I see that limousine bus stops running at 10:00 PM at ICN. How much does tax ride cost to Gangnam after hours?

Still taxi is very expensive. Even after 10PM, there are some schedules available.

http://www.airport.kr/airport/traffi...ist.iia?flag=E
http://www.airport.kr/iiacms/pageWor...=1285334449919

In addition to this, KE and OZ has a couple of 11pm-midnight arrivals, and they arrange buses to downtown. Oh, that is also included in the second link.

Thanks!

How late is your arrival? Because the AREX might be another alternative. Their timetable is here:
http://www.arex.or.kr/jsp/eng/time/time_table.jsp
At Gimpo you can change to an express subway to the Gangnam area, but I'm not sure what time the last train is from there. You can probably google it if you're interested.

I once arrived at ICN very late (about 01:30 I think) on KE, with the flight being delayed due to a snowstorm. KE had some special KAL limousine buses run for the passengers arriving on my flight, including one to the Gangnam area. I simply got off at the nearest stop to where I wanted to go and took a taxi the remaining distance. Quiet easy and much cheaper than a taxi. The last time I took at taxi to ICN was several years ago and it cost me something like 70,000 KRW and I believe prices have gone up since then. I simply cannot see throwing that kind of money at a taxi when the buses to/from ICN are so convenient.

it cost a friend of mine 70k to Gangnam recently via taxi. (this is before the slightly higher charge after 12am kicks in)

But there are some late night buses after 10pm....as I took one at 1.20am to Express Bus Terminal also fairly recently.

Can't recall the exact times but there are definitely at least 3 late buses (limited times) from bus stop 5A to:

Seoul station
Gangnam Express Bus Terminal
Yeongdeungpo station

And as someone mentioned previously, KE has special buses for late arriving flights.

What I saw was there were limo busses running every 20 minutes on Friday until midnight.