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

You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Perth . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

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

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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 are refreshed on a daily basis.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 you'll need for your trip to Perth Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Perth Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$1,525 Cheap Flights from St. Louis to Perth in 2026

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0 bags

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Find the cheapest flights from St. Louis to Perth

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:38 pm - 12:15 pm

STL

PER

31h 37m

2 stops

6:15 am - 7:30 pm

PER

STL

26h 15m

2 stops

$1,525Qantas Airways

Sat, May 9 - Sat, May 16

3:50 pm - 6:35 pm

STL

PER

61h 45m

2 stops

3:40 pm - 11:59 pm

PER

STL

45h 19m

2 stops

$1,566Multiple Airlines

Wed, Apr 8 - Wed, Apr 15

5:18 pm - 12:15 pm

STL

PER

29h 57m

2 stops

11:45 pm - 6:30 pm

PER

STL

31h 45m

2 stops

$1,586Qantas Airways

Sat, Jul 4 - Fri, Jul 10

4:20 pm - 6:50 am

STL

PER

49h 30m

2 stops

12:10 am - 10:59 pm

PER

STL

35h 49m

2 stops

$1,587Multiple Airlines

Mon, Apr 6 - Sun, Apr 12

5:18 pm - 3:15 pm

STL

PER

32h 57m

2 stops

11:45 pm - 11:59 pm

PER

STL

37h 14m

2 stops

$1,606Qantas Airways

Sat, Jul 4 - Sun, Jul 12

7:00 am - 11:55 am

STL

PER

39h 55m

2 stops

11:45 pm - 11:57 pm

PER

STL

37h 12m

2 stops

$1,632Multiple Airlines

Mon, Apr 6 - Mon, Apr 13

5:18 pm - 1:45 pm

STL

PER

31h 27m

2 stops

9:05 am - 4:33 pm

PER

STL

44h 28m

2 stops

$1,700Qantas Airways

Sat, Jul 4 - Tue, Jul 14

7:20 pm - 5:00 pm

STL

PER

32h 40m

2 stops

6:15 am - 6:30 pm

PER

STL

25h 15m

2 stops

$1,711Qantas Airways

Thu, Jul 2 - Sat, Jul 11

6:36 am - 10:45 pm

STL

PER

51h 09m

2 stops

6:15 am - 6:30 pm

PER

STL

25h 15m

2 stops

$1,713Qantas Airways

Wed, Jul 8 - Sat, Jul 11

2:40 pm - 3:45 pm

STL

PER

36h 05m

2 stops

11:55 pm - 2:02 pm

PER

STL

51h 07m

2 stops

$1,739Multiple Airlines

Mon, Jul 6 - Fri, Jul 10

Qantas Airways flights from St. Louis to Perth

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

Qantas Airways

May 9

STL3:38 pmLambert-St Louis

31h 37m

2 stops

PER12:15 pmPerth

May 16

PER6:15 amPerth

26h 15m

2 stops

STL7:30 pmLambert-St Louis

$1,525

Qantas Airways

Feb 28

STL6:38 amLambert-St Louis

44h 07m

2 stops

PER4:45 pmPerth

Mar 4

PER10:40 pmPerth

39h 19m

2 stops

STL11:59 pmLambert-St Louis

$1,576

Qantas Airways

Feb 28

STL6:38 amLambert-St Louis

45h 37m

2 stops

PER6:15 pmPerth

Mar 4

PER10:40 pmPerth

39h 19m

2 stops

STL11:59 pmLambert-St Louis

$1,577

Air New Zealand flights from St. Louis to Perth

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

Air New Zealand

May 9

STL4:44 pmLambert-St Louis

34h 16m

2 stops

PER4:00 pmPerth

May 16

PER4:25 pmPerth

37h 14m

3 stops

STL4:39 pmLambert-St Louis

$1,782

Air New Zealand

Jul 5

STL7:23 pmLambert-St Louis

28h 07m

2 stops

PER12:30 pmPerth

Jul 10

PER11:45 pmPerth

31h 32m

2 stops

STL6:17 pmLambert-St Louis

$1,952

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 5/9

3:38 pm-12:15 pm

2 stops31h 37m

Perth

Sat 5/16

6:15 am-7:30 pm

2 stops26h 15m

$1,525

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 4/8

3:50 pm-6:35 pm

2 stops61h 45m

Perth

Wed 4/15

3:40 pm-11:59 pm

2 stops45h 19m

$1,566

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 7/4

5:18 pm-12:15 pm

2 stops29h 57m

Perth

Fri 7/10

11:45 pm-6:30 pm

2 stops31h 45m

$1,586

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 4/6

4:20 pm-6:50 am

2 stops49h 30m

Perth

Sun 4/12

12:10 am-10:59 pm

2 stops35h 49m

$1,587

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 7/4

5:18 pm-3:15 pm

2 stops32h 57m

Perth

Sun 7/12

11:45 pm-11:59 pm

2 stops37h 14m

$1,606

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 4/6

7:00 am-11:55 am

2 stops39h 55m

Perth

Mon 4/13

11:45 pm-11:57 pm

2 stops37h 12m

$1,632

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sat 7/4

5:18 pm-1:45 pm

2 stops31h 27m

Perth

Tue 7/14

9:05 am-4:33 pm

2 stops44h 28m

$1,700

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 7/2

7:20 pm-5:00 pm

2 stops32h 40m

Perth

Sat 7/11

6:15 am-6:30 pm

2 stops25h 15m

$1,711

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Wed 7/8

6:36 am-10:45 pm

2 stops51h 09m

Perth

Sat 7/11

6:15 am-6:30 pm

2 stops25h 15m

$1,713

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Mon 7/6

2:40 pm-3:45 pm

2 stops36h 05m

Perth

Fri 7/10

11:55 pm-2:02 pm

2 stops51h 07m

$1,739

Flights are sorted by cheapest round-trip 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 round-trip 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

Fastest flight time	31h 37m
Direct flights	None

The fastest flight from St. Louis to Perth takes 31h 37m

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?
Lambert-St Louis and Perth are 10895.1 mi apart from one another. By plane, this route typically takes 31h 37m.
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 are refreshed on a daily basis.
How old do you have to be to fly from Lambert-St Louis Airport to Perth Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 you'll need for your trip to Perth Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Perth Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from St. Louis to Perth?
You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Perth. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from St. Louis to Perth with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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Fremantle

Rottnest Island

Scarborough

Waikiki

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Perth from St. Louis.

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

Yes. momondo enables you to select and highlight flights to Perth from St. Louis with this policy.

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

Once you have performed a search for St. Louis to Perth flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of St. Louis to Perth flights. All you need is a valid email address and we will do the rest; it is that quick and easy.