The cheapest flight to Zürich you can get by boooking 51 days before departure.
The most popular airlines on the route Sofia - Zürich: Bulgaria Air (FB), Swiss (LX), Lufthansa (LH).
The cheapest flights you can book on the route Sofia Airport (SOF) - Kloten (ZRH).
Direct flights last about 2h 5min.
Direct flights available 6 days a week - Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
Direct flights: Bulgaria Air (FB), Swiss (LX), Air Berlin (AB).