Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to Perth (PER)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from St Louis (STL) to Perth (PER)

How to find the cheapest flight from St Louis (STL) to Perth (PER)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Perth (PER)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Perth (PER)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from St Louis to Perth in April , May 2026

27 Apr - 20 May $ 1,722.00
STL
St Louis
Alaska Airlines
3 STOPS
PER
Perth
PER
Perth
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
11 Apr - 04 May $ 2,578.00
STL
St Louis
Qantas
2 STOPS
PER
Perth
PER
Perth
Qantas
2 STOPS
STL
St Louis
Pick dates
11 Apr - 03 May $ 2,617.00
STL
St Louis
Qantas
2 STOPS
PER
Perth
PER
Perth
Qantas
2 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to Perth

27 Apr - 01 May $ 2,114.00
STL
St Louis
Alaska Airlines
3 STOPS
PER
Perth
PER
Perth
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
27 Apr - 02 May $ 2,152.00
STL
St Louis
Frontier Airlines
3 STOPS
PER
Perth
PER
Perth
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
27 Apr - 01 May $ 2,240.00
STL
St Louis
Frontier Airlines
3 STOPS
PER
Perth
PER
Perth
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates

One-way flights to Perth from St Louis

3:21 PM - 2:15 PM
AirAsia
3 Stops
39h 29m
STL - PER
$ 853
Kiwi
Pick dates
6:21 AM - 9:05 AM
Qantas
2 Stops
39h 54m
STL - PER
$ 1,188
Kiwi
Pick dates
3:38 PM - 6:40 AM
Qantas
2 Stops
28h 12m
STL - PER
$ 1,189
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Perth (PER)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Perth (PER)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Perth (PER)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.