Will be traveling JFK-Madrid and Madrid-Vienna on 2 tickets (IB plus) with luggage. I have been told that I may have to collect my luggage in Madrid. NY flight arrives in 4S and Vienna flight departs from 4S .
How likely is it for IB to check the luggage through? If not do I have to go through immigration to get the bags on the second flight or is it like the US where there is a connection desk to take the luggage without going through immigration and passport control? Thx