How do I get Price Alerts for flights from St. Louis to Perth?

Search flight deals from St. Louis to Perth . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from St. Louis to Perth with momondo?

With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

When did momondo last update prices for flights from Lambert-St Louis Airport to Perth Airport?

Prices for flights from Lambert-St Louis Airport to Perth Airport refresh daily.

How old do you have to be to fly from Lambert-St Louis Airport to Perth Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Perth Airport.

What documentation or ID do you need to fly to Perth Airport?

The travel and health documents required for your trip to Perth Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Perth Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$2,227 Cheap Flights from St. Louis to Perth (STL-PER) in 2025

1 adult

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Find the cheapest flights from St. Louis to Perth (STL-PER)

Round-trip

One-way

Cheap return flights

18:13 - 22:50STL-PER

38h 37m2 stops

00:15 - 23:42PER-STL

37h 27m2 stops

$2,227Cathay Pacific

Find Deal

Thu, 13 Nov - Sun, 16 Nov

06:00 - 12:05STL-PER

40h 05m2 stops

06:20 - 20:21PER-STL

27h 01m2 stops

$2,532Qantas Airways

Find Deal

Fri, 6 Feb - Sat, 13 Jun

06:00 - 16:50STL-PER

44h 50m2 stops

16:25 - 22:06PER-STL

42h 41m3 stops

$3,194Air New Zealand

Find Deal

Fri, 6 Feb - Sat, 13 Jun

11:58 - 06:55STL-PER

52h 57m2 stops

00:10 - 23:23PER-STL

36h 13m2 stops

$3,229Cathay Pacific

Find Deal

Fri, 6 Feb - Fri, 12 Jun

14:45 - 15:55STL-PER

35h 10m3 stops

13:15 - 20:15PER-STL

44h 00m3 stops

$3,463Air Canada

Find Deal

Fri, 6 Feb - Sat, 13 Jun

16:05 - 14:30STL-PER

56h 25m3 stops

22:55 - 15:29PER-STL

54h 34m3 stops

$4,100Air Canada

Find Deal

Thu, 13 Nov - Mon, 17 Nov

16:05 - 14:30STL-PER

56h 25m3 stops

22:55 - 15:29PER-STL

54h 34m3 stops

$4,102Air Canada

Find Deal

Thu, 13 Nov - Mon, 17 Nov

17:00 - 14:45STL-PER

31h 45m2 stops

01:10 - 15:21PER-STL

51h 11m3 stops

$4,516United Airlines

Find Deal

Fri, 6 Feb - Fri, 12 Jun

Cathay Pacific flights from St. Louis to Perth

Our best Cathay Pacific deals on St. Louis to Perth flight tickets

Cathay Pacific

13 Nov

STL18:13Lambert-St Louis

38h 37m

2 stops

PER22:50Perth

16 Nov

PER00:15Perth

37h 27m

2 stops

STL23:42Lambert-St Louis

$2,227

Find similar

Cathay Pacific

6 Feb

STL11:58Lambert-St Louis

52h 57m

2 stops

PER06:55Perth

12 June

PER00:10Perth

36h 13m

2 stops

STL23:23Lambert-St Louis

$3,229

Find similar

Air Canada flights from St. Louis to Perth

Our best Air Canada deals on St. Louis to Perth flight tickets

Air Canada

6 Feb

STL14:45Lambert-St Louis

35h 10m

3 stops

PER15:55Perth

13 June

PER13:15Perth

44h 00m

3 stops

STL20:15Lambert-St Louis

$3,463

Find similar

Air Canada

13 Nov

STL16:05Lambert-St Louis

56h 25m

3 stops

PER14:30Perth

17 Nov

PER22:55Perth

54h 34m

3 stops

STL15:29Lambert-St Louis

$4,100

Find similar

Air Canada

13 Nov

STL16:05Lambert-St Louis

56h 25m

3 stops

PER14:30Perth

17 Nov

PER22:55Perth

54h 34m

3 stops

STL15:29Lambert-St Louis

$4,102

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

18:13-22:50

2 stops38h 37m

Perth

Sun 16/11

00:15-23:42

2 stops37h 27m

$2,227

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 6/2

06:00-12:05

2 stops40h 05m

Perth

Sat 13/6

06:20-20:21

2 stops27h 01m

$2,532

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 6/2

06:00-16:50

2 stops44h 50m

Perth

Sat 13/6

16:25-22:06

3 stops42h 41m

$3,194

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 6/2

11:58-06:55

2 stops52h 57m

Perth

Fri 12/6

00:10-23:23

2 stops36h 13m

$3,229

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 6/2

14:45-15:55

3 stops35h 10m

Perth

Sat 13/6

13:15-20:15

3 stops44h 00m

$3,463

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

16:05-14:30

3 stops56h 25m

Perth

Mon 17/11

22:55-15:29

3 stops54h 34m

$4,100

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

16:05-14:30

3 stops56h 25m

Perth

Mon 17/11

22:55-15:29

3 stops54h 34m

$4,102

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 6/2

17:00-14:45

2 stops31h 45m

Perth

Fri 12/6

01:10-15:21

3 stops51h 11m

$4,516

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from St. Louis to Perth

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Perth according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap St. Louis to Perth (STL to PER) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Perth

Direct flights	None

There are no direct flights from St. Louis to Perth. There are no popular flight routes from St. Louis to Perth.

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How far is Lambert-St Louis to Perth by plane?
There are 17533.8 km between Lambert-St Louis and Perth. In terms of flight time, this usually takes a little over 31h 45m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Perth Airport?
Prices for flights from Lambert-St Louis Airport to Perth Airport refresh daily.
How old do you have to be to fly from Lambert-St Louis Airport to Perth Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Perth Airport.
What documentation or ID do you need to fly to Perth Airport?
The travel and health documents required for your trip to Perth Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Perth Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

How do I get Price Alerts for flights from St. Louis to Perth?
Search flight deals from St. Louis to Perth. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from St. Louis to Perth with momondo?
With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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Rottnest Island

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Perth?

It is quick and easy to find St. Louis to Perth flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Perth that suits you.

Can I find flights from St. Louis to Perth with flexible booking policies on momondo?

All flight searches from St. Louis to Perth on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Perth?

momondo helps you find the best flight between St. Louis and Perth by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Perth right now. Can momondo alert me if prices change?

Price alerts on flights to Perth from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.