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

Return flights

28 Aug - 31 Aug	Thai AirAsia
27 Aug - 29 Aug	Thai VietJet Air
21 Aug - 28 Aug	Thai AirAsia
28 Aug - 07 Sep	Thai AirAsia
28 Aug - 05 Sep	Thai AirAsia
28 Aug - 08 Sep	Thai AirAsia
28 Aug - 01 Sep	Thai AirAsia
30 Aug - 07 Sep	Thai AirAsia
30 Aug - 05 Sep	Thai AirAsia
30 Aug - 08 Sep	Thai AirAsia
30 Aug - 01 Sep	Thai AirAsia
28 Aug - 30 Aug	Thai AirAsia
28 Aug - 03 Sep	Thai AirAsia
30 Aug - 03 Sep	Thai AirAsia
29 Aug - 30 Aug	Thai AirAsia
21 Aug - 26 Aug	Thai AirAsia
21 Aug - 30 Aug	Thai AirAsia
21 Aug - 27 Aug	Thai AirAsia
21 Aug - 29 Aug	Thai AirAsia
21 Aug - 31 Aug	Thai AirAsia

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

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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Cheapest return flights from Phnom-penh to Vientiane in August from 234€

Return flights