Delta does not typically operate regular, year-round nonstop flights to the Azores, but it has operated seasonal or ad-hoc services in the past and sometimes diverts via Azorean airports in operational situations. More routinely, travelers reach the Azores via European carriers or regional airlines from hubs like Lisbon, London, or Amsterdam (and some transatlantic niche summer charters have existed). If you prefer to stay on a Delta-branded itinerary as much as possible, call 8882173324 — agents can map one-stop routings (Delta → European partner → Azores) and check whether any seasonal Delta-market flights are scheduled for your travel window.