Cheapest return flights from Washington to Seoul in December from $1643

Best time to book flights for Washington (IAD) to Seoul (ICN) flights at AirHint

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

Return flights

24 Dec - 28 Dec TAP
18 Dec - 31 Dec Air Canada
21 Dec - 30 Dec Air Canada
21 Dec - 01 Jan Lufthansa
20 Dec - 03 Jan Air Canada
22 Dec - 02 Jan Delta
27 Dec - 04 Jan Air France
24 Dec - 28 Dec Korean Air direct
21 Dec - 30 Dec Korean Air direct
18 Dec - 31 Dec Korean Air direct
22 Dec - 02 Jan Korean Air direct
21 Dec - 01 Jan Korean Air direct
20 Dec - 03 Jan Korean Air direct

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

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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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