AirHint found the following cheapest return flights from Seoul (ICN) to Phuket (HKT) in September 2025 (see full year).

Return flights

20 Sep - 28 Sep	Jeju Air
20 Sep - 27 Sep	Jeju Air
23 Sep - 05 Oct	AirAsia X
22 Sep - 26 Sep	Scoot
22 Sep - 25 Sep	Eastar Jet
24 Sep - 30 Sep	Scoot
24 Sep - 03 Oct	Scoot
26 Sep - 03 Oct	Thai AirAsia X
24 Sep - 05 Oct	AirAsia X
30 Sep - 05 Oct	Jin Air	direct
23 Sep - 28 Sep	Eastar Jet
29 Sep - 05 Oct	Thai AirAsia X
21 Sep - 05 Oct	Thai AirAsia X
28 Sep - 02 Oct	Jeju Air
27 Sep - 30 Sep	Eastar Jet
17 Sep - 05 Oct	Thai AirAsia X
22 Sep - 05 Oct	Thai AirAsia X
20 Sep - 30 Sep	Scoot
20 Sep - 23 Sep	Scoot
27 Sep - 30 Sep	Asiana Airlines	direct

Also check the deals for one-way flights from Seoul to Phuket 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 Seoul to Phuket in September from $170

Return flights