For the cheapest flights to Sofia book 26 days before departure.
The most popular airlines on the route Madrid - Sofia: Wizz Air (W6), Ryanair (FR), Bulgaria Air (FB).
The cheapest flights are on the route Barajas (MAD) - Sofia Airport (SOF).
Direct flights last about 3h 6min.
Direct flights are available 7 days a week.
Direct flights: Wizz Air (W6), Ryanair (FR), Bulgaria Air (FB).