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

Return flights

26 Jun - 03 Jul	Jeju Air
30 Jun - 03 Jul	T'way Air
26 Jun - 29 Jun	Korean Air
23 Jun - 01 Jul	Korean Air
23 Jun - 21 Jul	Korean Air
23 Jun - 14 Jul	Korean Air
26 Jun - 14 Jul	Korean Air
24 Jun - 06 Jul	Korean Air
21 Jun - 27 Jun	Korean Air
23 Jun - 27 Jun	Korean Air
23 Jun - 25 Jun	Korean Air
21 Jun - 30 Jun	Korean Air
27 Jun - 29 Jun	Korean Air
18 Jun - 21 Jun	Korean Air
24 Jun - 26 Jun	Korean Air
24 Jun - 27 Jun	Korean Air
24 Jun - 29 Jun	Korean Air
30 Jun - 04 Jul	Korean Air
30 Jun - 06 Jul	Korean Air
24 Jun - 02 Jul	Korean Air

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

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 June from $341

Return flights