The Korea Train eXpress (KTX) operated at the same station as AREX but used a different platform. It operated 20 times per day from the airport; twelve times on the Gyeonbu Line, twice on the Gyeonjeon Line, four times on the Honam Line, and twice on the Jeolla Line. The service started in 2014 but was suspended in March 2018 due to low ridership. The suspension became permanent in September 2018 as the line was officially closed.
