Mexico City is 2 hours ahead of Portland
Best overlap: 8:00 AM to 4:00 PM in Portland is 10:00 AM to 6:00 PM in Mexico City.
Target 8:00 AM to 4:00 PM in Portland, which lands at 10:00 AM to 6:00 PM for the Mexico City side. Mexico City is 2 hours ahead of Portland, but you'd hardly notice — 8 hours of shared hours makes this feel like working in neighbouring time zones. Seasonal note: Portland uses daylight saving and Mexico City doesn't, so double-check the times in your own months — they can move by an hour.