In late 1917 Yount transferred to the Signal Corps' Temporary Aviation Section, with duty at Kelly Field in San Antonio, Texas.

During World War I, Yount carried out aviation assignments as commander of Camp Dick in Dallas, Texas, at the Department of Military Aeronautics, in Washington, D.C. and at Rockwell Field, California.

He graduated from the Air Corps Engineering School in 1925, afterward carrying out a four-year tour as Assistant Military Attaché for Aviation in Paris, France.

Yount died at Oak Creek Lodge in Sedona, Arizona and was buried at Arlington National Cemetery, Section 30, Grave 1047-RH.

Yount's wife, Mildred, chaired the selection committee that in 1939 chose the winning entry of The U.S. Air Force Song.