AirHint found the following cheapest return flights from Chiang Mai (CNX) to Vientiane (VTE) in September 2025 (see full year).

Return flights

04 Sep - 07 Sep	Thai AirAsia
03 Sep - 07 Sep	Thai AirAsia
03 Sep - 24 Sep	Thai AirAsia
12 Sep - 24 Sep	Thai AirAsia
17 Sep - 24 Sep	Thai AirAsia
04 Sep - 24 Sep	Thai AirAsia
22 Sep - 24 Sep	Thai AirAsia
01 Sep - 07 Sep	Thai AirAsia
13 Sep - 24 Sep	Thai AirAsia
18 Sep - 24 Sep	Thai AirAsia
27 Sep - 15 Oct	Thai AirAsia
27 Sep - 09 Oct	Thai AirAsia
23 Sep - 09 Oct	Thai AirAsia
23 Sep - 08 Oct	Thai AirAsia
27 Sep - 08 Oct	Thai AirAsia
22 Sep - 09 Oct	Thai AirAsia
22 Sep - 08 Oct	Thai AirAsia
17 Sep - 08 Oct	Thai AirAsia
18 Sep - 09 Oct	Thai AirAsia
18 Sep - 08 Oct	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai 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.

Book a cheap hotel in Vientiane

Cheap car rent in Vientiane

Cheapest return flights from Chiang Mai to Vientiane in September from $211

Return flights