Madrid is 9 hours ahead of Portland
Best overlap: 8:00 AM to 9:00 AM in Portland is 5:00 PM to 6:00 PM in Madrid.
Plan around 8:00 AM to 9:00 AM in Portland, which is 5:00 PM to 6:00 PM in Madrid, to catch everyone during office hours. Madrid is 9 hours ahead of Portland. That's only 1 hour of overlap, so pair live calls with async follow-ups to make the most of it.