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Perth

$1,518+ Cheap flights from St. Louis (STL) to Perth (PER)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PER
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from St. Louis to Perth

Cheapest flights from St. Louis to Perth
Explore the most affordable flight options available from St. Louis to Perth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This oojo deal was found by Cheapflights users on 1/27. 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.
Mon 5/116:20 am
STL
-
PER
2 stops51h 20m
Cathay Pacific
Sat 5/1612:10 am
PER
-
STL
2 stops36h 49m
Cathay Pacific
Deal found 1/27$1,518
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 1/2811:05 am
STL
-
PER
2 stops29h 50m
Cathay Pacific
Wed 2/48:30 am
PER
-
STL
2 stops50h 45m
Cathay Pacific
Deal found 1/27$1,534
This Cathay Pacific deal was found by Cheapflights users on 1/26. 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.
Thu 3/56:50 pm
STL
-
PER
2 stops38h 05m
Cathay Pacific
Mon 3/98:30 am
PER
-
STL
2 stops46h 28m
Cathay Pacific
Deal found 1/26$1,770
This Travelocity deal was found by Cheapflights users on 1/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:30 am
STL
-
PER
3 stops43h 15m
Multiple Airlines
Sun 5/1711:55 pm
PER
-
STL
3 stops49h 11m
Multiple Airlines
Deal found 1/27$1,835
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2811:05 am
STL
-
PER
2 stops29h 50m
Multiple Airlines
Wed 2/410:55 pm
PER
-
STL
3 stops54h 34m
Multiple Airlines
Deal found 1/27$2,128
This Air Canada deal was found by Cheapflights users on 1/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/284:05 pm
STL
-
PER
3 stops56h 25m
Air Canada
Wed 2/43:15 pm
PER
-
STL
3 stops62h 14m
Air Canada
Deal found 1/27$2,787
This Air Canada deal was found by Cheapflights users on 1/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/54:05 pm
STL
-
PER
3 stops62h 15m
Air Canada
Mon 3/910:55 pm
PER
-
STL
3 stops53h 34m
Air Canada
Deal found 1/25$3,860

Find flight deals from St. Louis to Perth

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Perth (PER). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,518
(oojo)
Provider with most accurate pricing for Lambert-St Louis-Perth flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Perth flights.
Search Deals
From Lambert-St Louis to Perth
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 January 28, 2026.
Use the filters below to find and compare flights from St. Louis to Perth that are best for you.

Fly from

St. Louis

Fly to

Perth

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 5/11

6:20 am-10:40 pm

2 stops51h 20m

Perth

Sat 5/16

12:10 am-11:59 pm

2 stops36h 49m

$1,518

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 3/5

6:50 pm-10:55 pm

2 stops38h 05m

Perth

Mon 3/9

8:30 am-5:58 pm

2 stops46h 28m

$1,770

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 5/11

7:30 am-3:45 pm

3 stops43h 15m

Perth

Sun 5/17

11:55 pm-12:06 pm

3 stops49h 11m

$1,835

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 2/14

1:30 pm-6:45 pm

2 stops39h 15m

Perth

Fri 2/27

10:45 pm-12:33 pm

2 stops51h 48m

$9,142

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 2/14

8:00 am-12:25 pm

3 stops38h 25m

Perth

Fri 2/27

10:40 pm-5:13 pm

2 stops32h 33m

$18,131

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Compare providers for flights from St. Louis to Perth

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Perth in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Perth flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Perth flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Perth flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Perth flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Perth flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Perth

Have a flexible travel schedule? Discover the best time to fly to Perth from St. Louis 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Perth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Perth?

    Departing from St. Louis to Perth will take you 51h 20m. The distance from St. Louis to Perth is about 10878 mi.

  • Can I find deals for flights from St. Louis to Perth that include hotel bookings?

    Yes. In addition to deals on St. Louis to Perth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Perth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Perth.

  • Can I find deals for business class flights from St. Louis to Perth?

    Yes. Cheapflights offers flight deals from St. Louis 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.

See more FAQs

Traveling to a place near Perth?

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

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