Arriving at T1: find ticketing on 1F
After immigration and baggage collection, follow bus signs on Terminal 1's first floor. Ticket counters are inside and outside on 1F. Show your destination stop, then use the route, departure time and bus bay on your ticket to find the boarding point. A terminal exit number and a bus bay number are different identifiers.
Arriving at T2: go to transport center B1
At Terminal 2, bus information and ticket sales are at the bus terminal on B1 of the transport center. Follow bus/transport-center signs from arrivals. With luggage, allow time to change floors. A photo or bay number for T1's outdoor boarding area will not locate your T2 bus.
Choose the destination stop before the route
A district name such as Myeongdong or Dongdaemun may cover several stops. Compare your accommodation's address with the drop-off point on the map, and check that it appears in the airport-to-city direction. Include the final trip from that stop with your luggage when choosing a route.
Use departures for your arrival terminal
The same route has separate T1 and T2 departures. Landing time is not boarding time: account for immigration, baggage, ticketing and reaching the bay. This guide verifies boarding facilities, not processing time for your flight or the opening hours of every ticket counter.