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

Return flights

17 Sep - 20 Sep	ANA
27 Sep - 30 Sep	ANA
30 Sep - 04 Oct	ANA
26 Sep - 04 Oct	ANA
27 Sep - 03 Oct	ANA
28 Sep - 03 Oct	ANA
30 Sep - 07 Oct	ANA
27 Sep - 01 Oct	ANA
27 Sep - 04 Oct	ANA
29 Sep - 03 Oct	ANA
23 Sep - 27 Sep	ANA
07 Sep - 10 Sep	ANA
10 Sep - 13 Sep	ANA
09 Sep - 13 Sep	ANA
09 Sep - 18 Sep	ANA
24 Sep - 27 Sep	ANA
27 Sep - 05 Oct	ANA
25 Sep - 28 Sep	ANA
25 Sep - 29 Sep	ANA

Also check the deals for one-way flights from Taipei 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 Taipei to Agana in September from 1940€

Return flights