NWA routing would be LAX/MSP or DTW/ to AMS then Croatia airlines from AMS to ZAG. Or you could
take KLM from LAX/AMS and Croatia from AMS to ZAG. We don't have direct routes from LAX to Europe on NWA
On Delta you could go LAX/CDG then AF from CDG/ZAG that's not a bad way to go. Good luck and have fun,
make sure and bring at least 1 preferably 2 options to return home, or get there by buying the zed tickets ahead
of time, it's hard to add to add options overseas to come home. So plan ahead and buy any options home in Zed
you can refund when you get back if you don't use them. Have fun!