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

Return flights

07 Sep - 11 Sep	Jin Air
05 Sep - 08 Sep	Jeju Air
10 Sep - 14 Sep	Jin Air
26 Sep - 01 Oct	T'way Air
19 Sep - 21 Sep	Jeju Air
26 Sep - 16 Oct	T'way Air
19 Sep - 27 Sep	T'way Air
10 Sep - 30 Sep	T'way Air
20 Sep - 27 Sep	T'way Air
28 Sep - 04 Oct	T'way Air
13 Sep - 20 Sep	T'way Air
05 Sep - 10 Sep	T'way Air
05 Sep - 12 Sep	T'way Air
25 Sep - 01 Oct	T'way Air
26 Sep - 03 Oct	HK Express
10 Sep - 08 Oct	Air China
10 Sep - 09 Oct	HK Express
28 Sep - 07 Oct	Scoot
29 Sep - 10 Oct	HK Express

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 $202

Return flights