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

Return flights

27 Aug - 20 Sep	Vueling Airlines
30 Aug - 22 Sep	Ryanair
11 Aug - 11 Sep	Ryanair
14 Aug - 21 Aug	Ryanair
27 Aug - 19 Sep	Vueling Airlines
28 Aug - 05 Sep	Ryanair
19 Aug - 27 Aug	Austrian Airlines
20 Aug - 27 Aug	Austrian Airlines
26 Aug - 30 Aug	Vueling Airlines
13 Aug - 13 Sep	Ryanair
20 Aug - 01 Sep	Austrian Airlines
31 Aug - 03 Sep	easyJet
16 Aug - 03 Sep	Ryanair
20 Aug - 26 Aug	easyJet
16 Aug - 20 Aug	Ryanair
12 Aug - 17 Aug	Ryanair
06 Aug - 01 Sep	Austrian Airlines
26 Aug - 26 Aug	Vueling Airlines
11 Aug - 16 Aug	Ryanair
23 Aug - 27 Aug	Bulgaria Air

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.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest return flights from Lisbon to Sofia in August from $246

Return flights