HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Perth

$669+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Perth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,123
(Trip.com)

One-way from

$669
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$1,687
Provider with most accurate pricing for Chicago (CHI)-Perth flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Perth flights.
Search Deals
From Illinois to Perth
Search Deals
One-way flight from Illinois to Perth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($290 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($84 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 12, 2025.

This Priceline deal was found by Cheapflights users on 11/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amSTL - PER
2 stops45h 15mQantas Airways
Fri 11/1410:40 pmPER - STL
2 stops31h 47mQantas Airways
Deal found 11/10$1,683
This oojo deal was found by Cheapflights users on 11/10. 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.
Fri 11/147:00 amSTL - PER
2 stops38h 55mQatar Airways
Sun 11/1610:45 pmPER - STL
2 stops39h 14mQatar Airways
Deal found 11/10$1,726
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Thu 11/205:35 amPER - ORD
3 stops43h 55mMultiple Airlines
Deal found 11/11$1,815
This FlightHub deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop42h 20mCathay Pacific
Tue 11/188:30 amPER - ORD
1 stop42h 25mCathay Pacific
Deal found 11/11$1,825
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Tue 11/187:35 amPER - ORD
3 stops41h 55mMultiple Airlines
Deal found 11/11$1,828
This Qantas Airways deal was found by Cheapflights users on 11/9. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:00 amSTL - PER
2 stops48h 15mQantas Airways
Mon 11/175:45 pmPER - STL
2 stops43h 57mQantas Airways
Deal found 11/9$1,838
This Cathay Pacific deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop26h 20mCathay Pacific
Wed 11/1912:25 amPER - ORD
1 stop26h 30mCathay Pacific
Deal found 11/11$1,840
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Thu 11/132:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Sat 11/1511:10 pmPER - ORD
3 stops50h 20mMultiple Airlines
Deal found 11/9$1,877
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Wed 11/195:35 amPER - ORD
2 stops40h 00mMultiple Airlines
Deal found 11/11$1,885
This Cathay Pacific deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop42h 20mCathay Pacific
Sat 11/1512:25 amPER - ORD
1 stop26h 30mCathay Pacific
Deal found 11/11$1,890
This EaseMyTrip deal was found by Cheapflights users on 11/11. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:35 pmORD - PER
1 stop42h 20mCathay Pacific
Fri 12/58:30 amPER - ORD
1 stop42h 25mCathay Pacific
Deal found 11/11$1,918
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/122:35 pmORD - PER
1 stop26h 20mMultiple Airlines
Sun 11/1611:10 pmPER - ORD
2 stops46h 25mMultiple Airlines
Deal found 11/11$1,928

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 November 12, 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

Sun 2/8

1:10 pm-1:15 am

2 stops46h 05m

Perth

Sat 2/28

6:00 pm-7:35 am

2 stops51h 35m

$1,123

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 1/28

3:40 pm-9:35 pm

2 stops39h 55m

Perth

Tue 2/17

4:45 pm-2:41 pm

2 stops35h 56m

$1,672

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Fri 1/30

3:40 pm-9:35 pm

2 stops39h 55m

Perth

Sat 2/21

3:15 pm-7:30 pm

3 stops42h 15m

$1,720

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 1/28

2:35 pm-10:55 pm

1 stop42h 20m

Perth

Mon 2/16

12:25 am-12:55 pm

1 stop26h 30m

$1,819

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 2/2

2:35 pm-10:55 pm

1 stop42h 20m

Perth

Mon 2/9

8:30 am-12:55 pm

1 stop42h 25m

$1,820

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Thu 2/5

2:35 pm-6:55 am

1 stop26h 20m

Perth

Sun 2/22

12:25 am-12:55 pm

1 stop26h 30m

$1,840

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 1/28

6:00 am-6:55 am

2 stops34h 55m

Perth

Mon 2/16

12:25 am-12:55 pm

1 stop26h 30m

$1,844

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Mon 2/2

3:10 pm-10:55 pm

2 stops41h 45m

Perth

Mon 2/9

8:30 am-12:55 pm

1 stop42h 25m

$1,844

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 12/24

10:30 am-11:20 am

2 stops34h 50m

Perth

Wed 12/31

7:20 am-10:30 pm

2 stops29h 10m

$2,719

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 12/9

1:20 pm-7:45 am

2 stops28h 25m

Perth

Sun 1/4

5:45 pm-11:51 pm

2 stops44h 06m

$2,871

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 26 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 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 November 12, 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 34h 50m. Fly via Air Canada, Cathay Pacific, or United Airlines 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

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.

Alternative routes for Illinois to Perth

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Perth flights
Los Angeles to Perth flights
Hobby to Perth flights
Newark to Perth flights
LaGuardia to Perth flights
Sky Harbor Intl to Perth flights
George Bush Intcntl to Perth flights
San Francisco to Perth flights
Ontario to Perth flights
Seattle to Perth flights
Dulles Intl to Perth flights
Boston to Perth flights
O'Hare Intl to Perth flights
Santa Ana to Perth flights
Reagan-National to Perth flights
Atlanta to Perth flights
Burbank to Perth flights
Miami to Perth flights
Denver to Perth flights
Dallas/Fort Worth to Perth flights
Baltimore to Perth flights
Des Moines to Perth flights
Honolulu to Perth flights
Columbus to Perth flights
Orlando to Perth flights
San Jose to Perth flights
Oakland to Perth flights
Salt Lake City to Perth flights
Cleveland to Perth flights
St. Louis to Perth flights
Philadelphia to Perth flights
Austin to Perth flights
Nashville to Perth flights
Richmond to Perth flights
Jacksonville to Perth flights
Raleigh to Perth flights
Detroit to Perth flights
Tampa to Perth flights
Love Field to Perth flights
Kansas City to Perth flights
Portland to Perth flights
Pittsburgh to Perth flights
West Palm Beach to Perth flights
Minneapolis to Perth flights
Fort Lauderdale to Perth flights
Birmingham to Perth flights
San Diego to Perth flights
Tulsa to Perth flights
Eugene to Perth flights
Las Vegas to Perth flights

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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,191Average$1,407FlexibilityNo cancel feeOn-time74%
Qatar AirwaysCheapest$1,229Average$1,331FlexibilityNo cancel feeOn-time68%
Cathay PacificCheapest$1,470Average$2,048FlexibilityNo cancel feeOn-time72%

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.