AirHint found the following cheapest return flights from Kathmandu (KTM) to Vientiane (VTE) in August 2025 (see full year).

Return flights

20 Aug - 27 Aug	Thai AirAsia
19 Aug - 26 Aug	Thai AirAsia
19 Aug - 25 Aug	Thai AirAsia
18 Aug - 26 Aug	Thai AirAsia
18 Aug - 25 Aug	Thai AirAsia
18 Aug - 27 Aug	Thai AirAsia
19 Aug - 27 Aug	Thai AirAsia
20 Aug - 26 Aug	Thai AirAsia
20 Aug - 25 Aug	Thai AirAsia
18 Aug - 02 Sep	Thai AirAsia
18 Aug - 04 Sep	Thai AirAsia
19 Aug - 02 Sep	Thai AirAsia
19 Aug - 04 Sep	Thai AirAsia
18 Aug - 08 Sep	Thai AirAsia
19 Aug - 08 Sep	Thai AirAsia
20 Aug - 02 Sep	Thai AirAsia
20 Aug - 04 Sep	Thai AirAsia
18 Aug - 20 Aug	Thai AirAsia
20 Aug - 08 Sep	Thai AirAsia
26 Aug - 02 Sep	Thai AirAsia

Also check the deals for one-way flights from Kathmandu 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 Kathmandu to Vientiane in August from 353€

Return flights