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

Return flights

22 May - 25 May	Jin Air	direct
07 May - 11 May	Jin Air	direct
18 May - 21 May	Jin Air	direct
18 May - 25 May	Jin Air	direct
30 May - 04 Jun	Jin Air	direct
21 May - 24 May	Korean Air	direct
18 May - 23 May	Jin Air	direct
03 May - 06 May	Philippine Airlines
03 May - 08 May	Philippine Airlines
23 May - 03 Jun	Korean Air	direct
30 May - 30 May	Korean Air	direct
03 May - 06 May	Korean Air	direct

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

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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Cheapest return flights from Agana to Seoul in May from 247€

Return flights