Level Buster
Is Per diem for off duty time then, and does that include time at INC as it seems that this is where you spend the most amount of time.
Think of it this way... whilst the clock is ticking for your duty time, it is stopped for your per diem. When you finish your trip and the duty clock stops, that's when the per diem clock starts again. As you are off duty in ICN, the per diem clock is ticking away.....
Also, do you know if the route network is expanding with an increase in 737 deliveries or is the current recruitment drive just a continuing replacement of crew turnover.
Generally the route network is expanding for the pax. fleet, and I suspect it is contracting slightly for the freighters. More specifically on the 737, we seem to be starting new routes all the time, but we lose a few too, especially when they outgrows the capacity of the 737, Incheon-Hanoi, being a recent example. The scheduled 737 deliveries include 3x-900ERs, and 1x700(BBJ), at the same time we lose 3 (I think) -800s to Jin Air KALs LoCo start up airline. The fleet size should remain broadly neutral at 30 units, with a bit of extra capacity from the -900ERs.
I don't know what's behind the present recruitment drive which is across all fleets (except the A300)BTW, but one can speculate that more crew are needed to replace retirees, and also to be in place, as and when KAL take delivery of all the 787, 777, 747-800, and A380s that are on order.
AFD
is there any chance to get downtown seoul by subway from hyatt hotel?
Yes but you need to change at Gimpo, you can also use the KAL Limousine Coach.