How long is the flight from Illinois to Perth?

There are many flights that can get you from Illinois to Perth in 29h 01m. Fly via Cathay Pacific, Qatar Airways, 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. Find deals

In terms of precipitation, rainfall in Perth ranges from 0.0 - 170.0 inches per month. June is typically the wettest month, when rainfall can reach 170.0 mm. January is typically the driest time to visit Perth when rainfall is around 0.0 mm. Find deals

If weather is an important factor for your trip to Perth, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 24.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 12.0 C). Find deals

What is the cheapest time of day to fly from IL to PER?

When flying from Illinois to Perth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

$786+ Flights from Illinois to Perth

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 23 December 2025.

Sat 27/1214:35ORD - PER

1 stop42h 20mCathay Pacific

Sun 11/108:30PER - ORD

1 stop42h 25mCathay Pacific

Deal found 21/12$2,966

Sat 27/1218:50ORD - PER

1 stop27h 05mQatar Airways

Sun 11/123:45PER - ORD

2 stops52h 45mQatar Airways

Deal found 21/12$3,807

Sat 27/1219:22ORD - PER

2 stops31h 58mQantas Airways

Sun 11/122:45PER - ORD

2 stops32h 04mQantas Airways

Deal found 22/12$3,856

Sat 27/1213:13ORD - PER

3 stops35h 17mAir Canada

Sun 11/122:30PER - ORD

2 stops30h 11mAir Canada

Deal found 22/12$5,182

Sat 27/1217:20ORD - PER

2 stops40h 35mKLM

Sun 11/106:50PER - ORD

3 stops45h 30mKLM

Deal found 21/12$5,479

Best flights from Illinois to Perth
Discover carefully curated flight deals from Illinois to Perth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 December 2025.

Tue 10/309:35STL - PER

2 stops48h 20mCathay Pacific

Mon 23/300:25PER - STL

2 stops36h 34mCathay Pacific

Deal found 21/12$2,037

Tue 10/318:08STL - PER

2 stops39h 47mMultiple Airlines

Mon 23/300:25PER - STL

2 stops36h 34mMultiple Airlines

Deal found 22/12$2,087

Thu 30/407:00STL - PER

2 stops39h 55mQatar Airways

Fri 8/522:45PER - STL

2 stops38h 10mQatar Airways

Deal found 21/12$2,174

Wed 4/217:04STL - PER

2 stops29h 01mQantas Airways

Wed 11/210:20PER - STL

2 stops27h 39mQantas Airways

Deal found 20/12$2,215

Tue 10/213:00ORD - PER

2 stops37h 50mAir New Zealand

Tue 17/218:50PER - ORD

2 stops42h 14mAir New Zealand

Deal found 20/12$2,341

Wed 4/209:40ORD - PER

3 stops48h 15mSingapore Airlines

Wed 11/213:50PER - ORD

3 stops47h 31mSingapore Airlines

Deal found 21/12$2,505

Tue 10/215:35ORD - PER

2 stops34h 20mAir Canada

Tue 17/222:55PER - ORD

3 stops34h 50mAir Canada

Deal found 20/12$2,534

Sat 14/317:29ORD - PER

2 stops46h 56mMultiple Airlines

Sat 21/313:50PER - ORD

2 stops47h 08mMultiple Airlines

Deal found 20/12$2,093

Mon 23/319:24ORD - PER

2 stops45h 01mMultiple Airlines

Mon 30/313:45PER - ORD

2 stops41h 41mMultiple Airlines

Deal found 22/12$2,139

Wed 11/306:38STL - PER

2 stops40h 27mQantas Airways

Sat 18/406:20PER - STL

2 stops24h 57mQantas Airways

Deal found 21/12$2,395

Sun 3/515:40ORD - PER

2 stops35h 05mAir Canada

Wed 20/522:40PER - ORD

2 stops29h 05mAir Canada

Deal found 21/12$2,577

Thu 19/210:04STL - PER

2 stops46h 51mCathay Pacific

Mon 23/208:30PER - STL

2 stops53h 18mCathay Pacific

Deal found 20/12$2,830

Wed 4/209:40ORD - PER

3 stops48h 15mMultiple Airlines

Wed 11/217:05PER - ORD

2 stops37h 28mMultiple Airlines

Deal found 21/12$2,436

Tue 10/306:51STL - PER

2 stops44h 59mAir New Zealand

Tue 24/322:55PER - STL

3 stops32h 04mAir New Zealand

Deal found 22/12$2,952

Thu 5/209:40ORD - PER

3 stops48h 15mMultiple Airlines

Thu 12/217:05PER - ORD

2 stops44h 51mMultiple Airlines

Deal found 22/12$2,555

Fri 13/215:35ORD - PER

2 stops40h 40mMultiple Airlines

Mon 16/223:10PER - ORD

2 stops29h 31mMultiple Airlines

Deal found 19/12$2,573

Wed 4/208:45STL - PER

3 stops42h 05mMultiple Airlines

Wed 11/218:50PER - STL

3 stops42h 09mMultiple Airlines

Deal found 20/12$2,919

Thu 30/416:05STL - PER

3 stops57h 50mMultiple Airlines

Fri 8/523:45PER - STL

2 stops31h 32mMultiple Airlines

Deal found 21/12$2,946

Last-minute flights from Illinois to Perth
Discover last-minute flight deals from Illinois to Perth. Data last updated 23 December 2025 and is based on user searches.

Sat 27/1214:35ORD - PER

1 stop42h 20mCathay Pacific

Sun 11/108:30PER - ORD

1 stop42h 25mCathay Pacific

Deal found 21/12$2,966

Sat 27/1218:50ORD - PER

1 stop27h 05mQatar Airways

Sun 11/123:45PER - ORD

2 stops52h 45mQatar Airways

Deal found 21/12$3,807

Sat 27/1219:22ORD - PER

2 stops31h 58mQantas Airways

Sun 11/122:45PER - ORD

2 stops32h 04mQantas Airways

Deal found 22/12$3,856

Sat 27/1213:13ORD - PER

3 stops35h 17mAir Canada

Sun 11/122:30PER - ORD

2 stops30h 11mAir Canada

Deal found 22/12$5,182

Sat 27/1217:20ORD - PER

2 stops40h 35mKLM

Sun 11/106:50PER - ORD

3 stops45h 30mKLM

Deal found 20/12$5,479

One-way flights from Illinois to Perth
Search for one-way flight options from Illinois to Perth. Find affordable one-way fares based on user searches. Data last updated 23 December 2025.

Wed 4/213:30ORD - PER

2 stops49h 10mMultiple Airlines

Deal found 20/12$786

Fri 6/213:30ORD - PER

2 stops49h 10mMultiple Airlines

Deal found 20/12$833

Sun 1/213:30ORD - PER

2 stops42h 15mMultiple Airlines

Deal found 20/12$836

Mon 2/213:30ORD - PER

3 stops40h 15mMultiple Airlines

Deal found 20/12$897

Wed 4/307:00STL - PER

3 stops55h 30mMultiple Airlines

Deal found 22/12$929

Tue 3/214:35ORD - PER

2 stops41h 10mMultiple Airlines

Deal found 20/12$939

Thu 5/213:10ORD - PER

3 stops49h 20mMultiple Airlines

Deal found 20/12$942

Sat 31/115:35ORD - PER

3 stops53h 15mMultiple Airlines

Deal found 20/12$947

Find flight deals from Illinois to Perth

Round-trip from	$2,037
One-way from	$786
Popular in	September
Cheapest in	February
Average price	$3,381

Cathay Pacific
10/3-23/3
4 total stops
84h 54m total
Illinois to Perth

Search Deals

4/2
2 total stops
49h 10m total
Illinois to Perth

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($652 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($191 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 10/3

09:35-22:55

2 stops48h 20m

Perth

Mon 23/3

00:25-23:59

2 stops36h 34m

$2,037

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 10/3

18:08-22:55

2 stops39h 47m

Perth

Mon 23/3

00:25-23:59

2 stops36h 34m

$2,087

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 14/3

17:29-05:25

2 stops46h 56m

Perth

Sat 21/3

13:50-23:58

2 stops47h 08m

$2,093

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 23/3

19:24-05:25

2 stops45h 01m

Perth

Mon 30/3

13:45-18:26

2 stops41h 41m

$2,139

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 30/4

07:00-11:55

2 stops39h 55m

Perth

Fri 8/5

22:45-23:55

2 stops38h 10m

$2,174

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 4/2

17:04-12:05

2 stops29h 01m

Perth

Wed 11/2

10:20-23:59

2 stops27h 39m

$2,215

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Tue 10/2

13:00-16:50

2 stops37h 50m

Perth

Tue 17/2

18:50-23:04

2 stops42h 14m

$2,341

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 11/3

06:38-12:05

2 stops40h 27m

Perth

Sat 18/4

06:20-18:17

2 stops24h 57m

$2,395

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 4/2

09:40-23:55

3 stops48h 15m

Perth

Wed 11/2

17:05-16:33

2 stops37h 28m

$2,436

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 4/2

09:40-23:55

3 stops48h 15m

Perth

Wed 11/2

13:50-23:21

3 stops47h 31m

$2,505

Flights are sorted by cheapest return flights first.

Deals found on 20/12

Showing 1-10 of 28 results

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, May is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,853). Flying from Illinois to Perth in July is currently the most expensive (average of $2,431). 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

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 01m. Fly via Cathay Pacific, Qatar Airways, 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, May is the cheapest month in which you can book a flight from Illinois to Perth (average of $1,853). Flying from Illinois to Perth in July is currently the most expensive (average of $2,431). 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

Scarborough

Mandurah

Fremantle

Rottnest Island

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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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Cheap flights from Illinois to Perth from $786

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Perth

Cheapest flights from Illinois to PerthExplore 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 23 December 2025.

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 23 December 2025.

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 23 December 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Perth that are best for you.

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.

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?

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?

How long is the flight from Illinois to Perth?

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

How can I find direct flights from Illinois to Perth?

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

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

Travelling to a place near Perth?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Perth

See prices for flight routes from nearby airports that may be better suited for you.

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?

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

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

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

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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 23 December 2025.