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

Return flights

27 Aug - 03 Sep	TAP
25 Aug - 14 Sep	Air Europa
30 Aug - 13 Sep	TAP
23 Aug - 27 Aug	Vueling Airlines
04 Aug - 07 Aug	Wizz Air Malta
23 Aug - 28 Aug	Vueling Airlines
25 Aug - 28 Aug	Vueling Airlines
05 Aug - 10 Aug	Ryanair
14 Aug - 18 Aug	Wizz Air Malta
06 Aug - 13 Aug	Ryanair
14 Aug - 21 Aug	Wizz Air Malta
24 Aug - 28 Aug	TAP
30 Aug - 01 Sep	TAP
20 Aug - 26 Aug	TAP

Also check the deals for one-way flights from Lisbon to Sofia 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 Lisbon to Sofia in August from 225€

Return flights