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

Return flights

06 Oct - 29 Oct	Delta
20 Oct - 27 Oct	Delta
20 Oct - 29 Oct	Delta
03 Oct - 13 Oct	Delta
05 Oct - 08 Oct	Delta
05 Oct - 03 Nov	Delta
27 Oct - 03 Nov	Delta
23 Oct - 06 Nov	Delta
05 Oct - 18 Oct	Delta
13 Oct - 26 Oct	Delta
15 Oct - 20 Oct	Delta
02 Oct - 18 Oct	Delta
17 Oct - 20 Oct	Delta

Also check the deals for one-way flights from Dallas 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 Dallas to Seoul in October from 979€

Return flights