HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Perth

$517+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PER
Dec 25 — Jan 11
Thu 12/25
Thu 1/1
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 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,170
(Trip.com)

One-way from

$517
(Trip.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 25, 2025.

This Trip.com deal was found by Cheapflights users on 11/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/252:35 pmORD - PER
2 stops44h 40mMultiple Airlines
Tue 12/26:00 pmPER - ORD
2 stops56h 55mMultiple Airlines
Deal found 11/24$1,127
This oojo deal was found by Cheapflights users on 11/24. 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.
Tue 11/252:35 pmORD - PER
1 stop42h 20mCathay Pacific
Mon 12/112:25 amPER - ORD
1 stop26h 30mCathay Pacific
Deal found 11/24$1,815
This oojo deal was found by Cheapflights users on 11/25. 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.
Tue 12/162:35 pmORD - PER
1 stop26h 20mCathay Pacific
Fri 1/308:30 amPER - ORD
1 stop42h 25mCathay Pacific
Deal found 11/25$2,065
This Cathay Pacific deal was found by Cheapflights users on 11/25. 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.
Tue 12/1611:10 amORD - PER
2 stops45h 45mMultiple Airlines
Fri 1/308:30 amPER - ORD
1 stop42h 25mMultiple Airlines
Deal found 11/25$2,094
This oojo deal was found by Cheapflights users on 11/24. 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 stop42h 20mCathay Pacific
Sun 1/118:30 amPER - ORD
1 stop42h 25mCathay Pacific
Deal found 11/24$2,145
This Cathay Pacific deal was found by Cheapflights users on 11/24. 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 stop26h 20mMultiple Airlines
Sun 1/118:30 amPER - ORD
2 stops42h 02mMultiple Airlines
Deal found 11/24$2,180

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 25, 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

Fri 1/30

6:40 pm-2:30 pm

2 stops29h 50m

Perth

Sat 2/21

8:00 am-9:33 pm

2 stops27h 33m

$1,544

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 1/28

3:10 pm-5:20 pm

2 stops36h 10m

Perth

Tue 2/17

3:55 pm-5:36 pm

2 stops39h 41m

$1,550

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

$1,561

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sat 1/10

2:35 pm-6:55 am

1 stop26h 20m

Perth

Fri 1/30

12:25 am-12:55 pm

1 stop26h 30m

$1,661

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 1/8

7:04 am-9:00 pm

2 stops47h 56m

Perth

Thu 1/15

5:45 pm-2:47 pm

2 stops35h 02m

$1,689

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 1/7

11:55 am-7:45 am

2 stops29h 50m

Perth

Wed 1/14

5:45 pm-2:47 pm

2 stops35h 02m

$1,783

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Wed 1/28

9:02 am-10:55 pm

2 stops47h 53m

Perth

Mon 2/16

12:25 am-12:55 pm

1 stop26h 30m

$1,844

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 1/8

7:04 am-9:00 pm

2 stops47h 56m

Perth

Thu 1/15

11:55 pm-3:29 pm

3 stops53h 34m

$2,019

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 1/8

7:04 am-6:55 am

2 stops33h 51m

Perth

Wed 1/14

12:25 am-11:59 pm

2 stops61h 34m

$2,125

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 1/7

6:00 am-6:55 am

2 stops34h 55m

Perth

Tue 1/13

12:25 am-11:59 pm

2 stops37h 34m

$2,199

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 19 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 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 25, 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 29h 50m. Fly via Qantas Airways or Cathay Pacific to get the fastest option. Airlines will cover a distance of 10947 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.
Seattle to Perth flights
John F Kennedy Intl to Perth flights
Hobby to Perth flights
LaGuardia to Perth flights
Newark to Perth flights
Los Angeles to Perth flights
George Bush Intcntl to Perth flights
San Francisco to Perth flights
Sky Harbor Intl to Perth flights
O'Hare Intl to Perth flights
Boston to Perth flights
Reagan-National to Perth flights
Denver to Perth flights
Miami to Perth flights
Dulles Intl to Perth flights
Baltimore to Perth flights
Dallas/Fort Worth to Perth flights
Minneapolis to Perth flights
Pittsburgh to Perth flights
Portland to Perth flights
Des Moines to Perth flights
Ontario to Perth flights
Salt Lake City to Perth flights
Philadelphia to Perth flights
Detroit to Perth flights
Burbank to Perth flights
San Diego to Perth flights
Cleveland to Perth flights
Orlando to Perth flights
Santa Ana to Perth flights
San Jose to Perth flights
Atlanta to Perth flights
Oakland to Perth flights
Indianapolis to Perth flights
New Orleans to Perth flights
Columbus to Perth flights
Jacksonville to Perth flights
Tampa to Perth flights
Sacramento to Perth flights
Kansas City to Perth flights
Honolulu to Perth flights
Raleigh to Perth flights
Las Vegas to Perth flights
Louisville to Perth flights
Richmond to Perth flights
Love Field to Perth flights
Tulsa to Perth flights
St. Louis to Perth flights
West Palm Beach to Perth flights
Charlotte 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,191Average$1,380FlexibilityNo cancel feeOn-time74%
Qatar AirwaysCheapest$1,229Average$1,775FlexibilityNo cancel feeOn-time68%
Cathay PacificCheapest$1,470Average$1,786FlexibilityNo 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.