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

Return flights

15 Sep - 19 Sep	Peach
22 Sep - 29 Sep	Peach
10 Sep - 12 Sep	Air Busan
17 Sep - 20 Sep	United	direct
02 Sep - 09 Sep	United	direct
08 Sep - 11 Sep	United	direct
09 Sep - 11 Sep	United	direct
23 Sep - 27 Sep	United	direct
16 Sep - 19 Sep	United	direct
03 Sep - 10 Sep	United	direct
27 Sep - 01 Oct	United	direct
27 Sep - 17 Oct	Jin Air
27 Sep - 16 Oct	Jin Air
26 Sep - 17 Oct	Jin Air
26 Sep - 16 Oct	Jin Air
30 Sep - 20 Oct	Jin Air
30 Sep - 17 Oct	Jin Air
30 Sep - 16 Oct	Jin Air
30 Sep - 19 Oct	Jin Air

Also check the deals for one-way flights from Osaka to Agana in September.

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 September from $252

Return flights