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
One ticket or two (for each person)?
BTW, DL doesn't fly FC into MAD. You're probably in D1, but then the Y flight on IB would mean a new fare component, or broken fare, so I suspect that you have different tickets/PNRs.
ADDED: Cancel that. Domestic IB is probably coach only, and DL does interline with IB.