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

Return flights

19 Oct - 10 Nov	Air Canada
19 Oct - 23 Oct	Air Canada
19 Oct - 06 Nov	Air Canada
29 Oct - 10 Nov	Air Canada
18 Oct - 21 Oct	Hawaiian Airlines
06 Oct - 08 Oct	Air Canada
02 Oct - 14 Oct	Air Canada
05 Oct - 08 Oct	Air Canada
23 Oct - 10 Nov	Air Canada
06 Oct - 09 Oct	Air Canada
01 Oct - 10 Oct	Air Canada
17 Oct - 22 Oct	Air Canada
23 Oct - 23 Nov	Air Canada
17 Oct - 21 Oct	Air Canada
17 Oct - 20 Oct	Air Canada
30 Oct - 06 Nov	Air Canada
24 Oct - 11 Nov	Air Canada
30 Oct - 10 Nov	Air Canada
31 Oct - 10 Nov	Air Canada
24 Oct - 01 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Washington to Seoul in October from 884€

Return flights