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

Return flights

26 Aug - 31 Aug	Wizz Air
30 Aug - 04 Sep	Wizz Air
30 Aug - 06 Sep	Wizz Air
26 Aug - 01 Sep	Wizz Air
30 Aug - 05 Sep	Wizz Air
21 Aug - 26 Aug	Wizz Air
21 Aug - 24 Aug	Wizz Air
21 Aug - 25 Aug	Wizz Air
28 Aug - 31 Aug	Ryanair
27 Aug - 03 Sep	Ryanair
23 Aug - 27 Aug	Wizz Air
31 Aug - 06 Sep	Wizz Air
27 Aug - 01 Sep	Ryanair
30 Aug - 07 Sep	Wizz Air
24 Aug - 29 Aug	Wizz Air
26 Aug - 03 Sep	Wizz Air
20 Aug - 27 Aug	Ryanair
29 Aug - 05 Sep	Wizz Air
20 Aug - 23 Aug	Ryanair
13 Aug - 16 Aug	Wizz Air

Also check the deals for one-way flights from Sofia 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 Sofia to Lisbon in August from $226

Return flights