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: 100,417
Can you start by checking whether Air Europa is *currently* a SkyTeam member or not? You might also want to check delta.dumb to see whether they might be a bilateral partner of DL even if not an alliance member.
Is your flight booked under an Air Europe flight number (not codeshare)?