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

Return flights

02 Sep - 07 Sep	Thai AirAsia
20 Sep - 30 Sep	Thai AirAsia
20 Sep - 28 Sep	Thai AirAsia
25 Sep - 30 Sep	Thai AirAsia
25 Sep - 28 Sep	Thai AirAsia
26 Sep - 30 Sep	Thai AirAsia
26 Sep - 28 Sep	Thai AirAsia

Also check the deals for one-way flights from Kolkata 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 return flights from Kolkata to Vientiane in September from $353

Return flights