AirHint found the following cheapest return flights from Seoul (ICN) to Vientiane (VTE) in March 2026 (see full year).

Return flights

22 Mar - 29 Mar	China Southern
06 Mar - 14 Mar	China Southern
11 Mar - 16 Mar	China Southern
28 Mar - 04 Apr	China Southern
22 Mar - 26 Mar	Jeju Air	direct
11 Mar - 16 Mar	Jeju Air	direct
22 Mar - 29 Mar	Jeju Air	direct
06 Mar - 14 Mar	Jeju Air	direct
11 Mar - 29 Mar	AirAsia X
11 Mar - 14 Mar	AirAsia X
11 Mar - 26 Mar	AirAsia X
22 Mar - 04 Apr	Lao Airlines
28 Mar - 03 Apr	Lao Airlines
22 Mar - 03 Apr	Lao Airlines
28 Mar - 13 Apr	Lao Airlines
28 Mar - 16 Apr	Lao Airlines

Also check the deals for one-way flights from Seoul to Vientiane in March.

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 Seoul to Vientiane in March from 280€

Return flights