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

One-Way flights

19 Sep	Jeju Air
16 Sep	Jeju Air
18 Sep	T'way Air	direct
19 Sep	T'way Air	direct
26 Sep	T'way Air	direct
20 Sep	T'way Air	direct
24 Sep	T'way Air	direct
13 Sep	T'way Air	direct
05 Sep	T'way Air	direct
03 Sep	T'way Air	direct

Also check the deals for return flights from Agana to Osaka 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 one-way flights from Agana to Osaka in September from $211

One-Way flights