Santiago is 5 hours behind Bucharest
Best overlap: 1:00 PM to 6:00 PM in Bucharest is 8:00 AM to 1:00 PM in Santiago.
For a call that suits both sides, look at 1:00 PM to 6:00 PM in Bucharest / 8:00 AM to 1:00 PM in Santiago. Santiago is 5 hours behind Bucharest, which gives you a solid 5-hour window. Book earlier in it and neither side is rushing.