AirHint found the following cheapest return flights from Sao Tome (TMS) to Lisbon (LIS) in September 2025 (see full year).

Return flights

29 Sep - 30 Oct	TAAG Angola Airlines
26 Sep - 19 Oct	TAAG Angola Airlines
17 Sep - 12 Oct	TAAG Angola Airlines
20 Sep - 18 Oct	Euroatlantic Airways	direct
19 Sep - 17 Oct	TAP
27 Sep - 04 Oct	Euroatlantic Airways	direct
17 Sep - 23 Sep	TAP
20 Sep - 27 Sep	TAP	direct
19 Sep - 04 Oct	TAP
24 Sep - 28 Sep	TAAG Angola Airlines
12 Sep - 05 Oct	TAAG Angola Airlines
15 Sep - 12 Oct	TAAG Angola Airlines
10 Sep - 07 Oct	TAAG Angola Airlines
13 Sep - 27 Sep	TAP	direct
13 Sep - 20 Sep	TAP	direct
05 Sep - 21 Sep	TAAG Angola Airlines
06 Sep - 13 Sep	TAP	direct
06 Sep - 21 Sep	TAP
15 Sep - 28 Sep	TAAG Angola Airlines
06 Sep - 16 Sep	TAP	direct

Also check the deals for one-way flights from Sao Tome to Lisbon 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 Sao Tome to Lisbon in September from $659

Return flights