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

Return flights

29 Aug - 11 Sep	Ryanair
28 Aug - 09 Sep	Wizz Air Malta
15 Aug - 19 Aug	Ryanair
16 Aug - 19 Aug	Ryanair
04 Aug - 11 Aug	Austrian Airlines
31 Aug - 08 Sep	Austrian Airlines
10 Aug - 14 Aug	Austrian Airlines
16 Aug - 30 Aug	Ryanair
30 Aug - 07 Sep	Lufthansa
06 Aug - 10 Aug	Austrian Airlines
19 Aug - 24 Aug	Ryanair
14 Aug - 26 Aug	Ryanair
14 Aug - 23 Aug	Ryanair
03 Aug - 04 Aug	Air Serbia

Also check the deals for one-way flights from Prague 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 Prague to Sofia in August from $182

Return flights