SUM Air, known in Korean as Seom Air, is a South Korean regional airline developed to connect smaller cities and islands with ATR 72-600 turboprops. It received its small-air-transport business licence in February 2025 and brought its first aircraft to Gimpo in January 2026. Its current scheduled service links Seoul Gimpo with Sacheon.
Open the SUM Air ATR 72-600 seat map to explore its seats.
Reserve through its website or reservations centre until 24 hours before departure. Otherwise a seat is allocated at the airport. For tickets bought from 13 October 2026, the Korean policy makes advance selection free with the normal Y fare; discounted and promotional fares are charged. Check the terms shown with your ticket.
You must be able to help the crew in an emergency and communicate in Korean or English. Its restrictions include passengers under 15, pregnant passengers, people accompanying infants or children, and passengers with pets. Airport staff may reject an unsuitable exit-row allocation even if it was purchased.
