AirHint found the following cheapest return flights from Cheju (CJU) to Bangkok (BKK) in September 2025 (see full year).

Return flights

25 Sep - 01 Oct	T'way Air
25 Sep - 28 Sep	Jeju Air
25 Sep - 05 Oct	Air Busan
24 Sep - 26 Sep	T'way Air
24 Sep - 01 Oct	T'way Air
23 Sep - 26 Sep	T'way Air
23 Sep - 27 Sep	T'way Air
22 Sep - 24 Sep	T'way Air
28 Sep - 04 Oct	Jeju Air
26 Sep - 30 Sep	T'way Air
26 Sep - 29 Sep	T'way Air
28 Sep - 01 Oct	T'way Air
27 Sep - 04 Oct	Asiana Airlines

Also check the deals for one-way flights from Cheju to Bangkok 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 Cheju to Bangkok in September from 197€

Return flights