Express and all-stop
From Incheon Airport to Seoul Station, the express and the all-stop are different trains. The express does not stop at Hongdae. To start in Hongdae, take the all-stop. Gimpo is not on this line. Do not look for it on the express timetable. City metro and buses take T-money. The Climate Card is Seoul's transit pass. Scope and fare follow the official notice that day, and this page does not print an unverified number. Last trains sit around midnight. It is not an all-night service. Do not time a night street to the last train. Leave once you have closed the district you chose. Keep a transit card on you. The Climate Card's scope is whatever the official note says that day. Do not ride the airport express from memory.
Do not lap Line 2
Line 2 strings Hongdae, Seongsu, Jamsil and Gangnam together. Use the loop to pick a segment, not to stamp the circle. One south exit a day. If you get off at Hongdae, do not use the same ticket to collect Seongsu and Jamsil. For the Hangang bus and Cheonggye A01, see the 2026 note. No fare is printed here. In rain, move to the indoor stop on the axis you already chose. Do not open a second corridor just to stay dry. The station where you get off is today's south or west. If you board Line 2 again, it is to reach the hotel, not to collect another name.