Florian Sonnleitner was born in Munich. Encouraged by his musical parents, he began violin lessons early in life. In 1971 he began his studies at the Music Academy in Munich with Gerhart Hetzel and completed them in 1977 in Vienna with Wolfgang Schneiderhan.
In 1980 Florian Sonnleitner was a prizewinner at the German Music Competition in Bonn and in 1981 at the ARD International Music Competition in Munich.
Since 1986 Florian Sonnleitner has been principal leader of the Symphonieorchester des Bayerischen Rundfunks and also the leader and artistic director of the Bach Collegium München Chamber Orchestra. He is also the leader of the chamber music ensemble Concertino München as well as of the Cuvilliés String Quartet. Florian Sonnleitner also has a successful piano and violin duo with the pianist Yasuko Matsuda.
Invitations to play as a soloist and chamber musician have taken Florian Sonnleitner to all continents in the world including as a partner of Wolfgang Sawallisch, Maxim Vengerov, Shlomo Mintz, Josef Suk, Janos Starker, David Geringas and Jörg Demus. He also released recordings on the Obligat label.
Recently Florian Sonnleitner has become increasingly involved in teaching activities, for example at the international master classes at the music academy in Weimar and at the conservatory in Shanghai/China.