AirHint found the following cheapest return flights from San Diego (SAN) to Seoul (ICN) in October 2025 (see full year).

Return flights

02 Oct - 17 Oct	Spirit Airlines
22 Oct - 02 Nov	Hawaiian Airlines
31 Oct - 06 Nov	Frontier Airlines
22 Oct - 12 Nov	Hawaiian Airlines
14 Oct - 23 Oct	Hawaiian Airlines
28 Oct - 04 Nov	Hawaiian Airlines
05 Oct - 16 Oct	Delta
26 Oct - 31 Oct	American Airlines
06 Oct - 23 Oct	Delta
05 Oct - 23 Oct	United
21 Oct - 28 Oct	American Airlines
31 Oct - 15 Nov	Delta
07 Oct - 22 Oct	Delta
07 Oct - 26 Oct	Delta
31 Oct - 01 Nov	Hawaiian Airlines

Also check the deals for one-way flights from San Diego to Seoul in October.

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 San Diego to Seoul in October from $721

Return flights