Montevideo is 5 hours ahead of Portland
Best overlap: 8:00 AM to 1:00 PM in Portland is 1:00 PM to 6:00 PM in Montevideo.
Portland and Montevideo overlap from 8:00 AM to 1:00 PM (Portland) to the equivalent 1:00 PM to 6:00 PM in Montevideo — that's your meeting window. The overlap sits at about 5 hours; aim for the heart of it so the call isn't too early for one team or too late for the other. Note the seasonal wrinkle: when Portland is on daylight saving and Montevideo isn't, the gap between them grows or shrinks by an hour.