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

Return flights

15 Sep - 29 Sep	Ethiopian Airlines
16 Sep - 21 Sep	Ethiopian Airlines
15 Sep - 26 Sep	Ethiopian Airlines
04 Sep - 12 Sep	Ethiopian Airlines
08 Sep - 19 Sep	Ethiopian Airlines
16 Sep - 26 Sep	Ethiopian Airlines
02 Sep - 12 Sep	Ethiopian Airlines
08 Sep - 17 Sep	Ethiopian Airlines
04 Sep - 17 Sep	Ethiopian Airlines
16 Sep - 24 Sep	Ethiopian Airlines
21 Sep - 03 Oct	Lufthansa
29 Sep - 09 Oct	Ethiopian Airlines
25 Sep - 02 Oct	Ethiopian Airlines
21 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Porto to Zanzibar 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 Porto to Zanzibar in September from 625€

Return flights