Providence's modest Green Airport doesn't offer nonstop service to Central Europe, so anyone booking business class from Providence to Vienna needs to think of this as a two-flight itinerary built around a strong US or European hub. The reality: there is no nonstop PVD–VIE route on any carrier, and total journey time including a connection typically runs well beyond the 9.5-hour flying time once you factor in the transatlantic leg itself. Delta routes most naturally through JFK or Boston into Amsterdam or Paris on a widebody before a SkyTeam partner carries you the final hop into Vienna, while United tends to funnel PVD travelers through Newark or Dulles onto its own transatlantic metal—often a 767 or 777 with Polaris seating—before a connection via Munich or Frankfurt on Lufthansa. American, meanwhile, favors Philadelphia or JFK connections onto British Airways or Finnair, meaning you may find yourself in a Club Suite or an A350 seat before finishing the trip on a European regional jet.
Having flown this corridor repeatedly, my strong recommendation is to prioritize the PVD-to-hub leg on a mainline widebody rather than a regional jet, since United's Polaris seat out of Newark gives you lie-flat comfort and lounge access before the long haul, setting you up far better than a cramped CRJ into Boston. An insider trick few travelers use: booking the PVD–hub segment as a separate positioning flight a day early, staying overnight near the hub, and starting the international leg rested—this often costs little extra and dramatically improves how you land in Vienna, especially given the early-morning arrival patterns common on these European rotations.
January through March and again in October and November are consistently the softest months for premium fares on this routing, as Vienna's opera and holiday-market crowds haven't yet peaked and the summer festival rush has passed. Because pricing on connecting itineraries like this fluctuates unpredictably based on partner award space and hub routing, setting up automated fare alerts is genuinely the smartest way to catch a well-priced business class seat before it disappears.
