Green Airport's modest security lines belie the outsized planning required to get from PVD to Stuttgart in genuine comfort, since there's no nonstop option and never will be given the market size. Every itinerary in business class from Providence to Stuttgart routes through a major East Coast or European hub, with Delta, American, and United each offering credible one-stop connections via JFK, Boston, Philadelphia, or Newark before crossing the Atlantic. The most reliable factual takeaway for planning purposes: expect total journey times of roughly 12-14 hours including the connection, with the transatlantic leg itself running about 8.5 hours once airborne from a US gateway.
Having routed through all three carriers' networks over the years, I lean toward Delta's JFK connection when schedules align, since their A330 and A350 business class cabins with fully lie-flat Delta One suites make the long-haul segment genuinely restful, and JFK's Terminal 4 has matured into a smooth transfer point with dedicated Delta One check-in. United's option through Newark, using their Polaris business class on 767 or 777 aircraft, is worth considering if you're connecting onward within Star Alliance, since Lufthansa's Frankfurt or Munich hub can sometimes offer a same-alliance handoff into Stuttgart on a regional jet. American's routing typically funnels through Philadelphia and partners with British Airways or Finnair depending on the season, and their Flagship Suite product on select transatlantic aircraft is worth booking if you can secure it. My insider tip: build in at least a 2.5-hour connection window at any East Coast hub during winter months, since Northeast weather delays are the single biggest threat to making a tight European connection, and a missed connection here often means rebooking onto a much less desirable itinerary the next day.
January through March and again in October and November consistently produce the softest fares and best award availability on this corridor, as leisure demand dips and Stuttgart's automotive-industry business travelers thin out post-conference season. Given how much these fares fluctuate based on connection routing and cabin release patterns, setting up automated price tracking for this specific city pair is the smartest move you can make before booking.
