Which airports can I use when flying from St. Louis to Perth?

Flights from St. Louis to Perth usually depart from Lambert-St Louis (STL) and arrive at Perth (PER).

What cabin classes can I book on flights from St. Louis to Perth?

Only Economy Class is available on flights from St. Louis to Perth.

Can I save money by using flexible dates for flights from St. Louis to Perth?

Yes. Flexible dates can save you up to 36% on flights from St. Louis to Perth. Wednesday is the cheapest departure day at $1,652 round-trip on average, while Monday is the most expensive at $2,572, a difference of $920. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Perth?

Some of the most popular sights in Perth are RAC Arena, Perth Convention Exhibition Centre and 100 St Georges Terrace. These are among the most viewed places in Perth on KAYAK.

Do I need a passport to fly from St. Louis to Perth?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from St. Louis to Perth changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,421 to $6,689. That means the highest observed fare was about 5x higher than the lowest one.

How are flight prices from St. Louis to Perth looking right now?

One-way fares from St. Louis to Perth are currently lower than usual. Average one-way flight prices are about $821, which is 14% below the typical average for this route.

What is the time difference between St. Louis and Perth?

Perth is 13 hours ahead of St. Louis (Western Australia Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Perth Airport (PER)?

Perth Airport (PER) hosts 5 major car rental companies, with daily rates starting from around $12 for economy cars. Top options include: • EverythingFleet • Bargain Car Rentals • East Coast Car Rentals • No Birds • Europcar

How much should I expect to pay for a St. Louis to Perth flight?

Round-trip flights from St. Louis to Perth range from $1,652 to $2,045, with an average of $2,005 over the past 12 months. Anything below $1,652 counts as a good deal.

Which airline is the cheapest to fly from St. Louis to Perth?

Cathay Pacific ($1,513) and United Airlines ($1,737) are the cheapest airlines to fly round-trip from St. Louis to Perth according to KAYAK data over the last 5 days.

$767 CHEAP FLIGHTS from St. Louis to Perth (STL - PER)

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Cheapest round-trip

$1,493

Typical prices: $1,652-$2,045

Multiple Airlines

Fri 11/30Fri 12/7

STL - PER • 2 stops

Cheapest one-way

$767

Typical prices: $774-$1,254

Multiple Airlines

Sat 2/10

STL - PER • 3 stops

When to travel

September

Cheapest • 31% price drop

May

Most popular

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We hope you love your trip to Perth!

Cheap Flights from St. Louis to Perth (STL-PER)

Cheap flights from St. Louis to Perth with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Mon, Nov 30 - Mon, Dec 7

6:55 pm - 6:55 amSTL Lambert-St Louis-PER Perth

46h 00m2 stops Dallas/Fort Worth Hong Kong Intl

8:30 am - 4:47 pmPER Perth-STL Lambert-St Louis

46h 17m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,493Multiple Airlines

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

$1,513Cathay 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

$1,530Cathay 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

Sat, Nov 14 - Fri, Nov 20

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

Sun, Nov 1 - Mon, Nov 16

7:05 pm - 2:45 pmSTL Lambert-St Louis-PER Perth

29h 40m2 stops San Francisco Melbourne

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

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

$1,737United 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

Sat, Nov 28 - Sat, Dec 5

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

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

$1,819United Airlines

Sat, Nov 14 - Sat, Nov 21

7:05 pm - 11:20 amSTL Lambert-St Louis-PER Perth

50h 15m2 stops San Francisco Sydney Kingsford Smith

12:15 pm - 6:05 pmPER Perth-STL Lambert-St Louis

43h 50m3 stops Sydney Kingsford Smith Los Angeles San Francisco

$1,839United Airlines

Price, demand and travel trends for St. Louis to Perth flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Which airline is the cheapest to fly from St. Louis to Perth?: Cathay Pacific ($1,513) and United Airlines ($1,737) are the cheapest airlines to fly round-trip from St. Louis to Perth according to KAYAK data over the last 5 days.

Find deals

Low season	August
Cheapest flight	$767

Beat the crowds with an average 64% drop in travelers.

One-way flight from St. Louis to Perth

When to book flights from St. Louis to Perth

Are your dates flexible? Find out the best times to travel from St. Louis to Perth based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from St. Louis to Perth?
Only Economy Class is available on flights from St. Louis to Perth.
Do I need a passport to fly from St. Louis to Perth?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a St. Louis to Perth flight?
Round-trip flights from St. Louis to Perth range from $1,652 to $2,045, with an average of $2,005 over the past 12 months. Anything below $1,652 counts as a good deal.
Have flight prices from St. Louis to Perth changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,421 to $6,689. That means the highest observed fare was about 5x higher than the lowest one.
How are flight prices from St. Louis to Perth looking right now?
One-way fares from St. Louis to Perth are currently lower than usual. Average one-way flight prices are about $821, which is 14% below the typical average for this route.
What car rental options are available at Perth Airport (PER)?
Perth Airport (PER) hosts 5 major car rental companies, with daily rates starting from around $12 for economy cars. Top options include:

• EverythingFleet
• Bargain Car Rentals
• East Coast Car Rentals
• No Birds
• Europcar
Which airports can I use when flying from St. Louis to Perth?
Flights from St. Louis to Perth usually depart from Lambert-St Louis (STL) and arrive at Perth (PER).
Can I save money by using flexible dates for flights from St. Louis to Perth?
Yes. Flexible dates can save you up to 36% on flights from St. Louis to Perth. Wednesday is the cheapest departure day at $1,652 round-trip on average, while Monday is the most expensive at $2,572, a difference of $920.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between St. Louis and Perth?
Perth is 13 hours ahead of St. Louis (Western Australia Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Perth?
Some of the most popular sights in Perth are RAC Arena, Perth Convention Exhibition Centre and 100 St Georges Terrace. These are among the most viewed places in Perth on KAYAK.

If your dates are flexible, aim for a Wednesday departure and avoid flying on Monday. On this route, Wednesday flights average $1,652, about $920 less than Monday fares (36% savings) based on the last 12 months.
If you can choose when to travel, plan your St. Louis to Perth trip for September. Fares historically average $1,385 round-trip in that month - typically $1,187 less than the most expensive month, which is June (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Perth Airport.

• Sanno Marracoonda Perth Airport Hotel

More options for your flight from St. Louis to Perth

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Everything you should know

Cheap Flights from St. Louis to Perth (STL-PER)

Cheap flights from St. Louis to Perth with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Price, demand and travel trends for St. Louis to Perth flights

Which airline is the cheapest to fly from St. Louis to Perth?

Key details for St. Louis to Perth flights

Low season

Cheapest flight

When to book flights from St. Louis to Perth

Your St. Louis to Perth flight questions, answered

Your guide to booking St. Louis to Perth flights

More options for your flight from St. Louis to Perth

Complete your trip to Perth with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from St. Louis to Perth

Find direct flights to and from St. Louis and Perth

Flights from domestic origins to Perth

Flights to other popular destinations