For the cheapest flights to Sofia book 41 days before departure.
The most popular airlines on the route Prague - Sofia: Bulgaria Air (FB), KLM (KL), Lufthansa (LH).
The cheapest flights are on the route Ruzyne (PRG) - Sofia Airport (SOF).
Direct flights last about 1h 50min.
Direct flights available 4 days a week - Tuesday, Thursday, Friday, Sunday.
Direct flights: Bulgaria Air (FB).