Ponta Delgada isn't a destination business travelers stumble into by accident, and that's precisely what makes the routing from Buffalo so interesting to solve. There is no nonstop option here, so business class from Buffalo to Ponta Delgada requires a connection through one of the major East Coast gateways — most reliably Boston, New York-JFK, or Newark — where Delta, American, and United each maintain seasonal or year-round widebody service into the Azores. Delta typically routes travelers through JFK with its A330 or A350 business class, featuring the Delta One suite with a closing door, which remains one of the more refined transatlantic products originating from a domestic connection. American tends to funnel Buffalo passengers through Philadelphia or JFK onto its 777 or 787 configurations, both outfitted with fully flat Flagship Business seats, while United's most sensible connection runs through Newark, leveraging its Polaris seat on the 767 or 787 fleet for the Atlantic crossing.
Having flown this connection pattern more times than I can count, I've learned that the short domestic legs from Buffalo are almost always operated on regional aircraft, so the real business class experience — lounge access, lie-flat seating, proper dining — doesn't begin until the transatlantic leg. My insider tip: build in at least a 90-minute connection window at JFK or Newark specifically to use the Delta One or United Polaris lounges before boarding, since these facilities offer far better pre-flight dining than anything available at BUF, and a relaxed start matters enormously on a route with an unusually short five-hour Atlantic hop.
Seasonality plays a bigger role here than on most transatlantic routes, since Ponta Delgada's appeal is heavily tied to Azorean tourism cycles. January through March and October into November consistently offer the softest demand and the best chances at premium award space or discounted paid business fares, as leisure travelers cluster around summer months. Given how thin and variable capacity is on this corridor, I'd strongly recommend setting up fare alerts rather than checking manually — pricing on Buffalo-to-Ponta Delgada business class can shift quickly once one of the three carriers adjusts seasonal capacity.