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

Return flights

03 Mar - 17 Mar	Turkish Airlines
09 Mar - 27 Mar	Turkish Airlines
04 Mar - 02 Apr	Turkish Airlines
16 Mar - 17 Apr	Turkish Airlines
03 Mar - 10 Mar	Turkish Airlines
30 Mar - 03 Apr	Turkish Airlines
02 Mar - 09 Mar	Turkish Airlines
09 Mar - 16 Mar	Turkish Airlines
25 Mar - 13 Apr	Turkish Airlines
17 Mar - 31 Mar	Turkish Airlines
02 Mar - 09 Mar	Korean Air	direct
09 Mar - 16 Mar	Korean Air	direct
17 Mar - 31 Mar	Korean Air	direct
03 Mar - 10 Mar	Korean Air	direct
27 Mar - 12 Apr	American Airlines
25 Mar - 13 Apr	Delta	direct
04 Mar - 02 Apr	Delta	direct
16 Mar - 17 Apr	Delta	direct

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

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 March from $1022

Return flights