Riga isn't a market carriers rush to serve directly, and after logging enough segments through this corridor, I can tell you the routing choice matters as much as the fare. There is no nonstop option for business class from Las Vegas to Riga; every itinerary funnels through a major hub, and your two realistic strategies are a Delta connection via its Atlanta, JFK, or Minneapolis gateway into a transatlantic partner, or American Airlines routing you through its Philadelphia or Chicago hub to link with a European partner, before airBaltic finishes the job into RIX on its Bombardier CS300 or Airbus A220 fleet. airBaltic doesn't operate a dedicated long-haul business cabin, but its regional business class offers blocked middle seats and Riga-based service that feels distinctly Baltic — efficient, understated, no frills theater.
The real decision point is which widebody carries you across the Atlantic. Delta's Delta One suites, with sliding privacy doors on its A330-900 and A350 fleet, are worth routing for if your connection allows a JFK or Atlanta departure, while American's Flagship Suite on select 777 and 787 aircraft gives you similar door-equipped privacy out of Philadelphia. My insider tip: build in a 90-minute-plus layover in Riga's compact airport regardless of season, since airBaltic's connection bank from Western Europe can shift gate assignments late, and RIX's single-terminal layout means you'll want time to clear passport control without sprinting.
Seasonality favors the traveler heading into the Baltic summer — May through September sees the strongest inventory and best positioning for premium awards or discounted fares, largely because Riga's tourism season peaks and airlines add capacity accordingly. Outside that window, availability tightens as leisure demand fades and schedules thin. Given how few daily options exist end-to-end, and how much itineraries can shift week to week, setting up automated fare alerts for this specific city pair is the smartest way to catch a business class release before it disappears.