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Cheap flights from Illinois to Perth from $1,142

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
20 Jul — 27 Jul1
1 adult

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 15 July 2025.

Round-trip from

$1,505

One-way from

$1,142

Popular in

September

Cheapest in

February

Average price

$3,197
18/8-3/9
  • 18/8-3/9
  • 4 total stops
  • 101h 30m total
  • Illinois to Perth
Search Deals
1/8
  • 1/8
  • 3 total stops
  • 45h 30m total
  • Illinois to Perth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($659 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($180 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Illinois to Perth

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 15 July 2025.

Mon 18/816:00ORD - PER
2 stops44h 40mMultiple Airlines
Wed 3/918:35PER - ORD
2 stops56h 50mMultiple Airlines
Deal found 13/7$1,505
Wed 3/919:20ORD - PER
1 stop27h 35mQatar Airways
Tue 9/922:45PER - ORD
1 stop29h 20mQatar Airways
Deal found 14/7$2,028
Fri 29/806:00STL - PER
2 stops40h 55mQatar Airways
Fri 5/915:40PER - STL
2 stops62h 54mQatar Airways
Deal found 14/7$2,271
Wed 27/816:00ORD - PER
1 stop26h 45mCathay Pacific
Tue 2/900:10PER - ORD
1 stop27h 15mCathay Pacific
Deal found 13/7$2,308
Fri 29/806:45STL - PER
2 stops36h 00mCathay Pacific
Thu 4/900:10PER - STL
2 stops33h 22mCathay Pacific
Deal found 14/7$2,921
Fri 29/811:05STL - PER
3 stops35h 10mAir New Zealand
Fri 5/908:05PER - STL
2 stops27h 03mAir New Zealand
Deal found 14/7$3,968
Fri 29/809:17STL - PER
3 stops41h 43mMultiple Airlines
Fri 5/919:50PER - STL
3 stops41h 03mMultiple Airlines
Deal found 14/7$4,046
Thu 13/1116:05STL - PER
3 stops56h 25mAir Canada
Mon 17/1115:15PER - STL
3 stops62h 14mAir Canada
Deal found 12/7$4,249

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 15 July 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

Mon 18/8

16:00-01:40

2 stops44h 40m

Perth

Wed 3/9

18:35-14:25

2 stops56h 50m

$1,505

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 3/9

19:20-11:55

1 stop27h 35m

Perth

Tue 9/9

22:45-15:05

1 stop29h 20m

$2,028

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 29/8

06:00-11:55

2 stops40h 55m

Perth

Fri 5/9

15:40-17:34

2 stops62h 54m

$2,271

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 27/8

16:00-07:45

1 stop26h 45m

Perth

Tue 2/9

00:10-14:25

1 stop27h 15m

$2,308

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 29/8

06:45-07:45

2 stops36h 00m

Perth

Thu 4/9

00:10-20:32

2 stops33h 22m

$2,921

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 29/8

11:05-11:15

3 stops35h 10m

Perth

Fri 5/9

08:05-22:08

2 stops27h 03m

$3,968

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 29/8

09:17-16:00

3 stops41h 43m

Perth

Fri 5/9

19:50-23:53

3 stops41h 03m

$4,046

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

16:05-14:30

3 stops56h 25m

Perth

Mon 17/11

15:15-15:29

3 stops62h 14m

$4,249

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 1/8

06:40-17:10

3 stops45h 30m

$1,142

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 12/10

06:33-20:40

3 stops49h 07m

$1,157

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Showing 1-10 of 18 results
1
2

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 $286). Flying from Illinois to Perth in December is currently the most expensive (average of $409). 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.

Reviews of airlines servicing Perth

Get insights into the airlines that provide service to Perth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Perth. Reviews last updated 15 July 2025.
Check out reviews from past customers who have flown with Singapore Airlines, Air New Zealand, andCathay Pacific from Illinois to Perth to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Singapore Airlines
8.1
Very Good
1,326 reviews
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Air New Zealand
8.0
Very Good
494 reviews
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Cathay Pacific
7.6
Good
933 reviews
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qantas Airways
7.5
Good
877 reviews
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qatar Airways
7.4
Good
3,603 reviews
Singapore Airlines
8.1
Very Good
1,326 reviews
Check prices

Food

7.7

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

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.

  • What are the cheapest airlines to fly from Illinois to Perth one-way?

    To fly one-way, consider booking your trip with Qantas Airways, which is currently one of the cheapest options available, starting at $1,197. Etihad Airways flights start at $1,524 while deals on Cathay Pacific start at $1,578 one-way.

  • 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 $286). Flying from Illinois to Perth in December is currently the most expensive (average of $409). 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
Mandurah
Scarborough
Fremantle
Rottnest Island

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

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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?

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