AlitaliaMD11 From Spain, joined Dec 2003, 4068 posts, RR: 13
Reply 1, posted (8 years 5 months 3 weeks 2 days 14 hours ago) and read 1640 times:
If you were flying Iberia from say JFK to MAD and then onto ZRH you would probably check your bags in at JFK to be transfered directly to your ZRH flight and you would not have to clear immagration, just follow the signs for transfers and go to your flight to ZRHs' gate.
Since you are flying two different airlines you will probably have to collect your luggage first and then go check in with Iberia, which means you will have to clear immagration before collecting your luggage.
If you are only with carry on luggage then you will probably not have to clear immagration just go to your flight to ZRHs' gate.
This is all just a guess since I have never connected in MAD just flown into it and out of it.