Cheapest return flights from Phnom-penh to Vientiane in September from $281

AirHint found the following cheapest return flights from Phnom-penh (PNH) to Vientiane (VTE) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep Air Cambodia
01 Sep - 18 Sep Thai AirAsia
25 Sep - 05 Oct Thai AirAsia
02 Sep - 18 Sep Thai AirAsia
03 Sep - 18 Sep Thai AirAsia
01 Sep - 12 Sep Thai AirAsia
01 Sep - 10 Sep Thai AirAsia
02 Sep - 12 Sep Thai AirAsia
03 Sep - 12 Sep Thai AirAsia
02 Sep - 10 Sep Thai AirAsia
28 Sep - 05 Oct Thai AirAsia
25 Sep - 10 Oct Thai AirAsia
28 Sep - 10 Oct Thai AirAsia
03 Sep - 10 Sep Vietnam Airlines direct

Also check the deals for one-way flights from Phnom-penh to Vientiane in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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