AirHint found the following cheapest one-way flights from Bangkok (BKK) to Vientiane (VTE) in September 2025 (see full year).

One-Way flights

15 Sep	Thai AirAsia	direct
14 Sep	Thai AirAsia	direct
30 Sep	Thai AirAsia	direct
09 Sep	Thai AirAsia	direct
25 Sep	Thai AirAsia	direct
01 Sep	Thai AirAsia	direct
02 Sep	Thai AirAsia	direct
03 Sep	Thai AirAsia	direct
23 Sep	Thai AirAsia	direct
10 Sep	Thai AirAsia	direct

Also check the deals for return flights from Bangkok to Vientiane in September.

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 Bangkok to Vientiane in September from 63€

One-Way flights