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Perth

$667+ Cheap flights from Illinois to Perth (PER)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
1 adult, Economy
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Cheap 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 December 2, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Mon 12/88:25 pmPER - ORD
3 stops53h 05mMultiple Airlines
Deal found 12/2$2,091
This American Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:13 pmORD - PER
2 stops30h 52mAmerican Airlines
Sun 1/1110:40 pmPER - ORD
2 stops32h 29mAmerican Airlines
Deal found 12/2$2,116
This Cathay Pacific deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/272:35 pmORD - PER
1 stop42h 20mMultiple Airlines
Sun 1/118:30 amPER - ORD
2 stops41h 55mMultiple Airlines
Deal found 12/1$2,180
This Ovago deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:46 pmORD - PER
2 stops35h 29mQantas Airways
Sun 1/1110:45 pmPER - ORD
2 stops36h 38mQantas Airways
Deal found 12/1$2,206
This FlightHub deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/68:52 amORD - PER
2 stops37h 03mQatar Airways
Mon 12/83:55 pmPER - ORD
1 stop36h 35mQatar Airways
Deal found 12/2$2,324
This BestPriceTravel deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BestPriceTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/121:15 pmORD - PER
2 stops28h 30mQantas Airways
Sun 1/410:45 pmPER - ORD
2 stops32h 06mQantas Airways
Deal found 12/1$2,353
This oojo deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/272:35 pmORD - PER
1 stop26h 20mCathay Pacific
Sun 1/118:30 amPER - ORD
1 stop42h 25mCathay Pacific
Deal found 12/2$2,370

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 December 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,349
(Expedia)

One-way from

$667
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$2,074
Provider with most accurate pricing for Chicago (CHI)-Perth flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Perth flights.
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From Illinois to Perth
Search Deals
One-way flight from Illinois to Perth
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($296 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($85 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated December 2, 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

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 2/28

10:04 am-10:55 pm

2 stops46h 51m

Perth

Tue 3/3

12:25 am-11:48 pm

2 stops37h 23m

$1,435

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 3/2

10:04 am-10:55 pm

2 stops46h 51m

Perth

Fri 3/6

12:25 am-11:48 pm

2 stops37h 23m

$1,435

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 2/28

10:04 am-6:55 am

2 stops30h 51m

Perth

Tue 3/3

12:25 am-11:48 pm

2 stops37h 23m

$1,474

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 3/23

4:45 pm-2:30 pm

2 stops32h 45m

Perth

Wed 4/8

10:30 am-11:59 pm

2 stops26h 29m

$1,577

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 3/25

1:15 pm-5:20 pm

2 stops39h 05m

Perth

Mon 4/6

6:20 am-9:26 pm

2 stops28h 06m

$1,595

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 3/25

2:55 pm-5:20 pm

2 stops37h 25m

Perth

Sat 4/4

5:20 am-11:02 pm

2 stops30h 42m

$1,595

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 3/22

7:59 pm-6:15 pm

2 stops33h 16m

Perth

Wed 4/8

10:30 am-11:59 pm

2 stops26h 29m

$1,596

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 3/21

7:59 pm-6:00 pm

2 stops33h 01m

Perth

Wed 4/8

10:30 am-11:59 pm

2 stops26h 29m

$1,596

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Thu 2/12

4:30 pm-2:30 pm

2 stops32h 00m

Perth

Tue 3/17

10:45 pm-5:46 pm

2 stops32h 01m

$1,599

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 3/23

4:45 pm-2:30 pm

2 stops32h 45m

Perth

Sat 4/4

5:20 am-11:02 pm

2 stops30h 42m

$1,599

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 22 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 round-trip 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 $1,173). Flying from Illinois to Perth in June is currently the most expensive (average of $2,077). 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.

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

Find hourly flight availability from Illinois to Perth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 2, 2025.

It’s optimal to fly from Illinois to Perth in the evening. By choosing this option you can save up to 38% on the cost of your flight, compared to a flight in the afternoon.

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?

    If you book a flight to Perth from Illinois, you will be flying to Perth, which is the city’s only airport. Perth (PER) is located 6.3 mi from the center of Perth.

  • How long is the flight from Illinois to Perth?

    There are many flights that can get you from Illinois to Perth in 30h 51m. Fly via Cathay Pacific or Qantas Airways to get the fastest option. Airlines will cover a distance of 10878 mi. This flight may include one or multiple 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 vacation 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 $1,173). Flying from Illinois to Perth in June is currently the most expensive (average of $2,077). 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

Traveling to a place near Perth?

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

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Alternative routes for Illinois to Perth

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Top 3 airlines flying from Illinois to Perth

Discover the top 3 airlines that operate flights from Illinois to Perth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,191Average$1,676FlexibilityNo cancel feeOn-time74%
Qatar AirwaysCheapest$1,229Average$1,775FlexibilityNo cancel feeOn-time68%
Cathay PacificCheapest$1,418Average$1,835FlexibilityNo cancel feeOn-time72%

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