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

One-Way flights

15 Dec	Thai AirAsia
16 Dec	Thai AirAsia
20 Dec	Air Cambodia
07 Dec	Air Cambodia
21 Dec	Thai VietJet Air
20 Dec	Vietnam Airlines	direct
07 Dec	Vietnam Airlines	direct
22 Dec	Vietnam Airlines
28 Dec	Vietnam Airlines	direct
15 Dec	Vietnam Airlines	direct

Also check the deals for return flights from Phnom-penh to Vientiane 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 one-way flights from Phnom-penh to Vientiane in December from 119€

One-Way flights