Originally Posted by
ffay005
Moreover, the ICN plane stays on the ground for 1:55 only. I have no idea whether it's possible to make a transfer in that time and I'm not at all familiar with the airport.
Very much doable. Come off the plane, follow the transit signs, go through transfer security (you'll be the only pax, probably) and up the stairs, back to the departure area. I did quite a few transfers at ICN, even though not same plane turnarounds, but to utilize the Chinese 72/144 hrs TWOV opportunities and/or save a bunch to JPN.