AirHint found the following cheapest return flights from Seoul (GMP) to Barcelona (BCN) in October 2025 (see full year).

Return flights

24 Oct - 28 Oct	Air China
19 Oct - 28 Oct	Air China
21 Oct - 28 Oct	Air China
20 Oct - 26 Oct	Air China
23 Oct - 26 Oct	Air China
29 Oct - 31 Oct	Air China
11 Oct - 28 Oct	Air China
14 Oct - 24 Oct	Air China
15 Oct - 24 Oct	Air China
14 Oct - 22 Oct	Air China
21 Oct - 04 Nov	Air China
24 Oct - 01 Nov	Air China
21 Oct - 01 Nov	Air China
18 Oct - 01 Nov	Air China
27 Oct - 09 Nov	Air China
24 Oct - 04 Nov	Air China
01 Oct - 01 Nov	Air China
20 Oct - 01 Nov	Air China
28 Oct - 04 Nov	Japan Airlines
28 Oct - 06 Nov	EVA Air

Also check the deals for one-way flights from Seoul to Barcelona 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 Seoul to Barcelona in October from $678

Return flights