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

One-Way flights

06 Apr	Vietnam Airlines
17 Apr	Vietnam Airlines
24 Apr	Vietnam Airlines
02 Apr	Vietnam Airlines
24 Apr	Thai AirAsia X	direct
21 Apr	Thai AirAsia X	direct
25 Apr	Thai AirAsia X	direct
22 Apr	Thai AirAsia X	direct
02 Apr	Thai AirAsia X	direct
01 Apr	Thai AirAsia X	direct

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

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 Bangkok

Cheap car rent in Bangkok

Cheapest one-way flights from Seoul to Bangkok in April from 66€

One-Way flights