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.

$1,522 Cheap Flights from St. Louis to Perth in 2026

1 adult

0 bags

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Find the cheapest flights from St. Louis to Perth

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 4:50 pm

STL

PER

44h 50m2 stops

6:50 pm - 10:14 pm

PER

STL

41h 24m2 stops

$1,522Air New Zealand

Sun, Feb 22 - Sun, Mar 1

7:00 am - 11:55 am

STL

PER

38h 55m2 stops

3:55 pm - 2:23 pm

PER

STL

60h 28m2 stops

$1,547Qatar Airways

Fri, Feb 20 - Fri, Feb 27

6:50 pm - 10:55 pm

STL

PER

38h 05m2 stops

8:30 am - 5:58 pm

PER

STL

46h 28m2 stops

$1,768Cathay Pacific

Thu, Mar 5 - Mon, Mar 9

10:37 am - 10:55 pm

STL

PER

46h 18m2 stops

8:30 am - 5:58 pm

PER

STL

46h 28m2 stops

$1,769Cathay Pacific

Thu, Mar 5 - Mon, Mar 9

8:17 am - 4:50 pm

STL

PER

42h 33m3 stops

6:50 pm - 9:05 pm

PER

STL

40h 15m3 stops

$1,864Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

4:13 pm - 9:15 pm

STL

PER

39h 02m2 stops

8:00 am - 3:28 pm

PER

STL

45h 28m3 stops

$1,870Qantas Airways

Sun, Feb 22 - Sun, Mar 1

5:25 pm - 2:45 pm

STL

PER

31h 20m2 stops

11:45 pm - 4:27 pm

PER

STL

30h 42m2 stops

$2,192United Airlines

Fri, Feb 20 - Fri, Feb 27

8:41 am - 4:50 pm

STL

PER

42h 09m3 stops

6:50 pm - 8:26 pm

PER

STL

39h 36m3 stops

$2,212Multiple Airlines

Fri, Feb 20 - Fri, Feb 27

6:50 pm - 12:05 pm

STL

PER

27h 15m2 stops

8:00 am - 10:58 pm

PER

STL

28h 58m3 stops

$2,288Multiple Airlines

Fri, Feb 20 - Fri, Feb 27

4:05 pm - 2:30 pm

STL

PER

56h 25m3 stops

10:55 pm - 3:29 pm

PER

STL

53h 34m3 stops

$2,781Air Canada

Thu, Mar 5 - Mon, Mar 9

Cathay Pacific flights from St. Louis to Perth

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

Cathay Pacific

Mar 5

STL6:50 pmLambert-St Louis

38h 05m

2 stops

PER10:55 pmPerth

Mar 9

PER8:30 amPerth

46h 28m

2 stops

STL5:58 pmLambert-St Louis

$1,768

Cathay Pacific

Mar 5

STL10:37 amLambert-St Louis

46h 18m

2 stops

PER10:55 pmPerth

Mar 9

PER8:30 amPerth

46h 28m

2 stops

STL5:58 pmLambert-St Louis

$1,769

Air Canada flights from St. Louis to Perth

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

Air Canada

Mar 5

STL4:05 pmLambert-St Louis

56h 25m

3 stops

PER2:30 pmPerth

Mar 9

PER10:55 pmPerth

53h 34m

3 stops

STL3:29 pmLambert-St Louis

$2,781

Air Canada

Mar 5

STL4:05 pmLambert-St Louis

56h 25m

3 stops

PER2:30 pmPerth

Mar 9

PER10:55 pmPerth

53h 34m

3 stops

STL3:29 pmLambert-St Louis

$2,782

Air Canada

Feb 20

STL4:05 pmLambert-St Louis

56h 25m

3 stops

PER2:30 pmPerth

Feb 27

PER10:55 pmPerth

54h 34m

3 stops

STL3:29 pmLambert-St Louis

$2,848

Fly from

Fly to

Route

Depart

Return

Price

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 2/22

6:00 am-4:50 pm

2 stops44h 50m

Perth

Sun 3/1

6:50 pm-10:14 pm

2 stops41h 24m

$1,522

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 2/20

7:00 am-11:55 am

2 stops38h 55m

Perth

Fri 2/27

3:55 pm-2:23 pm

2 stops60h 28m

$1,547

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 3/5

6:50 pm-10:55 pm

2 stops38h 05m

Perth

Mon 3/9

8:30 am-5:58 pm

2 stops46h 28m

$1,768

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 3/5

10:37 am-10:55 pm

2 stops46h 18m

Perth

Mon 3/9

8:30 am-5:58 pm

2 stops46h 28m

$1,769

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 2/22

8:17 am-4:50 pm

3 stops42h 33m

Perth

Sun 3/1

6:50 pm-9:05 pm

3 stops40h 15m

$1,864

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Sun 2/22

4:13 pm-9:15 pm

2 stops39h 02m

Perth

Sun 3/1

8:00 am-3:28 pm

3 stops45h 28m

$1,870

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 2/20

5:25 pm-2:45 pm

2 stops31h 20m

Perth

Fri 2/27

11:45 pm-4:27 pm

2 stops30h 42m

$2,192

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 2/20

8:41 am-4:50 pm

3 stops42h 09m

Perth

Fri 2/27

6:50 pm-8:26 pm

3 stops39h 36m

$2,212

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Fri 2/20

6:50 pm-12:05 pm

2 stops27h 15m

Perth

Fri 2/27

8:00 am-10:58 pm

3 stops28h 58m

$2,288

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Thu 3/5

4:05 pm-2:30 pm

3 stops56h 25m

Perth

Mon 3/9

10:55 pm-3:29 pm

3 stops53h 34m

$2,781

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	38h 05m
Direct flights	None

The fastest flight from St. Louis to Perth takes 38h 05m

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 38h 05m.
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.

Mandurah

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.