Oikonomides returned to Greece, but the establishment of the dictatorial Regime of the Colonels in 1967 forced him to go to exile in Canada along with his wife, the Ottomanist Elizabeth Zachariadou.
Oikonomides kembali ke Yunani, tetapi pendirian Junta militer Yunani pada tahun 1967 memaksanya pergi ke pengasingan di Kanada bersama istrinya, Ottomanis Elisabeth Zachariadou.