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

Return flights

28 Aug - 02 Sep	Pegasus Airlines
19 Aug - 26 Aug	Air Serbia
13 Aug - 28 Aug	Air Serbia
27 Aug - 02 Sep	Air Serbia
31 Aug - 07 Sep	Air Serbia
14 Aug - 28 Aug	Pegasus Airlines
30 Aug - 02 Sep	easyJet
13 Aug - 27 Aug	Air Serbia
13 Aug - 29 Aug	Air Serbia
14 Aug - 19 Aug	easyJet
14 Aug - 23 Aug	Pegasus Airlines
28 Aug - 30 Aug	Pegasus Airlines
23 Aug - 30 Aug	Air Serbia
03 Aug - 20 Aug	Pegasus Airlines
30 Aug - 02 Sep	SWISS	direct
28 Aug - 02 Sep	SWISS	direct
27 Aug - 02 Sep	SWISS	direct

Also check the deals for one-way flights from Zurich 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 Zurich to Sofia in August from $193

Return flights