Cheapest return IAD–ICN flights, August

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

Return flights

25 Aug - 01 Sep Frontier Airlines
16 Aug - 23 Aug Frontier Airlines
23 Aug - 31 Aug Frontier Airlines
15 Aug - 29 Aug Frontier Airlines
19 Aug - 26 Aug Alaska Airlines
14 Aug - 21 Aug Frontier Airlines
30 Aug - 08 Sep EVA Air
13 Aug - 20 Aug Frontier Airlines
17 Aug - 24 Aug Frontier Airlines
23 Aug - 31 Aug Air Premia direct
19 Aug - 26 Aug Air Premia direct
28 Aug - 06 Sep Air Premia direct
07 Aug - 15 Aug Frontier Airlines
21 Aug - 03 Sep Alaska Airlines
30 Aug - 08 Sep Delta direct
21 Aug - 03 Sep Korean Air direct

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

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