After you've bought tickets, you turn around 180 degrees and head to the turnstiles. The orange line is the Rapid line, and tickets are typically about Y1200 or W12 000. That's about 10 times what you pay to catch the subway here. Having said that, the average limousine bus from Incheon airport in Korea is W6 500 to W 7000. There is a slightly cheaper ticket that takes longer. It's Y950 or W9 500 (roughly R45).