A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
In principle, if you are not flying during DL's blackout dates for KE, you can upgrade a KE flight with DL miles if upgrade inventory is available and if you have purchased a FULL Y ticket under the SkyTeam upgrade award program. This doesn't require elite status and you would earn miles based on the purchased full Y fare class.