Find flights
When to book
FAQs

Cheap flights from Illinois to Perth from $828

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 31/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
11 Mar — 18 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 February 2026.

Sun 11/1015:40
ORD
-
PER
2 stops34h 05m
Multiple Airlines
Sat 17/1023:05
PER
-
ORD
2 stops28h 43m
Multiple Airlines
Deal found 8/2$2,045
Mon 20/415:40
ORD
-
PER
2 stops40h 50m
Air Canada
Mon 11/522:40
PER
-
ORD
2 stops34h 18m
Air Canada
Deal found 7/2$2,047
Mon 9/315:35
ORD
-
PER
2 stops39h 45m
Air Canada
Mon 16/315:15
PER
-
ORD
2 stops36h 26m
Air Canada
Deal found 8/2$2,054
Sun 8/315:35
ORD
-
PER
2 stops34h 55m
Air Canada
Sat 14/316:45
PER
-
ORD
2 stops34h 56m
Air Canada
Deal found 8/2$2,056
Sat 10/1014:15
ORD
-
PER
3 stops35h 30m
Multiple Airlines
Sun 1/1122:30
PER
-
ORD
2 stops30h 11m
Multiple Airlines
Deal found 7/2$2,114
Mon 12/1015:40
ORD
-
PER
2 stops39h 50m
Air Canada
Fri 23/1022:55
PER
-
ORD
2 stops28h 53m
Air Canada
Deal found 8/2$2,206
Wed 10/613:26
STL
-
PER
2 stops32h 49m
American Airlines
Thu 18/623:55
PER
-
STL
2 stops34h 39m
American Airlines
Deal found 7/2$2,445
Thu 5/318:50
STL
-
PER
2 stops36h 25m
Qantas Airways
Mon 9/322:40
PER
-
STL
2 stops31h 33m
Qantas Airways
Deal found 8/2$2,619
Wed 10/614:11
STL
-
PER
3 stops32h 04m
Qantas Airways
Thu 18/623:55
PER
-
STL
2 stops37h 04m
Qantas Airways
Deal found 7/2$2,771
Wed 10/610:23
STL
-
PER
3 stops40h 37m
Multiple Airlines
Thu 18/623:50
PER
-
STL
3 stops45h 47m
Multiple Airlines
Deal found 7/2$2,983
Thu 5/316:05
STL
-
PER
3 stops56h 25m
Air Canada
Mon 9/322:55
PER
-
STL
3 stops53h 34m
Air Canada
Deal found 8/2$5,824
Tue 24/316:13
STL
-
PER
2 stops31h 12m
Qantas Airways
Tue 31/323:45
PER
-
STL
2 stops37h 13m
Qantas Airways
Deal found 7/2$9,516

Find flight deals from Illinois to Perth

Keep the following information in mind while searching for Illinois to Perth flight deals. Data was last updated 9 February 2026.

Round-trip from

$2,047

One-way from

$828

Popular in

September

Cheapest in

October

Average price

$2,298
Air Canada
  • Air Canada
  • 20/4-11/5
  • 4 total stops
  • 75h 08m total
  • Illinois to Perth
Search Deals
31/7
  • 31/7
  • 3 total stops
  • 54h 45m total
  • Illinois to Perth
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($206 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($138 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 9 February 2026.
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

Mon 9/3

15:35-20:20

2 stops39h 45m

Perth

Mon 16/3

15:15-14:41

2 stops36h 26m

$2,054

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 8/3

15:35-15:30

2 stops34h 55m

Perth

Sat 14/3

16:45-14:41

2 stops34h 56m

$2,056

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 20/4

15:40-21:30

2 stops40h 50m

Perth

Mon 11/5

23:55-22:01

3 stops35h 06m

$2,066

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 18/4

15:40-23:55

2 stops43h 15m

Perth

Sat 25/4

23:30-19:58

2 stops33h 28m

$2,217

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Tue 24/3

12:20-22:55

2 stops45h 35m

Perth

Mon 30/3

00:10-13:55

1 stop26h 45m

$2,280

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 8/3

13:55-15:30

3 stops36h 35m

Perth

Sat 14/3

15:15-22:04

3 stops43h 49m

$2,282

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Thu 28/5

15:40-14:55

2 stops34h 15m

Perth

Thu 11/6

00:50-14:45

2 stops26h 55m

$2,301

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 23/3

16:49-12:25

2 stops30h 36m

Perth

Mon 30/3

23:45-18:40

2 stops31h 55m

$2,376

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 20/4

16:15-06:50

1 stop25h 35m

Perth

Sun 10/5

00:10-19:52

2 stops32h 42m

$2,382

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 25/3

15:35-06:55

1 stop26h 20m

Perth

Tue 31/3

00:10-18:26

2 stops31h 16m

$2,394

Flights are sorted by cheapest return flights first.

Deals found on 6/2

Showing 1-10 of 23 results
1
2
3

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, August is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,802). Flying from Illinois to Perth in April is currently the most expensive (average of $2,366). 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 32h 49m. Fly via Air Canada, American Airlines, or Qantas Airways to get the fastest option. Illinois and Perth are separated by a distance of 17506 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, August is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,802). Flying from Illinois to Perth in April is currently the most expensive (average of $2,366). 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
Fremantle
Rottnest Island
Mandurah

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.