Oberleutnant Otto Jäger (6 April 1894 – 19 August 1917) was an Austro-Hungarian World War I flying ace credited with seven aerial victories.

Posted back to the Russian Front to fly with Fliegerkompanie 10 (Flik 10) in early 1916, Jäger scored his fifth victory on 2 August 1916.

After training as a pilot for the rest of 1916, Jäger returned to the Russian Front to score his sixth victory on 20 July 1917.

Otto Jäger was born to Sudeten German parents on 6 April 1894 in Aš, West Bohemia in the Austro-Hungarian Empire.

[2] In Spring 1916, Jäger was posted back to the Russian Front, to Fliegerkompanie 10 (Flik 10), in the dual roles of technical officer and aerial observer.

He was manning the observer's rear gun for Karl Urban in an Albatros B.I at 0900 hours on 5 May 1916, when he was credited with his first aerial victory near Koryto.

[1] He was credited with forcing a "large Russian battleplane" to land just behind enemy lines; his victim may have been either a Farman or a Sikorsky.

[3] On 2 August 1916, Jäger and Urban were flying a morning patrol in a Hansa-Brandenburg C.I when they destroyed a Sikorsky bomber east of Szelwow.

Shortly thereafter, he was posted onward to Fliegerkompanie 17 (Flik 17), also on the Russian Front, as a reconnaissance pilot in two-seat aircraft.

[1][5] With this proof of ability, Jäger was sent to a dedicated fighter squadron, Fliegerkompanie 42J (Flik 42J), on the Italian Front.