Analysis of information sources in references of the Wikipedia article "AREX" in English language version.
In 2014, KORAIL began to offer KTX high-speed train connections from Incheon International Airport to Seoul, Daegu, Busan and other cities in Korea. The Incheon Airport KTX service was suspended now at the end of March 2018. The main reason was that the demand was too low and ridership stayed far below necessary numbers.