There's no nonstop way to bridge Nashville and Croatia's Dalmatian coast, which means the real craft of this itinerary lies in choosing your connection wisely. Business class from Nashville to Split will always route through a major hub, and the three most sensible carriers to build this trip around are Delta, American, and United, each of which can position you into Europe via their transatlantic partners before a final hop down to Split. Delta's strongest play routes through Atlanta and then a European gateway using Delta One suites with sliding privacy doors on widebody aircraft, while United typically funnels through Newark or Chicago onto Polaris-equipped 767s or 777s into Frankfurt or Munich, and American leans on its Philadelphia or Charlotte hubs connecting to London or Zurich in Flagship Suite. Total journey time hovers around 11.5 hours of pure flying, but budget closer to 14-16 hours door to door once you factor the connection, since Split's airport (SPU) itself has no long-haul widebody service — everything funnels through a European gateway with a short regional jet or turboprop finishing the job.
The insider move here is choosing your last-mile carrier carefully: flying into Split via Munich or Zurich on a Star Alliance or oneworld regional partner tends to have far more reliable baggage transfer times than routing through Frankfurt, where tight connections during the June-August surge can mean your business class checked bag misses the final short hop entirely. I've had better luck personally clearing customs and rebooking a missed connection in Zurich than in the chaos of peak-summer Frankfurt. If your outbound long-haul lands late morning, aim for a same-day final leg rather than an overnight in the hub — Split's small airport gets congested with charter traffic in high season, and arriving early avoids the worst of it.
Shoulder-season months — April, May, September, and October — reward patient shoppers with noticeably better business class availability and calmer connections, since Split's tourist crush eases just enough to loosen award and revenue seat inventory alike. Given how much these fares swing based on hub routing and seasonal demand, setting up automated fare alerts for this specific Nashville-to-Split business class itinerary is the smartest way to catch a favorable pricing window before it closes.
