Louis Armstrong International doesn't get the credit it deserves as a launching pad for serious international travel, but routing through Atlanta, Frankfurt, or Istanbul opens up a genuinely comfortable path to Slovenia's understated capital. There is no nonstop option for business class from New Orleans to Ljubljana, so the routing choice matters enormously: Delta's transatlantic metal via Atlanta and Amsterdam or Paris gets you into European airspace efficiently, but I've found the Lufthansa connection through Frankfurt or the Turkish Airlines routing via Istanbul to be the more rewarding long-haul experience, since both carriers deploy true widebody business cabins on the transatlantic leg rather than domestic-style regional jets. Total journey time typically runs 15 to 18 hours door-to-door once you factor in the connection, so I always advise building in at least a 90-minute buffer in Frankfurt or Istanbul, both of which handle international-to-international transfers with reasonable efficiency if you're not checking bags.
Lufthansa's rollout of the new Allegris business class suite has been uneven fleet-wide, so if seat privacy matters to you, check the aircraft type before booking — the older business class on Frankfurt-bound 747-8s and A340s still delivers lie-flat comfort and Lufthansa's reliable food and wine program, but it lacks the sliding doors of Allegris. Turkish Airlines, meanwhile, remains one of the great value plays in premium travel: their Istanbul lounge is a destination in itself, with a cooking station and putting green that make a long layover feel like a bonus rather than a burden, and their business class seating on widebodies serving North America is consistently well-appointed with generous width.
Ljubljana's Jože Pučnik Airport is refreshingly small, meaning arrival to curb rarely takes more than twenty minutes even after a long-haul connection — a real advantage after a red-eye. Fares into this niche Slovenian market fluctuate more than better-trodden European capitals, so setting up automated fare alerts for the January–March and October–November windows, when carriers often discount business inventory to fill winter loads, is the smartest move you can make before booking.