AirHint found the following cheapest return flights from Seoul (GMP) to Agana (GUM) in July 2025 (see full year).

Return flights

03 Jul - 06 Jul	Korean Air
10 Jul - 13 Jul	Korean Air
17 Jul - 21 Jul	Korean Air
02 Jul - 14 Jul	Korean Air
02 Jul - 06 Jul	Korean Air
02 Jul - 07 Jul	Korean Air
09 Jul - 16 Jul	Korean Air
14 Jul - 18 Jul	Korean Air
12 Jul - 26 Jul	Korean Air
08 Jul - 16 Jul	Korean Air
22 Jul - 23 Aug	Korean Air
31 Jul - 07 Aug	Korean Air
29 Jul - 04 Aug	Korean Air
31 Jul - 04 Aug	Korean Air
31 Jul - 05 Aug	Korean Air
31 Jul - 03 Aug	Korean Air
31 Jul - 02 Aug	Korean Air
29 Jul - 05 Aug	Korean Air
27 Jul - 02 Aug	ANA
28 Jul - 02 Aug	ANA

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

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 Seoul to Agana in July from $472

Return flights