AirHint found the following cheapest one-way flights from Agana (GUM) to Seoul (ICN) in August 2025 (see full year).

One-Way flights

21 Aug	Jin Air	direct
25 Aug	Jin Air	direct
19 Aug	Jin Air	direct
23 Aug	Jin Air	direct
20 Aug	Jin Air	direct
22 Aug	Jin Air	direct
12 Aug	Jin Air	direct
26 Aug	Jin Air	direct
27 Aug	Jin Air	direct
13 Aug	Jin Air	direct

Also check the deals for return flights from Agana to Seoul in August.

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 one-way flights from Agana to Seoul in August from $66

One-Way flights