Dont trust the duration!!
Map of the subway is correct, but the estimated duration is sooooooo fxxcking wrong!!! Unreliable!
It took me more than 120 mins to get to airport and not only 77 min!! Transit time not included!!! And no, there was no problem with the subway!! Regular traffic (7 am!)
I now have great cost to reschedule my trip!
kathylism about
Seoul Metro Subway Map, v1.1.12