMultiple Airlines
Deal found 2/11$2,683
Fri 7/1114:35ORD - PER
1 stop42h 20mMultiple Airlines
Thu 13/1105:35PER - ORD
3 stops39h 53mMultiple Airlines
Deal found 3/11$2,700
Tue 11/1114:35ORD - PER
1 stop42h 20mCathay Pacific
Tue 18/1108:30PER - ORD
1 stop42h 25mCathay Pacific
Deal found 2/11$2,772
Thu 13/1115:59STL - PER
2 stops39h 16mQantas Airways
Mon 17/1117:45PER - STL
2 stops36h 42mQantas Airways
Deal found 3/11$2,778
Wed 12/1118:03ORD - PER
2 stops36h 17mQantas Airways
Fri 28/1115:20PER - ORD
2 stops40h 25mQantas Airways
Deal found 3/11$2,805
Thu 13/1116:05STL - PER
3 stops62h 15mAir Canada
Mon 17/1122:55PER - STL
3 stops54h 34mAir Canada
Deal found 1/11$5,927

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Perth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 4 November 2025.
Use the filters below to find and compare flights from Illinois to Perth that are best for you.

Fly from

Illinois

Fly to

Perth

Route

Depart

Return

Price

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 30/1

15:40-21:35

2 stops39h 55m

Perth

Sat 21/2

15:15-14:41

2 stops37h 26m

$2,081

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 28/1

15:40-21:35

2 stops39h 55m

Perth

Tue 17/2

16:45-14:41

2 stops35h 56m

$2,190

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 8/3

14:00-14:30

3 stops35h 30m

Perth

Sun 29/3

22:40-14:43

2 stops29h 03m

$2,697

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 8/3

14:10-23:55

2 stops44h 45m

Perth

Sat 28/3

02:10-08:45

2 stops43h 35m

$2,752

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 28/1

14:35-22:55

1 stop42h 20m

Perth

Mon 16/2

00:25-12:55

1 stop26h 30m

$2,776

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 28/1

15:10-22:55

2 stops41h 45m

Perth

Mon 16/2

00:25-12:55

1 stop26h 30m

$2,819

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Thu 13/11

21:22-19:55

3 stops56h 33m

$944

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 15/11

21:22-16:30

3 stops53h 08m

$975

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 10/11

21:22-19:35

3 stops56h 13m

$996

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 12/11

13:48-08:50

3 stops53h 02m

$998

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 17 results
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Best time to book a flight from Illinois to Perth

Have a flexible travel schedule? Discover the best time to fly to Perth from Illinois with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Perth

What is the cheapest month to book a flight from Illinois to Perth?

Currently, January is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,803). Flying from Illinois to Perth in June is currently the most expensive (average of $3,174). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Perth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Perth from Illinois?

    Perth (PER) is the airport you will fly into if you book a flight from Illinois to Perth. It is only a 10.2 km journey from Perth (PER) to Perth’s city centre.

  • How long is the flight from Illinois to Perth?

    There are many flights that can get you from Illinois to Perth in 39h 55m. Fly via Air Canada to get the fastest option. Illinois and Perth are separated by a distance of 17617 km.

  • Can I find deals for flights from Illinois to Perth that include hotel bookings?

    Yes. In addition to deals on Illinois to Perth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Perth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Perth.

  • Can I find deals for business class flights from Illinois to Perth?

    Yes. Cheapflights offers flight deals from Illinois to Perth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Perth?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,803). Flying from Illinois to Perth in June is currently the most expensive (average of $3,174). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Perth?

Book flights to Perth if you plan to visit one of these locations
Scarborough
Mandurah
Fremantle
Rottnest Island

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Perth?

When you search for this flight from Illinois to Perth, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Perth?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois to Perth for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois to Perth with no change fees?

Need flexible booking options for your flight to Perth from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Perth become cheaper?

Yes! Start tracking prices for Illinois to Perth flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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