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.

$1,493 Cheap Flights from St. Louis to Perth in 2026/27

Find the cheapest flights from St. Louis to Perth

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 6:55 amSTL Lambert-St Louis-PER Perth

34h 55m2 stops Los Angeles Hong Kong Intl

12:25 am - 8:40 pmPER Perth-STL Lambert-St Louis

34h 15m2 stops Hong Kong Intl Los Angeles

$1,493Multiple Airlines

Thu, Nov 26 - Wed, Dec 2

8:15 pm - 10:55 pmSTL Lambert-St Louis-PER Perth

60h 40m2 stops Chicago O'Hare Intl Hong Kong Intl

8:30 am - 4:43 pmPER Perth-STL Lambert-St Louis

46h 13m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,530Cathay Pacific

Sun, Nov 1 - Mon, Nov 16

8:15 pm - 10:55 pmSTL Lambert-St Louis-PER Perth

60h 40m2 stops Chicago O'Hare Intl Hong Kong Intl

8:30 am - 4:43 pmPER Perth-STL Lambert-St Louis

46h 13m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,531Cathay Pacific

Sun, Nov 1 - Mon, Nov 16

10:21 am - 10:55 pmSTL Lambert-St Louis-PER Perth

46h 34m2 stops Dallas/Fort Worth Hong Kong Intl

8:30 am - 6:17 pmPER Perth-STL Lambert-St Louis

47h 47m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,543Multiple Airlines

Sun, Nov 1 - Mon, Nov 16

8:10 am - 10:55 pmSTL Lambert-St Louis-PER Perth

48h 45m2 stops Los Angeles Hong Kong Intl

12:25 am - 11:59 pmPER Perth-STL Lambert-St Louis

37h 34m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,609Multiple Airlines

Sat, Nov 14 - Fri, Nov 20

7:05 pm - 2:30 pmSTL Lambert-St Louis-PER Perth

29h 25m2 stops San Francisco Sydney Kingsford Smith

3:15 pm - 6:05 pmPER Perth-STL Lambert-St Louis

40h 50m3 stops Sydney Kingsford Smith Los Angeles San Francisco

$1,639United Airlines

Sun, Nov 1 - Mon, Nov 16

7:05 pm - 2:30 pmSTL Lambert-St Louis-PER Perth

29h 25m2 stops San Francisco Sydney Kingsford Smith

3:15 pm - 6:05 pmPER Perth-STL Lambert-St Louis

40h 50m3 stops Sydney Kingsford Smith Los Angeles San Francisco

$1,739United Airlines

Sun, Nov 1 - Mon, Nov 16

6:00 am - 10:20 pmSTL Lambert-St Louis-PER Perth

50h 20m3 stops Chicago O'Hare Intl Los Angeles Auckland Intl

11:50 pm - 6:41 pmPER Perth-STL Lambert-St Louis

32h 51m2 stops Auckland Intl Houston George Bush Intcntl

$1,740Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

6:00 am - 10:20 pmSTL Lambert-St Louis-PER Perth

50h 20m3 stops Chicago O'Hare Intl Los Angeles Auckland Intl

11:50 pm - 10:59 pmPER Perth-STL Lambert-St Louis

37h 09m3 stops Auckland Intl Los Angeles Chicago O'Hare Intl

$1,745Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

6:55 pm - 4:00 pmSTL Lambert-St Louis-PER Perth

31h 05m2 stops Dallas/Fort Worth Brisbane

10:55 pm - 6:26 pmPER Perth-STL Lambert-St Louis

33h 31m2 stops Sydney Kingsford Smith Dallas/Fort Worth

$1,780Qantas Airways

Sat, Nov 28 - Sat, Dec 5

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Cathay Pacific flights from St. Louis to Perth

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

Cathay Pacific

Nov 1

STL8:15 pmLambert-St Louis

60h 40m

2 stops

PER10:55 pmPerth

Nov 16

PER8:30 amPerth

46h 13m

2 stops

STL4:43 pmLambert-St Louis

$1,530

Cathay Pacific

Nov 1

STL8:15 pmLambert-St Louis

60h 40m

2 stops

PER10:55 pmPerth

Nov 16

PER8:30 amPerth

46h 13m

2 stops

STL4:43 pmLambert-St Louis

$1,531

Air Canada flights from St. Louis to Perth

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

Air Canada

Nov 9

STL4:05 pmLambert-St Louis

56h 25m

3 stops

PER2:30 pmPerth

Nov 13

PER10:55 pmPerth

54h 31m

3 stops

STL3:26 pmLambert-St Louis

$2,120

Air Canada

Nov 1

STL4:05 pmLambert-St Louis

56h 25m

3 stops

PER2:30 pmPerth

Nov 16

PER3:15 pmPerth

62h 11m

3 stops

STL3:26 pmLambert-St Louis

$2,630

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Thu 11/26

6:00 am-6:55 am

2 stops34h 55m

Perth

Wed 12/2

12:25 am-8:40 pm

2 stops34h 15m

$1,493

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

8:15 pm-10:55 pm

2 stops60h 40m

Perth

Mon 11/16

8:30 am-4:43 pm

2 stops46h 13m

$1,530

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

8:15 pm-10:55 pm

2 stops60h 40m

Perth

Mon 11/16

8:30 am-4:43 pm

2 stops46h 13m

$1,531

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

10:21 am-10:55 pm

2 stops46h 34m

Perth

Mon 11/16

8:30 am-6:17 pm

2 stops47h 47m

$1,543

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sat 11/14

8:10 am-10:55 pm

2 stops48h 45m

Perth

Fri 11/20

12:25 am-11:59 pm

2 stops37h 34m

$1,609

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

7:05 pm-2:30 pm

2 stops29h 25m

Perth

Mon 11/16

3:15 pm-6:05 pm

3 stops40h 50m

$1,639

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

7:05 pm-2:30 pm

2 stops29h 25m

Perth

Mon 11/16

3:15 pm-6:05 pm

3 stops40h 50m

$1,739

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Thu 11/26

6:00 am-10:20 pm

3 stops50h 20m

Perth

Thu 12/3

11:50 pm-6:41 pm

2 stops32h 51m

$1,740

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Thu 11/26

6:00 am-10:20 pm

3 stops50h 20m

Perth

Thu 12/3

11:50 pm-10:59 pm

3 stops37h 09m

$1,745

Quickest round-trip

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sat 11/28

6:55 pm-4:00 pm

2 stops31h 05m

Perth

Sat 12/5

10:55 pm-6:26 pm

2 stops33h 31m

$1,780

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

Best Price Found	$1,493
Fastest flight time	34h 54m
Direct flights	None

The best flight deal from St. Louis to Perth found on momondo in the last 72 hours is $1,493

The fastest flight from St. Louis to Perth takes 34h 54m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Perth

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 34h 54m.
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.

Frequently asked questions about flying from St. Louis to Perth

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.

Fremantle

Mandurah

Rottnest Island

Scarborough

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.