Split remains one of the more delightfully inconvenient luxuries in transatlantic travel, and there's no way around a connection: no carrier offers nonstop service between Ohio and the Dalmatian coast, so business class from Columbus to Split always routes through a major hub, typically Detroit, Chicago, or Newark, before a second connection in a European gateway like Amsterdam, Paris, Munich, or Zurich. Delta, American, and United all serve this corridor via their transatlantic joint venture partners, meaning your long-haul segment is often the true business class experience, while the intra-European hop to Split runs on a regional aircraft with recliner-style business seating. Delta's One Suites on select 767 and A330 aircraft out of Detroit or JFK offer sliding doors and genuine privacy, while United's Polaris seats, found on 767s and 777s from Newark or Chicago, deliver reliable all-aisle-access comfort with proper bedding. American routes through its partners' European hubs as well, and its own 777 and 787 business cabins provide fully lie-flat seating with direct aisle access on most configurations.
The real craft in booking this route is choosing the right European connection city based on season. In peak summer, Split's airport gets overwhelmed with charter and low-cost traffic, so arriving on an early-morning wave from Munich or Zurich beats the midday crush considerably — I've found immigration lines at SPU triple in size between 11am and 3pm during July and August. My insider tip: if your itinerary allows a longer layover, choose Zurich over Frankfurt or Amsterdam for the second leg, since Swiss's short-haul business product to Split tends to have more consistent seat availability and less last-minute downgrading to economy-plus configurations, a quiet frustration on this route that veteran flyers rarely mention.
Shoulder season — April, May, September, and October — remains the sweet spot for both fare value and experience, avoiding the Adriatic's summer crowds while still delivering warm, golden-hour arrivals over the Split coastline. Given the multiple carrier and hub permutations possible from Columbus, fares on this routing fluctuate more than most transatlantic itineraries, so setting up dedicated fare alerts for this specific city pair is the smartest way to catch the periodic pricing dips before they disappear.