Cheapest return flights from Washington to Seoul in May from $919

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

Return flights

02 May - 09 May Frontier Airlines
11 May - 18 May Etihad Airways
14 May - 23 May Frontier Airlines
08 May - 24 May Etihad Airways
15 May - 06 Jun Icelandair
21 May - 04 Jun SWISS
18 May - 21 Jun Frontier Airlines
29 May - 12 Jun WestJet
15 May - 24 May WestJet
20 May - 31 May Porter Airlines (Canada) Ltd
16 May - 02 Jun Frontier Airlines
16 May - 13 Jun Frontier Airlines
18 May - 05 Jun Frontier Airlines
15 May - 23 May WestJet
16 May - 24 May Porter Airlines (Canada) Ltd
28 May - 04 Jun Etihad Airways
14 May - 04 Jun Frontier Airlines
14 May - 24 May Frontier Airlines
18 May - 10 Jun WestJet
18 May - 25 May Frontier Airlines

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

Powered by

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Feel free to contact us with any feedback or request another flight research.