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

Return flights

30 Sep - 02 Oct	Wizz Air
24 Sep - 30 Sep	Ryanair
09 Sep - 12 Sep	Ryanair
24 Sep - 26 Sep	Ryanair
16 Sep - 20 Sep	Ryanair
26 Sep - 02 Oct	Wizz Air
20 Sep - 27 Sep	Ryanair
23 Sep - 25 Sep	Wizz Air
17 Sep - 23 Sep	Ryanair
23 Sep - 27 Sep	Ryanair
09 Sep - 11 Sep	Ryanair
29 Sep - 03 Oct	Wizz Air
13 Sep - 16 Sep	Ryanair
04 Sep - 14 Oct	LOT
05 Sep - 15 Oct	LOT

Also check the deals for one-way flights from Sofia to Prague in September.

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 Sofia to Prague in September from $128

Return flights