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

Return flights

09 Aug - 02 Sep	Royal Air Maroc
16 Aug - 21 Aug	TAP	direct
16 Aug - 23 Aug	TAP	direct
19 Aug - 16 Sep	TAP	direct
16 Aug - 20 Sep	TAP	direct
09 Aug - 06 Sep	TAP	direct
04 Aug - 08 Sep	Royal Air Maroc
05 Aug - 12 Sep	Royal Air Maroc
09 Aug - 02 Sep	TAP	direct
06 Aug - 13 Aug	Royal Air Maroc
15 Aug - 12 Sep	Euroatlantic Airways Charter	direct
07 Aug - 14 Aug	TAP	direct
02 Aug - 07 Aug	Royal Air Maroc
01 Aug - 08 Aug	Air Côte dIvoire
05 Aug - 09 Sep	Royal Air Maroc
02 Aug - 07 Aug	TAP	direct
08 Aug - 13 Sep	Air Côte dIvoire

Also check the deals for one-way flights from Bissau to Lisbon in August.

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 Bissau to Lisbon in August from 762€

Return flights