Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to Phnom Penh (PNH)

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 Phnom Penh (PNH)

How to find the cheapest flight from St Louis (STL) to Phnom Penh (PNH)
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 Phnom Penh (PNH)
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 Phnom Penh (PNH)
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 Phnom Penh in August , September 2026

30 Aug - 11 Sep $ 1,416.00
STL
St Louis
Frontier Airlines
3 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
26 Aug - 10 Sep $ 1,652.00
STL
St Louis
Alaska Airlines
2 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Alaska Airlines
2 STOPS
STL
St Louis
Pick dates
23 Aug - 10 Sep $ 1,973.00
STL
St Louis
Alaska Airlines
2 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Alaska Airlines
2 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to Phnom Penh

27 Aug - 02 Sep $ 1,734.00
STL
St Louis
Alaska Airlines
3 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
27 Aug - 02 Sep $ 1,745.00
STL
St Louis
Alaska Airlines
2 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
25 Aug - 02 Sep $ 1,746.00
STL
St Louis
Alaska Airlines
2 STOPS
PNH
Phnom Penh
PNH
Phnom Penh
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates

One-way flights to Phnom Penh from St Louis

6:35 AM - 8:35 AM
Cathay Pacific
2 Stops
39h 40m
STL - PNH
$ 582
Kiwi
Pick dates
6:35 AM - 3:35 PM
Cathay Pacific
2 Stops
46h 40m
STL - PNH
$ 582
Kiwi
Pick dates
7:36 PM - 8:45 AM
EVA Air
2 Stops
27h 39m
STL - PNH
$ 893
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Phnom Penh (PNH)

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 Phnom Penh (PNH)
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 Phnom Penh (PNH)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.