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$717+ Cheap flights from St. Louis (STL) 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PER
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$1,844
(oojo)

One-way from

$717
(Kiwi.com)
From Lambert-St Louis to Perth
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One-way flight from Lambert-St Louis to Perth
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Find 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 June 12, 2025.

This oojo deal was found by Cheapflights users on 6/10. 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.
Wed 7/97:38 pmSTL - PER
2 stops32h 27mQantas Airways
Wed 7/1610:30 amPER - STL
2 stops26h 00mQantas Airways
Deal found 6/10$1,844
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/95:41 pmSTL - PER
2 stops31h 59mUnited Airlines
Wed 7/1611:55 pmPER - STL
3 stops29h 50mUnited Airlines
Deal found 6/10$2,153
This oojo deal was found by Cheapflights users on 6/10. 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.
Wed 7/97:23 amSTL - PER
2 stops35h 22mCathay Pacific
Tue 7/1512:10 amPER - STL
2 stops36h 20mCathay Pacific
Deal found 6/10$2,285
This Qantas Airways deal was found by Cheapflights users on 6/10. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/912:27 pmSTL - PER
3 stops33h 48mMultiple Airlines
Wed 7/1610:30 amPER - STL
2 stops26h 00mMultiple Airlines
Deal found 6/10$2,953
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/94:45 pmSTL - PER
3 stops34h 00mAir Canada
Wed 7/1611:35 pmPER - STL
3 stops35h 15mAir Canada
Deal found 6/10$3,183

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 June 12, 2025.
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

Wed 7/9

7:38 pm-5:05 pm

2 stops32h 27m

Perth

Wed 7/16

10:30 am-11:30 pm

2 stops26h 00m

$1,844

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 7/9

5:41 pm-2:40 pm

2 stops31h 59m

Perth

Wed 7/16

11:55 pm-4:45 pm

3 stops29h 50m

$2,153

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 7/9

7:23 am-7:45 am

2 stops35h 22m

Perth

Tue 7/15

12:10 am-11:30 pm

2 stops36h 20m

$2,285

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 7/9

12:27 pm-11:15 am

3 stops33h 48m

Perth

Wed 7/16

10:30 am-11:30 pm

2 stops26h 00m

$2,953

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 7/9

4:45 pm-3:45 pm

3 stops34h 00m

Perth

Wed 7/16

11:35 pm-9:50 pm

3 stops35h 15m

$3,183

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 8/24

6:47 pm-4:15 pm

3 stops56h 28m

$717

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 8/24

6:00 am-11:10 am

2 stops40h 10m

$818

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 7/22

7:38 pm-5:05 pm

2 stops32h 27m

$873

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Perth

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

Find hourly flight availability from St. Louis 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 June 12, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 47% on flights from St. Louis to Perth by exploring options for tickets at noon.

Rainfall in Perth by month

Plan your trip to Perth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Perth ranges from 0.0 - 6.7 inches per month. June is typically the wettest month, when rainfall can reach 6.7 in. January is typically the driest time to visit Perth when rainfall is around 0.0 in.

Temperature in Perth by month

Plan your trip to Perth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Perth, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.
Cathay Pacific
7.6
Good
892 reviews
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.
Qantas Airways
7.5
Good
854 reviews
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.
Qatar Airways
7.4
Good
3,584 reviews
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.
United Airlines
7.4
Good
8,790 reviews
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.
Air Canada
7.1
Good
9,537 reviews
Cathay Pacific
7.6
Good
892 reviews

Crew

8.0

Overall

7.6

Boarding

7.9

Comfort

7.6

Food

7.3

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

KS,Jun 2025

TFU - HKG

I like the crews and flights, English over the speakers were difficult to understand. The beef dinner was off flavor.

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.

  • What are the cheapest airlines flying from St. Louis to Perth round-trip?

    Flying on Qantas Airways is currently your cheapest option to Perth, with prices starting at $1,844. Additional round-trip tickets that might be worth considering are offered by United Airlines and Cathay Pacific, with the lowest prices starting at $2,153 and $2,285, respectively.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Perth?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Perth (average of $1,456). Flying from St. Louis to Perth in December is currently the most expensive (average of $2,172). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Fremantle
Rottnest Island
Scarborough

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Alternative routes for St. Louis to Perth

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Perth flights

Top 3 airlines flying from St. Louis to Perth

Discover the top 3 airlines that operate flights from St. Louis 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$1,449Average$1,715FlexibilityNo cancel feeOn-time68%
Qantas AirwaysCheapest$1,691Average$2,465FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,928Average$1,936FlexibilityNo cancel feeOn-time69%

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