1 hour and 1 minutes. The straight-line distance from Hongda to Incheon is 51.9km, and it takes one hour and ten minutes for Hongda to take the subway to Incheon. The subway starts from Hongdae entrance subway station, and takes Line 2 of Hongdae entrance subway station to Incheon International Airport Station. The cost is 45 won. Hongyi University is a four-year full-time university founded in Seoul, South Korea in 1946. It has a number of key undergraduate majors, as well as national key scientific research institutes and art and culture institutes, including East Asian Art and Culture Institute and International Design Institute.