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

Return flights

17 Nov - 08 Dec	Air Canada
28 Nov - 03 Dec	Frontier Airlines
17 Nov - 10 Dec	Frontier Airlines
20 Nov - 27 Nov	Southern Airways Express
16 Nov - 10 Dec	Alaska Airlines
19 Nov - 26 Nov	TAP
21 Nov - 24 Nov	Air Canada
20 Nov - 20 Dec	Air Canada
22 Nov - 05 Dec	Emirates
21 Nov - 23 Nov	United
28 Nov - 03 Dec	Delta	direct
19 Nov - 26 Nov	Delta	direct
20 Nov - 27 Nov	Delta	direct
17 Nov - 08 Dec	Delta	direct
18 Nov - 21 Nov	Delta	direct
20 Nov - 20 Dec	Delta	direct
19 Nov - 29 Nov	Delta	direct
21 Nov - 24 Nov	Delta	direct
17 Nov - 24 Nov	Korean Air	direct
17 Nov - 10 Dec	Korean Air	direct

Also check the deals for one-way flights from Washington to Seoul in November.

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 November from 868€

Return flights