AirHint found the following cheapest return flights from Fortaleza (FOR) to Porto (OPO) in September 2025 (see full year).

Return flights

06 Sep - 20 Sep	TAP
18 Sep - 23 Sep	TAP
18 Sep - 27 Sep	TAP
21 Sep - 30 Sep	TAP
01 Sep - 10 Sep	TAP
13 Sep - 21 Sep	TAP
14 Sep - 21 Sep	TAP
01 Sep - 12 Sep	LATAM Airlines Group
21 Sep - 28 Sep	TAP
03 Sep - 15 Oct	TAP
16 Sep - 26 Sep	TAP
09 Sep - 17 Oct	TAP

Also check the deals for one-way flights from Fortaleza to Porto 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 Fortaleza to Porto in September from 648€

Return flights