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

Return flights

24 Oct - 31 Oct	jetBlue
03 Oct - 19 Oct	Air Canada
23 Oct - 27 Oct	Air Canada
20 Oct - 27 Oct	Air Canada
25 Oct - 31 Oct	jetBlue
04 Oct - 19 Oct	Air Canada
22 Oct - 30 Oct	Air Canada
15 Oct - 22 Oct	Air Canada
22 Oct - 29 Oct	Air Canada
27 Oct - 13 Nov	Air Canada
02 Oct - 04 Oct	Air Canada
28 Oct - 02 Nov	Air Canada
17 Oct - 04 Nov	Air Canada
29 Oct - 08 Nov	Air Canada
20 Oct - 20 Nov	Cathay Pacific
31 Oct - 28 Nov	Air Canada
15 Oct - 18 Nov	Cathay Pacific
14 Oct - 20 Nov	Air Canada
13 Oct - 20 Nov	Cathay Pacific
31 Oct - 02 Nov	Air Canada

Also check the deals for one-way flights from Washington 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 Washington to Seoul in October from $978

Return flights