AirHint found the following cheapest return flights from Washington (IAD) to Seoul (GMP) in January 2026 (see full year).

Return flights

12 Jan - 19 Jan	Air Canada
27 Jan - 03 Feb	Air China
22 Jan - 04 Feb	ANA
27 Jan - 06 Feb	Air China
29 Jan - 05 Feb	ANA
31 Jan - 18 Feb	ANA
28 Jan - 27 Feb	ANA
27 Jan - 27 Feb	ANA
23 Jan - 02 Feb	ANA
23 Jan - 04 Feb	ANA
16 Jan - 28 Jan	Air China
14 Jan - 21 Jan	ANA
09 Jan - 16 Jan	Air China
20 Jan - 31 Jan	ANA
08 Jan - 29 Jan	ANA
08 Jan - 27 Jan	ANA
05 Jan - 13 Jan	ANA
19 Jan - 23 Jan	ANA
19 Jan - 24 Jan	ANA

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

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 January from $1526

Return flights