STL - PER

$1,743 Find Cheap Flights from St. Louis to Perth

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Perth departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Perth

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Perth, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Perth, as well as popular online travel agencies
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Flights Deals

Cheap Flights from St. Louis to Perth

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Perth that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from St. Louis to Perth

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Perth.
Discover the best prices for you by selecting your travel dates on KAYAK.
Qatar Airways Logo
6:30 am - 6:40 pmSTL-PER
47h 10m2 stops
Qatar Airways Logo
10:45 pm - 12:04 amPER-STL
38h 19m2 stops
$1,743Qatar Airways
Find Deal
Wed, May 14 - Wed, May 21
Cathay Pacific Logo
6:52 am - 10:40 pmSTL-PER
50h 48m2 stops
Cathay Pacific Logo
12:10 am - 6:33 pmPER-STL
31h 23m2 stops
$1,815Cathay Pacific
Find Deal
Wed, May 14 - Tue, May 20
Qantas Airways Logo
7:05 pm - 5:05 pmSTL-PER
33h 00m2 stops
Qantas Airways Logo
11:55 pm - 7:31 pmPER-STL
32h 36m2 stops
$2,011Qantas Airways
Find Deal
Wed, May 28 - Mon, Aug 4
Qantas Airways Logo
4:52 pm - 5:05 pmSTL-PER
35h 13m2 stops
Qantas Airways Logo
11:55 pm - 7:31 pmPER-STL
32h 36m2 stops
$2,028Qantas Airways
Find Deal
Wed, May 28 - Mon, Aug 4
Air New Zealand Logo
6:00 am - 1:35 pmSTL-PER
42h 35m3 stops
Air New Zealand Logo
11:55 pm - 4:45 pmPER-STL
29h 50m2 stops
$2,085Air New Zealand
Find Deal
Wed, May 28 - Mon, Aug 4
Air New Zealand Logo
6:00 am - 1:35 pmSTL-PER
42h 35m3 stops
Air New Zealand Logo
11:55 pm - 4:45 pmPER-STL
29h 50m2 stops
$2,094Air New Zealand
Find Deal
Wed, May 28 - Mon, Aug 4
 Logo
9:50 am - 4:00 pmSTL-PER
41h 10m3 stops
 Logo
7:50 pm - 11:59 pmPER-STL
41h 09m3 stops
$2,239
Find Deal
Wed, May 28 - Mon, Aug 4
 Logo
9:50 am - 4:00 pmSTL-PER
41h 10m3 stops
 Logo
7:50 pm - 11:59 pmPER-STL
41h 09m3 stops
$2,339
Find Deal
Wed, May 28 - Mon, Aug 4
United Airlines Logo
6:10 am - 12:30 pmSTL-PER
41h 20m2 stops
United Airlines Logo
1:10 am - 4:45 pmPER-STL
28h 35m2 stops
$2,517United Airlines
Find Deal
Sat, May 24 - Sat, Aug 2
United Airlines Logo
7:10 pm - 2:40 pmSTL-PER
30h 30m2 stops
United Airlines Logo
1:10 am - 4:45 pmPER-STL
52h 35m2 stops
$2,558United Airlines
Find Deal
Wed, May 28 - Sun, Aug 3
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KAYAK's insights & trends for St. Louis to Perth flights

Get data-powered insights and trends into flights from St. Louis to Perth to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Perth?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Perth were found on Qatar Airways ($1,743) and Cathay Pacific ($1,815).

Good to know

Cheapest flight$1,743
Flight from St. Louis to Perth

When to book flights from St. Louis to Perth

Are your dates flexible? Find out the best times to travel from St. Louis to Perth based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Perth

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

    In the last 3 days, the lowest price for a flight from St. Louis to Perth was $1,743 for a round-trip ticket.

  • Do I need a passport to fly between St. Louis and Perth?

    A passport is required to fly from St. Louis to Perth.

  • Which airports will I be using when flying from St. Louis to Perth?

    St. Louis and Perth are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Perth.

  • Which aircraft models fly most regularly from St. Louis to Perth?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Perth?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Perth, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Perth, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Perth are Qantas Airways and United Airlines. With an average price for the route of $2,499 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,936 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Perth?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Perth.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Perth?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Perth from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Perth?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Perth with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PER can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Perth?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Perth from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 3 airlines serving from St. Louis to Perth

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Perth. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Perth? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 829 reviews
6.9Food
7.4Comfort
8.2Crew
7.2Entertainment
7.7Boarding
Airline reviews

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

10.0 ExcellentAnonymous, Apr 2025SYD - BXG
Read more Qantas Airways reviews

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Loved the staff. The economy seats could have been bigger.

Airport and crew experience was excellent. We had to queue for the runway - no one’s fault, but it did mean we were 30 minutes late leaving

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

I liked the service, the menu, and the comfort of the seats! Even tho we were seated by the bathrooms, the reclining seats and movie selection was very good, my husband and I didn’t mind at all

Very good as always, stand out airline. The passengers whom choose to stuff baggage that otherwise should be checked-in is a real bother but that's not the airlines doing. A real frustration that passengers just don't want to check-in luggage. This is a pet hate unfortunately.

It’s a two prop flight so I had problems with my ears on re- entering ! But otherwise fine

I love flying with Qantas. There was no onscreen entertaining on this flight, and only a snack provided (not a meal) but still better than Jetstar or Virgin (in my opinion) so still happy.

The food was terrible. And the flight attendants were very rude. One flight attendant wouldn’t help a passenger lift their carry-on. Another flight attendant wouldn’t give a man an extra blanket. And they walked by not even looking at the passengers to see if they needed a glass of water.

Wheelchair assistance to move through the terminals and to/from the plane door was excellent. No vegan snack on the flight, only something with salami and cheese in it.

This trip was the most comfortable one I have ever experienced, the team was excellent and very helpful. I am so glad I picked Qatar Airways.

All the crew members were too slow and rude. Most of the times the registers were empty, while hundreds of customers were waiting in line, and it was impossible to get a supervisor. Despite being in line on time, I missed my freight, plus a some customers who were ahead and behind me.

Well organized boarding, efficient and on time. Nice crew on the plane. Thank you!

The Qatar Airways staff pre-boarding and also on the flight from Dallas to Doha were incredibly mediocre and arrogant. Consider retraining these individuals Other flights were ok.

My experience with Qatar airway was very unsatisfactory. They lost my child’s stroller and I was told they found it and will send it to the hotel which was a lie. I had to go back to the airport baggage claim and pick up myself after trying to contact them many times!. There was a lack professional and communication. I am very disappointed in Qatar airway and will not be recommending them to friends and family nor will I be flying with them in the future.

Worst air experience in whole life . Boarding and checking was hassle as they did 3 times. Crew team was clueless about passengers need. Despite of passengers raising hand , they were resetting the program

The food is not good and also if you ask crew to bring something they say ok I will bring but you will never get it. Please they should listen good to passengers

No difference between US airline and Qatar. Both cramp as many people. The airline seems to change planes without notice choice is seating when making reservations online doesn’t match the plane a passenger is on. Especially paying extra. Nothing special No different than US carriers.

Did not like anything. Seats were crammed, leg space was minimal and food was terrible. This was the first time traveling overseas in American Airlines and was the worst experience ever. Have learned a lesson to never travel in American Airlines.

Delayed my flights and no communication. We end up spending 6 hrs in Doha. No food or any concern from the airline. Terrible

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

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

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