Update 3: this fare is a bit tricky, it comes an go. For the moment it's back. Our Link works as well again. To check for a date use google flights and try 1 day after another in February and March, and you will find some availability.
Business class Zurich to New York 470€ with Air Serbia (lie flat seats), 1 stop in BEL.
That sounds like a nice XMas gift :). There's a possibility that this might be an error fare with such a low price.
VALID FOR TRAVEL COMMENCING ON/AFTER 15JAN 19 AND ON/ BEFORE 31MAR 19.
TICKETS MUST BE ISSUED ON/AFTER 21DEC 18 AND ON/BEFORE 28FEB 19.
TRAVEL FROM LAST STOPOVER MUST COMMENCE NO EARLIER THAN 3 DAYS AFTER DEPARTURE FROM FARE ORIGIN OR - TRAVEL FROM LAST STOPOVER MUST COMMENCE NO EARLIER THAN THE FIRST SUN AFTER DEPARTURE FROM FARE ORIGIN.
TRAVEL FROM LAST STOPOVER MUST COMMENCE NO LATER THAN 3 MONTHS AFTER DEPARTURE FROM FARE ORIGIN.
Seen on Vielfligertreff