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

Return flights

13 Aug - 20 Aug	Thai AirAsia
17 Aug - 29 Aug	Thai AirAsia
27 Aug - 29 Aug	Thai AirAsia
26 Aug - 29 Aug	Thai AirAsia
27 Aug - 15 Sep	Thai AirAsia
26 Aug - 15 Sep	Thai AirAsia
30 Aug - 15 Sep	Thai AirAsia
07 Aug - 29 Aug	Thai VietJet Air
17 Aug - 26 Aug	Thai AirAsia
17 Aug - 28 Aug	Thai AirAsia
26 Aug - 28 Aug	Thai AirAsia
08 Aug - 15 Aug	Thai AirAsia
28 Aug - 15 Sep	Thai AirAsia
27 Aug - 14 Sep	Thai AirAsia
26 Aug - 14 Sep	Thai AirAsia
30 Aug - 14 Sep	Thai AirAsia
28 Aug - 14 Sep	Thai AirAsia
11 Aug - 18 Aug	Thai AirAsia
17 Aug - 01 Sep	Thai AirAsia
27 Aug - 01 Sep	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 235€

Return flights