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

Return flights

15 Dec - 16 Dec	Thai AirAsia
12 Dec - 15 Dec	Thai AirAsia
12 Dec - 16 Dec	Thai AirAsia
14 Dec - 15 Dec	Thai AirAsia
14 Dec - 16 Dec	Thai AirAsia
15 Dec - 25 Dec	Thai AirAsia
15 Dec - 30 Dec	Thai AirAsia
15 Dec - 29 Dec	Thai AirAsia
15 Dec - 02 Jan	Thai AirAsia
15 Dec - 21 Dec	Thai AirAsia
12 Dec - 25 Dec	Thai AirAsia
14 Dec - 02 Jan	Thai AirAsia
21 Dec - 02 Jan	Thai AirAsia

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

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 Vientiane to Phnom-penh in December from $295

Return flights