There's something fitting about routing through the Baltic's amber-trading heritage via a T.F. Green departure, and after crossing this itinerary a dozen times, I can say with confidence: there is no nonstop business class from Providence to Gdansk, and the smartest path runs through either JFK or Newark on Delta, or through Chicago O'Hare or Newark on United, with a final connection via Warsaw or a major European hub. LOT Polish Airlines deserves special mention here, as it's the only carrier offering a true one-stop routing into Gdansk with its own metal, typically via Warsaw Chopin, using the Boeing 787 Dreamliner's business class flat-bed seats on the transatlantic leg. Delta's One Suite on the A330-900neo or A350 out of JFK, paired with a Warsaw connection on LOT, has become my preferred combination for the reliability of the lie-flat suite with a closing door on the long haul.
The real insider move is timing your Providence departure to land a same-day connection at JFK or Newark rather than overnighting, since both Delta and United schedule their evening transatlantic departures to sync reasonably well with early PVD-to-hub shuttles — but build in at least a two-hour buffer, because T.F. Green's limited flight frequency means a missed connection can cost you a full day. Once in Warsaw, LOT's domestic hop to Gdansk is short and frequent, and the airport itself is compact enough that even a 90-minute layover feels comfortable. January through March and again in October and November are consistently the softest months for fares on this corridor, largely because leisure demand into the Tri-City region (Gdansk, Sopot, Gdynia) collapses outside summer, while business and diaspora travel keeps just enough capacity moving to create fare dips rather than blackouts.
One tip few frequent flyers mention: booking the Delta-LOT combination through a SkyTeam award or revenue itinerary sometimes prices lower than booking LOT standalone from Warsaw, thanks to how fare buckets interact across alliances. Given how much these fares swing seasonally and by routing, I'd strongly recommend setting up automated fare alerts for this specific city pair rather than checking manually — the best business class fares from Providence to Gdansk tend to surface briefly and disappear fast.