AirHint found the following cheapest return flights from Osaka (KIX) to Agana (GUM) in August 2025 (see full year).

Return flights

29 Aug - 05 Sep	United	direct
31 Aug - 02 Sep	United	direct
28 Aug - 04 Sep	United	direct
30 Aug - 04 Sep	United	direct
28 Aug - 31 Aug	Eastar Jet
19 Aug - 26 Aug	Air Busan
19 Aug - 23 Aug	Air Busan
26 Aug - 28 Aug	United	direct
11 Aug - 18 Aug	Peach
23 Aug - 26 Aug	Jeju Air
20 Aug - 27 Aug	Jeju Air
25 Aug - 31 Aug	Jeju Air
29 Aug - 31 Aug	Jeju Air
18 Aug - 20 Aug	Jeju Air
16 Aug - 03 Sep	Jin Air
16 Aug - 06 Sep	Jin Air
16 Aug - 05 Sep	Jin Air
16 Aug - 04 Sep	Jin Air
16 Aug - 02 Sep	Jin Air
21 Aug - 09 Sep	Jin Air

Also check the deals for one-way flights from Osaka to Agana 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 return flights from Osaka to Agana in August from 250€

Return flights