AirHint found the following cheapest one-way flights from Seoul (ICN) to Bangkok (BKK) in May 2026 (see full year).

One-Way flights

06 May	Korean Air	direct
07 May	Thai AirAsia X	direct
19 May	Thai AirAsia X	direct
02 May	Thai AirAsia X	direct
16 May	Thai AirAsia X	direct
20 May	Thai AirAsia X	direct
01 May	Cebu Pacific
21 May	Thai AirAsia X	direct
01 May	Thai AirAsia X	direct
30 May	Scoot Tigerair

Also check the deals for return flights from Seoul to Bangkok in May.

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 Seoul to Bangkok in May from $184

One-Way flights