He took part in battles on the Serbian Front in World War I, where his unit (14th Dragoons Regiment) suffered heavy losses.

In 1927, he married Lucia Stephanovici, later known under the pen name of Lotte Berg as a translator and author of children's books.

For two successive terms, he was also president of the Rădăuți Agricultural Chamber and director of the Cernăuți Northern Bank.

His programme, presented upon his installation, foresaw: After the Soviet ultimatum of June 1940, Bessarabia and Northern Bukovina were incorporated into the USSR.

During World War II, Gheorghe Flondor helped save the lives of 12 Jewish families.

[2] After leaving Northern Bukovina, Flondor quit politics entirely and settled in Sibiu, where in 1945 he divorced his wife.

[3] During the trial, twelve Romanian citizens of Jewish origin from Siret went to the State Notary of the former Siret Raion, Suceava Region, and signed a declaration affirming that "during the racial persecutions, [Flondor] had a fair, democratic and well-intentioned attitude toward the Jewish population, helping it at critical moments in relation to the racial persecution against the Jews by the fascist authorities".