For a move between Incheon Airport Terminal 1 (T1) and Terminal 2 (T2), first confirm which terminal your flight uses. The free landside airport shuttle and the paid airport railroad use different stops and timetables.
Free shuttle from T1 to T2: The airport's Route 04 (AICC→T1→T2) stops near Exit 8 on T1's third floor and reaches T2 near Exits 6–7 on the third floor. The route's official page lists 10–20-minute intervals, service from 04:30 to 23:20 and no fare. Those hours are for Route 04 only. For T2→T1, check the separate Route 03 listing and current stop timetable rather than assuming identical service.
Airport railroad: The airport's terminal-transfer guide describes about 6 minutes of train travel between stations and a listed fare of KRW 1,050. This is not the total journey time: add walking, ticketing, waiting and any security or check-in procedures. Verify current fares and schedules with the railroad at +82-1599-7788.
Wheelchair support: The airport lists a complimentary lift-van service via its shuttle office, +82-32-741-3217. Availability depends on vehicles and staff, and advance reservations are recommended. Allow extra time for baggage and terminal navigation, and seek airline advice for tight connections.