Originally Posted by
MSPeconomist
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.
Two tickets, and yes its D1 just interchanging that terminology with FC.