OS 2891 Economy HRK SOF Sofia BG Bulgaria ZAG Zagreb HR Croatia airfare.com 2009-12-12T00:00:00Z MA 2896 Economy HRK SOF Sofia BG Bulgaria ZAG Zagreb HR Croatia airfare.com 2009-12-12T00:00:00Z OU 3575 Economy HRK SOF Sofia BG Bulgaria ZAG Zagreb HR Croatia airfare.com 2009-12-12T00:00:00Z