|Active||April 1944–May 1945|
|Garrison/HQ||Königsberg (April 1944–January 1945)|
Hamburg (January–May 1945)
|Korvkpt. Ulrich Heyse (March–May 1945)|
The flotilla was formed in Königsberg, in April 1944 under the command of Fregattenkapitan Hermann Rigele. It trained mostly Type XXIII U-boats. It was transferred to Hamburg in January 1945, and in March put under the command of Korvettenkapitän Ulrich Heyse. The flotilla was disbanded in May 1945 after the German surrender.
- Fregattenkapitan Hermann Rigele (April 1944–March 1945)
- Korvettenkapitän Ulrich Heyse (March–May 1945)
Forty-three U-boats were assigned to this flotilla during its service.