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Perth

$1,795+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PER
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,795
(Gurufare)
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.
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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 March 26, 2025.

This Justfly.com deal was found by Cheapflights users on 3/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/247:19 pmSTL - PER
2 stops48h 31mQantas Airways
Mon 8/411:55 pmPER - STL
2 stops32h 36mQantas Airways
Deal found 3/25$1,811
This oojo deal was found by Cheapflights users on 3/25. 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.
Fri 5/96:30 amSTL - PER
2 stops47h 10mQatar Airways
Fri 5/1610:45 pmPER - STL
2 stops38h 19mQatar Airways
Deal found 3/25$1,941
This Air New Zealand deal was found by Cheapflights users on 3/25. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/241:42 pmSTL - PER
3 stops37h 18mMultiple Airlines
Sun 8/38:05 amPER - STL
2 stops27h 10mMultiple Airlines
Deal found 3/25$2,152
This oojo deal was found by Cheapflights users on 3/25. 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.
Fri 5/96:00 amSTL - PER
2 stops36h 45mCathay Pacific
Thu 5/1512:10 amPER - STL
2 stops35h 54mCathay Pacific
Deal found 3/25$2,395
This United deal was found by Cheapflights users on 3/25. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/246:10 amSTL - PER
2 stops41h 20mUnited Airlines
Sat 8/21:10 amPER - STL
2 stops28h 35mUnited Airlines
Deal found 3/25$2,679
This Gurufare deal was found by Cheapflights users on 3/25. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:27 pmSTL - PER
3 stops41h 28mLufthansa
Mon 8/41:45 pmPER - STL
2 stops60h 45mLufthansa
Deal found 3/25$3,139

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 March 26, 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

Sat 5/24

7:19 pm-8:50 am

2 stops48h 31m

Perth

Mon 8/4

11:55 pm-7:31 pm

2 stops32h 36m

$1,811

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 5/9

6:30 am-6:40 pm

2 stops47h 10m

Perth

Fri 5/16

10:45 pm-12:04 am

2 stops38h 19m

$1,941

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 5/24

1:42 pm-4:00 pm

3 stops37h 18m

Perth

Sun 8/3

8:05 am-10:15 pm

2 stops27h 10m

$2,152

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 5/9

6:00 am-7:45 am

2 stops36h 45m

Perth

Thu 5/15

12:10 am-11:04 pm

2 stops35h 54m

$2,395

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 5/24

6:10 am-12:30 pm

2 stops41h 20m

Perth

Sat 8/2

1:10 am-4:45 pm

2 stops28h 35m

$2,679

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 5/24

5:27 pm-11:55 pm

3 stops41h 28m

Perth

Mon 8/4

1:45 pm-1:30 pm

2 stops60h 45m

$3,139

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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.

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 March 26, 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 March 26, 2025.
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you
Qantas Airways
7.5
Good
811 reviews
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you
Cathay Pacific
7.5
Good
835 reviews
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you
Qatar Airways
7.4
Good
3,539 reviews
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you
United Airlines
7.4
Good
8,608 reviews
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you
Air Canada
7.0
Good
8,960 reviews
Qantas Airways
7.5
Good
811 reviews

Boarding

7.6

Comfort

7.4

Overall

7.5

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20
8.0
Excellent

Tin,Feb 2025

LAX - MEL

The passengers had to wait in lines more than 40 minutes for boarding. The foods was okay to eat if you were hungry to dead . Thank you

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 $1,795. Additional round-trip tickets that might be worth considering are offered by Qatar Airways and Air Canada, with the lowest prices starting at $1,941 and $2,223, 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 $1,447). 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
Mandurah
Fremantle
Rottnest Island
Scarborough

Browse thousands of different options on Cheapflights for your next trip

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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 2 airlines flying from St. Louis to Perth

Discover the top 2 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,691Average$2,499FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,928Average$1,936FlexibilityNo cancel feeOn-time69%
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