$950 Cheap Flights from Perth (PER) to St. Louis (STL)

View $950 flight on Fri, May 15, 2026Opens in a new window

Popular airlines from Perth Airport (PER) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Perth to St. Louis (PER-STL)

Prices were available within the past 7 days and start at $950 for one-way flights and $2,089 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,089 Roundtrip, found 6 days ago
$2,089
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,089 found 6 days ago
Air Canada
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,154 Roundtrip, found 6 days ago
$2,154
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,154 found 6 days ago
Air Canada
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,187 Roundtrip, found 6 days ago
$2,187
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,187 found 6 days ago
Jetstar
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,191 Roundtrip, found 6 days ago
$2,191
Roundtrip
found 6 days ago
Select Jetstar flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,191 found 6 days ago
Jetstar
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,192 Roundtrip, found 6 days ago
$2,192
Roundtrip
found 6 days ago
Select Jetstar flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,192 found 6 days ago
Qantas Airways
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,210 Roundtrip, found 6 days ago
$2,210
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,210 found 6 days ago
Qantas Airways
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,233 Roundtrip, found 6 days ago
$2,233
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,233 found 6 days ago
Qantas Airways
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,245 Roundtrip, found 6 days ago
$2,245
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,245 found 6 days ago
Qatar Airways
Sat, Apr 25 - Wed, Apr 29
PER
Perth
STL
St. Louis
$2,398 Roundtrip, found 3 days ago
$2,398
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Sat, Apr 25 from Perth to St. Louis, returning Wed, Apr 29, priced at $2,398 found 3 days ago
Air New Zealand
Wed, May 20 - Wed, May 27
PER
Perth
STL
St. Louis
$2,431 Roundtrip, found 6 days ago
$2,431
Roundtrip
found 6 days ago
Select Air New Zealand flight, departing Wed, May 20 from Perth to St. Louis, returning Wed, May 27, priced at $2,431 found 6 days ago

Frequently asked questions

How much does a flight from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $950 and cheap return flights from $2,089 Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. Return flights typically cost between $1860 and $2859. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The cheapest month to fly from PER to STL is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter PER to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Qantas Airways is one of the cheapest airlines offering connecting flights from Perth (PER) to St. Louis (STL) with a layover in Tullamarine (MEL), starting from around $1806. This route offers a unique travel experience across the globe. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Perth Airport (PER) to Lambert-St. Louis International Airport (STL) typically departs at around 12:10 AM, operated by Cathay Pacific and American Airlines. This seasonal service can help you arrive in St. Louis early, giving you a full day to explore. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The busiest day for flights from (PER) to Lambert-St. Louis Intl. (STL) is a Thursday, with around 6 flights. This gives you plenty of options for your travel plans. Major airlines on this route include Qantas Airways, Virgin Australia, and Emirates.
What are the most popular departure times for flights from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Perth (PER) to St. Louis (STL) are in the late evening, from 9pm to midnight. This accounts for around 100% of total traffic, indicating that many travelers prefer this time window. Many major carriers, including Qantas, United Airlines, and Virgin Australia, offer flights during this window. This timing works well because it allows you to enjoy a full day in Perth before heading to the airport.
How long does it take to fly from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A flight from PER to STL with a layover takes around 25 hours, with the route covering approximately 10,887 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Business class seats are offered on the PER to STL route. Airlines that offer business class service on this route include:

  • Qatar Airways
  • Virgin Australia
  • Qantas Airways
  • Emirates

First class is available with Emirates.
How do I earn miles on a Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from PER (PER)?
From PER (PER), you can fly typically into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Kingsford Smith Intl. (SYD), Tullamarine (MEL), BNE (BNE) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Perth, WA (PER) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Perth
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$2,088
Distance
10885 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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