HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Perth

$673+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PER
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis 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 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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,601
(Travelocity)

One-way from

$673
(Kiwi.com)
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
One-way flight from Lambert-St Louis to Perth
Search Deals

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 April 15, 2025.

This Travelocity deal was found by Cheapflights users on 4/15. 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.
Wed 5/146:30 amSTL - PER
2 stops47h 10mMultiple Airlines
Wed 5/2110:45 pmPER - STL
2 stops38h 19mMultiple Airlines
Deal found 4/15$1,601
This Jetabroad deal was found by Cheapflights users on 4/15. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/175:51 pmSTL - PER
2 stops33h 09mAir New Zealand
Mon 8/252:35 pmPER - STL
3 stops44h 33mAir New Zealand
Deal found 4/15$1,686
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Tue 4/156:44 amSTL - PER
2 stops46h 56mQatar Airways
Tue 4/2210:45 pmPER - STL
2 stops59h 13mQatar Airways
Deal found 4/14$1,797
This StudentUniverse deal was found by Cheapflights users on 4/15. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/146:52 amSTL - PER
2 stops35h 53mCathay Pacific
Fri 5/2312:10 amPER - STL
2 stops35h 35mCathay Pacific
Deal found 4/15$1,932
This United Airlines deal was found by Cheapflights users on 4/15. 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 6/47:10 pmSTL - PER
2 stops28h 45mUnited Airlines
Sun 8/311:45 pmPER - STL
2 stops30h 00mUnited Airlines
Deal found 4/15$1,945
This Qantas Airways deal was found by Cheapflights users on 4/15. 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 6/47:05 pmSTL - PER
2 stops33h 00mQantas Airways
Wed 8/610:30 amPER - STL
2 stops25h 27mQantas Airways
Deal found 4/15$1,957
This Aunt Betty deal was found by Cheapflights users on 4/15. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/24:32 pmSTL - PER
3 stops39h 58mAir Canada
Sun 8/33:30 pmPER - STL
3 stops38h 01mAir Canada
Deal found 4/15$2,525

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 April 15, 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 5/14

6:30 am-6:40 pm

2 stops47h 10m

Perth

Wed 5/21

10:45 pm-12:04 am

2 stops38h 19m

$1,601

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 8/17

5:51 pm-4:00 pm

2 stops33h 09m

Perth

Mon 8/25

2:35 pm-10:08 pm

3 stops44h 33m

$1,686

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 5/11

2:20 pm-6:40 pm

2 stops39h 20m

Perth

Fri 5/23

10:45 pm-12:04 am

2 stops38h 19m

$1,865

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 5/14

6:52 am-7:45 am

2 stops35h 53m

Perth

Fri 5/23

12:10 am-10:45 pm

2 stops35h 35m

$1,932

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 6/4

7:10 pm-12:55 pm

2 stops28h 45m

Perth

Sun 8/3

11:45 pm-4:45 pm

2 stops30h 00m

$1,945

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 6/4

7:05 pm-5:05 pm

2 stops33h 00m

Perth

Wed 8/6

10:30 am-10:57 pm

2 stops25h 27m

$1,957

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 6/2

4:32 pm-9:30 pm

3 stops39h 58m

Perth

Sun 8/3

3:30 pm-4:31 pm

3 stops38h 01m

$2,525

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 5/28

3:03 pm-2:55 pm

3 stops58h 52m

$673

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 5/26

7:19 pm-5:05 pm

2 stops32h 46m

$1,194

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 5/29

7:10 pm-2:40 pm

2 stops30h 30m

$1,251

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on St. Louis-Perth flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 15, 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 April 15, 2025.
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Air New Zealand
8.0
Very good
464 reviews
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Cathay Pacific
7.5
Good
846 reviews
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Qantas Airways
7.5
Good
818 reviews
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Qatar Airways
7.4
Good
3,551 reviews
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
United Airlines
7.4
Good
8,658 reviews
Air New Zealand
8.0
Very good
464 reviews

Crew

8.5

Boarding

8.2

Food

7.2

Entertainment

7.4

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.

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 Air New Zealand is currently your cheapest option to Perth, with prices starting at $1,686. Additional round-trip tickets that might be worth considering are offered by Qatar Airways and Cathay Pacific, with the lowest prices starting at $1,832 and $1,932, 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
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 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,691Average$2,499FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,928Average$1,936FlexibilityNo cancel feeOn-time69%

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.