On September 10, 1945, Cunningham underwent a complete physical examination at the National Naval Medical Center in Bethesda, Maryland. He was found fit to return to duty. On December 4, 1945, he received notice of his promotion to captain, effective June 20, 1942. In January 1946, he began a period of retraining, beginning with refresher aviation training at the Naval Air Station in Pensacola, Florida.
