icn transit airport fly out refers to a flight departing from the Incheon International Airport (ICN) in Seoul, South Korea, often used for international cargo and passenger flights. When an item is marked as “ICN transit” in a tracking system, it indicates that the shipment is passing through this major hub before continuing to its destination. ICN is one of the busiest airports in the world, known for efficient transit services and handling large volumes of international shipments.