Cheapest return flights from Washington to Seoul in April from $876

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 April 2025 (see full year).

Return flights

06 Apr - 08 Apr American Airlines
23 Apr - 06 May American Airlines
07 Apr - 16 Apr American Airlines
05 Apr - 08 Apr American Airlines
21 Apr - 09 May American Airlines
22 Apr - 14 May Turkish Airlines
22 Apr - 07 May Turkish Airlines
03 Apr - 14 Apr Turkish Airlines
23 Apr - 11 May Turkish Airlines
14 Apr - 18 Apr Air Canada
07 Apr - 29 Apr American Airlines
20 Apr - 05 May American Airlines
10 Apr - 27 Apr American Airlines
10 Apr - 14 Apr Air Canada
04 Apr - 23 Apr American Airlines
14 Apr - 02 May American Airlines
24 Apr - 11 May Turkish Airlines
10 Apr - 04 May Air Canada
24 Apr - 04 May Air Canada
09 Apr - 19 Apr Air Canada

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

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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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