Originally Posted by themicah
CZ should be able to check your bags through. But depending on how ICN is set up, there's a chance you may have to claim them and re-check them anyway (kind of like how you have to claim and re-check your bags when you go through customs on entering the US).
I have never had a problem checking bags through at ICN without having to reclaim them. Last week on two different tickets SIN to ICN on SQ and ICN to ULN on KE. Also did a connection once AMS to ICN on KL and ICN to ULN on OM. No problem.