My wife and I did separate trips in July:
EWR-MXP-ATH-IRK

The Segements to MXP were on CO and the AZ to ATH. I seem to remember about a 2 hour connection in MXP to ATH. I then bought separate tickets on Olympic to Crete.

I bought Z tickets EWR-MXP-ATH for about $2800. THe entire EWR-ATH-EWR segments posted with 150% EQMS

PM me if you have questions