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Cheap flights from Illinois to Perth from $933

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
27 Jun — 4 Jul1
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 28 May 2026.

Tue 25/815:21
ORD
-
PER
2 stops31h 44m
Qantas Airways
Sun 30/810:30
PER
-
ORD
2 stops31h 43m
Qantas Airways
Deal found 26/5$2,063
Tue 11/811:52
ORD
-
PER
2 stops34h 23m
Qantas Airways
Tue 18/823:45
PER
-
ORD
2 stops31h 02m
Qantas Airways
Deal found 26/5$2,096
Tue 30/618:20
ORD
-
PER
2 stops33h 40m
Qantas Airways
Thu 30/723:45
PER
-
ORD
2 stops36h 15m
Qantas Airways
Deal found 27/5$2,103
Fri 10/719:08
ORD
-
PER
2 stops32h 52m
Qantas Airways
Fri 17/710:30
PER
-
ORD
2 stops26h 37m
Qantas Airways
Deal found 26/5$2,123
Sat 22/816:00
ORD
-
PER
3 stops47h 20m
Multiple Airlines
Tue 1/905:35
PER
-
ORD
3 stops69h 45m
Multiple Airlines
Deal found 24/5$2,141
Wed 14/1016:15
ORD
-
PER
3 stops47h 05m
Multiple Airlines
Mon 26/1005:35
PER
-
ORD
3 stops45h 20m
Multiple Airlines
Deal found 23/5$2,151
Tue 6/1014:40
STL
-
PER
3 stops41h 00m
Air Canada
Mon 12/1022:55
PER
-
STL
3 stops34h 05m
Air Canada
Deal found 28/5$2,162
Fri 16/1015:14
ORD
-
PER
2 stops31h 01m
Qantas Airways
Sun 1/1111:35
PER
-
ORD
2 stops31h 51m
Qantas Airways
Deal found 26/5$2,194
Tue 6/1006:30
STL
-
PER
2 stops46h 40m
Qantas Airways
Mon 12/1010:30
PER
-
STL
2 stops25h 35m
Qantas Airways
Deal found 28/5$2,229
Mon 19/1019:16
ORD
-
PER
2 stops39h 39m
Multiple Airlines
Thu 29/1017:05
PER
-
ORD
2 stops43h 54m
Multiple Airlines
Deal found 24/5$2,233
Mon 29/618:59
ORD
-
PER
2 stops29h 36m
American Airlines
Mon 13/723:45
PER
-
ORD
2 stops29h 14m
American Airlines
Deal found 27/5$2,240
Wed 26/814:57
ORD
-
PER
2 stops32h 28m
Qantas Airways
Sun 30/823:45
PER
-
ORD
2 stops32h 57m
Qantas Airways
Deal found 26/5$2,243

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 28 May 2026.

Round-trip from

$2,063

One-way from

$933

Popular in

September

Cheapest in

October

Average price

$3,070
Qantas Airways
  • Qantas Airways
  • 25/8-30/8
  • 4 total stops
  • 63h 27m total
  • Illinois to Perth
Search Deals
18/8
  • 18/8
  • 3 total stops
  • 51h 58m total
  • Illinois to Perth
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($1,027 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($364 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 28 May 2026.
Use the filters below to find and compare flights from Illinois to Perth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 6/10

14:40-20:40

3 stops41h 00m

Perth

Mon 12/10

22:55-20:00

3 stops34h 05m

$2,162

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Tue 30/6

18:59-13:35

2 stops29h 36m

Perth

Thu 30/7

10:30-00:07

2 stops26h 37m

$2,263

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 20/11

11:45-12:25

2 stops34h 40m

Perth

Fri 11/12

13:25-16:07

2 stops40h 42m

$2,503

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 22/8

16:00-14:05

2 stops33h 05m

Perth

Mon 31/8

00:25-14:20

3 stops74h 55m

$2,531

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 22/8

19:20-18:35

1 stop34h 15m

Perth

Tue 1/9

13:45-15:05

2 stops38h 20m

$2,680

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 8/7

17:13-17:00

2 stops34h 47m

Perth

Wed 15/7

06:25-19:53

2 stops26h 28m

$2,723

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 6/10

14:40-13:55

3 stops34h 15m

Perth

Mon 12/10

15:00-20:00

3 stops42h 00m

$2,771

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 8/8

19:20-18:35

1 stop34h 15m

Perth

Tue 11/8

07:30-15:05

2 stops44h 35m

$2,800

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 19/9

06:00-18:35

2 stops47h 35m

Perth

Tue 22/9

22:45-20:44

2 stops34h 59m

$2,863

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 8/8

10:11-14:40

3 stops39h 29m

Perth

Mon 10/8

01:10-19:21

2 stops31h 11m

$2,874

Flights are sorted by cheapest return flights first.

Deals found on 26/5

Showing 1-10 of 24 resultsSorted by cheapest first
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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

How much does it cost for a return flight from Illinois to Perth?

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 29h 36m. Fly via Air Canada, Qantas Airways, or Qatar Airways to get the fastest option. Illinois and Perth are separated by a distance of 17617 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.

See more FAQs

Travelling to a place near Perth?

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

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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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