Cheapest return BOS–ICN flights, May

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

Return flights

27 May - 03 Jun WestJet
06 May - 16 May Alaska Airlines
31 May - 15 Jun Porter Airlines (Canada) Ltd
29 May - 05 Jun WestJet
07 May - 04 Jun Alaska Airlines
30 May - 20 Jun Porter Airlines (Canada) Ltd
28 May - 10 Jun KLM
11 May - 25 May WestJet
08 May - 15 May Alaska Airlines
07 May - 21 May Alaska Airlines
06 May - 13 May Alaska Airlines
07 May - 14 May Alaska Airlines
04 May - 15 Jun Air Canada
06 May - 20 May Air Canada
24 May - 14 Jun Air Canada
31 May - 15 Jun Korean Air direct
11 May - 25 May Korean Air direct
29 May - 05 Jun Delta direct
06 May - 13 May Delta direct
06 May - 20 May Delta direct

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

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