SUM Air orders four ATR 72-600s, with options for four more, to boost regional connectivity in Korea

New Korean regional carrier SUM Air has placed an order for four ATR 72-600 turboprops, with options for four additional aircraft, marking a key step in its expansion strategy. Deliveries are scheduled from 2028. The airline, which began operations in March 2026, aims to improve connectivity across underserved regions in South Korea, including island airports