Portland is 3 hours behind Panama City
Best overlap: 11:00 AM to 6:00 PM in Panama City is 8:00 AM to 3:00 PM in Portland.
The overlap falls at 11:00 AM to 6:00 PM in Panama City, or 8:00 AM to 3:00 PM if you're in Portland. Scheduling is forgiving here: with 7 hours of overlap, a missed slot just means picking another one the same day. Just remember Portland changes its clocks for daylight saving and Panama City doesn't, so confirm the overlap whenever the seasons turn.