Currently there are no direct flights Sofia to Azerbaijan.

Flights Sofia to Azerbaijan with 1 stopover:

Flights via Boryspil (KBP), Kiev, Ukraine
From Sofia, Bulgaria with Aerosvit Transfer at Boryspil (KBP), Kiev, Ukraine Then on to Baku Airport (BAK), Azerbaijan with Aerosvit
Flights via London Heathrow (LHR), London, United Kingdom
From Sofia (SOF), Bulgaria with British Airways Transfer at London Heathrow (LHR) Then on to Heydar Aliyev International (Bina International) (GYD), Baku, Azerbaijan with British Mediterranean Airways
OR
Then on to Baku Airport (BAK), Baku, Azerbaijan with British Airways
Flights via Moscow Sheremetievo (SVO), Moscow, Russia
From Sofia (SOF), Bulgaria with Aeroflot
OR
From Sofia (SOF), Bulgaria with Aerosvit
Transfer at Moscow Sheremetievo (SVO), Moscow, Russia Then on to Heydar Aliyev International (Bina International) (GYD), Baku, Azerbaijan with Aeroflot