Cheapest return flights from Washington to Seoul in May from $976

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

Return flights

03 May - 10 May Frontier Airlines
07 May - 16 May Etihad Airways
15 May - 28 May WestJet
04 May - 15 May Alaska Airlines
06 May - 15 May Alaska Airlines
09 May - 17 May Frontier Airlines
15 May - 06 Jun WestJet
11 May - 18 May Frontier Airlines
05 May - 15 May Alaska Airlines
08 May - 24 May Frontier Airlines
01 May - 08 May Etihad Airways
20 May - 03 Jun Porter Airlines (Canada) Ltd
19 May - 09 Jun Frontier Airlines
16 May - 02 Jun Porter Airlines (Canada) Ltd
25 May - 24 Jun WestJet
24 May - 06 Jun Porter Airlines (Canada) Ltd
21 May - 04 Jun SWISS
14 May - 04 Jun Porter Airlines (Canada) Ltd
28 May - 09 Jun Porter Airlines (Canada) Ltd
16 May - 13 Jun KLM

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

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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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