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.

$2,100 Cheap Flights from St. Louis to Perth in 2025/26

1 adult

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Find the cheapest flights from St. Louis to Perth

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:42 - 22:55STL-PER

45h 13m2 stops

00:25 - 23:42PER-STL

37h 17m2 stops

$2,100Cathay Pacific

Find Deal

Wed, 5 Nov - Tue, 11 Nov

07:00 - 22:55STL-PER

49h 55m2 stops

08:30 - 16:47PER-STL

46h 17m2 stops

$2,276Cathay Pacific

Find Deal

Thu, 13 Nov - Mon, 17 Nov

07:00 - 06:55STL-PER

33h 55m2 stops

00:25 - 22:58PER-STL

36h 33m2 stops

$2,506Cathay Pacific

Find Deal

Thu, 13 Nov - Sun, 16 Nov

08:39 - 06:55STL-PER

32h 16m2 stops

00:25 - 23:59PER-STL

37h 34m3 stops

$2,704Multiple Airlines

Find Deal

Thu, 13 Nov - Sun, 16 Nov

17:50 - 12:05STL-PER

28h 15m2 stops

10:20 - 23:59PER-STL

27h 39m2 stops

$2,751Qantas Airways

Find Deal

Fri, 28 Nov - Fri, 9 Jan

08:40 - 06:55STL-PER

32h 15m2 stops

00:25 - 23:59PER-STL

61h 34m2 stops

$2,896Cathay Pacific

Find Deal

Fri, 28 Nov - Thu, 8 Jan

17:29 - 21:35STL-PER

38h 06m2 stops

22:55 - 22:22PER-STL

37h 27m3 stops

$3,175Air New Zealand

Find Deal

Wed, 5 Nov - Wed, 12 Nov

06:30 - 16:50STL-PER

44h 20m3 stops

18:50 - 21:54PER-STL

41h 04m3 stops

$3,424Multiple Airlines

Find Deal

Wed, 5 Nov - Wed, 12 Nov

16:05 - 20:20STL-PER

62h 15m3 stops

22:55 - 15:29PER-STL

54h 34m3 stops

$3,677Air Canada

Find Deal

Thu, 13 Nov - Mon, 17 Nov

17:50 - 22:55STL-PER

39h 05m2 stops

00:25 - 22:51PER-STL

36h 26m3 stops

$3,753Multiple Airlines

Find Deal

Fri, 28 Nov - Thu, 8 Jan

Cathay Pacific flights from St. Louis to Perth

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

Cathay Pacific

5 Nov

STL11:42Lambert-St Louis

45h 13m

2 stops

PER22:55Perth

11 Nov

PER00:25Perth

37h 17m

2 stops

STL23:42Lambert-St Louis

$2,100

Find similar

Cathay Pacific

13 Nov

STL07:00Lambert-St Louis

49h 55m

2 stops

PER22:55Perth

17 Nov

PER08:30Perth

46h 17m

2 stops

STL16:47Lambert-St Louis

$2,276

Find similar

Cathay Pacific

13 Nov

STL07:00Lambert-St Louis

33h 55m

2 stops

PER06:55Perth

16 Nov

PER00:25Perth

36h 33m

2 stops

STL22:58Lambert-St Louis

$2,506

Find similar

Qantas Airways flights from St. Louis to Perth

Our best Qantas Airways deals on St. Louis to Perth flight tickets

Qantas Airways

28 Nov

STL17:50Lambert-St Louis

28h 15m

2 stops

PER12:05Perth

9 Jan

PER10:20Perth

27h 39m

2 stops

STL23:59Lambert-St Louis

$2,751

Find similar

Qantas Airways

11 Oct

STL06:39Lambert-St Louis

38h 36m

2 stops

PER10:15Perth

13 Oct

PER22:55Perth

54h 28m

3 stops

STL16:23Lambert-St Louis

$5,815

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 5/11

11:42-22:55

2 stops45h 13m

Perth

Tue 11/11

00:25-23:42

2 stops37h 17m

$2,100

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

07:00-22:55

2 stops49h 55m

Perth

Mon 17/11

08:30-16:47

2 stops46h 17m

$2,276

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

07:00-06:55

2 stops33h 55m

Perth

Sun 16/11

00:25-22:58

2 stops36h 33m

$2,506

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

08:39-06:55

2 stops32h 16m

Perth

Sun 16/11

00:25-23:59

3 stops37h 34m

$2,704

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 28/11

17:50-12:05

2 stops28h 15m

Perth

Fri 9/1

10:20-23:59

2 stops27h 39m

$2,751

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 28/11

08:40-06:55

2 stops32h 15m

Perth

Thu 8/1

00:25-23:59

2 stops61h 34m

$2,896

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 5/11

17:29-21:35

2 stops38h 06m

Perth

Wed 12/11

22:55-22:22

3 stops37h 27m

$3,175

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 5/11

06:30-16:50

3 stops44h 20m

Perth

Wed 12/11

18:50-21:54

3 stops41h 04m

$3,424

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 13/11

16:05-20:20

3 stops62h 15m

Perth

Mon 17/11

22:55-15:29

3 stops54h 34m

$3,677

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 28/11

17:50-22:55

2 stops39h 05m

Perth

Thu 8/1

00:25-22:51

3 stops36h 26m

$3,753

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.

Search flight deals

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 28h 15m.
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.

Fremantle

Mandurah

Scarborough

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.