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

Return flights

25 Sep - 25 Oct	TAP	direct
18 Sep - 30 Sep	Royal Air Maroc
17 Sep - 28 Sep	Royal Air Maroc
11 Sep - 04 Oct	Royal Air Maroc
12 Sep - 25 Sep	Royal Air Maroc
30 Sep - 14 Oct	TAP
16 Sep - 27 Sep	Cabo Verde Airlines
06 Sep - 27 Sep	Ryanair
19 Sep - 03 Oct	Royal Air Maroc
26 Sep - 17 Oct	Royal Air Maroc
16 Sep - 27 Sep	TAP	direct
09 Sep - 22 Sep	Cabo Verde Airlines
10 Sep - 03 Oct	Royal Air Maroc
06 Sep - 14 Sep	TAP
12 Sep - 10 Oct	Ryanair
11 Sep - 04 Oct	TAP	direct
06 Sep - 13 Sep	Azores Airlines
06 Sep - 27 Sep	TAP	direct

Also check the deals for one-way flights from Lisbon to Bissau 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 Lisbon to Bissau in September from 584€

Return flights