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

Return flights

30 Aug - 06 Sep	Austrian Airlines
30 Aug - 07 Sep	Austrian Airlines
21 Aug - 09 Sep	Ryanair
31 Aug - 04 Sep	Austrian Airlines
20 Aug - 27 Aug	Ryanair
26 Aug - 29 Aug	LOT
20 Aug - 03 Sep	Ryanair
21 Aug - 08 Sep	Ryanair
24 Aug - 29 Aug	LOT
21 Aug - 04 Sep	Ryanair
28 Aug - 31 Aug	Ryanair
19 Aug - 20 Aug	Ryanair
18 Aug - 20 Aug	Wizz Air Malta
21 Aug - 28 Aug	Ryanair
29 Aug - 31 Aug	Ryanair
19 Aug - 22 Aug	Ryanair
19 Aug - 21 Aug	Ryanair
27 Aug - 03 Sep	SKY express
27 Aug - 10 Sep	SKY express

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 192€

Return flights