Sicily's eastern coast, with Mount Etna looming over Catania's approach, rewards travelers who've figured out how to arrive rested rather than rattled — and that starts with routing. There's no nonstop option here: business class from Indianapolis to Catania always involves a connection, typically through a major European gateway or a domestic hub before crossing the Atlantic. In practice, that means Delta out of IND connecting via JFK or Atlanta into Delta One on a transatlantic widebody, or Lufthansa routing through Frankfurt or Munich with a shorter Lufthansa or Air Dolomiti-operated hop down to Catania, or Alitalia's successor Ita Airways (though not listed here, worth noting AZ codeshares run through Rome Fiumicino) connecting onward. Total journey time runs close to 15-16 hours door to door once you factor the connection, even though the transatlantic leg itself is roughly 10 hours.
I've found the Lufthansa routing through Munich particularly civilized for this itinerary — Munich's short connection times and dedicated business class security lanes make the transfer far less taxing than Frankfurt's sprawl, especially if you're catching an early continuation to Catania. Lufthansa's long-haul aircraft on the IND-adjacent transatlantic sectors increasingly feature the new Allegris business suites, though older configurations with direct-aisle access still appear depending on aircraft assignment, so it's worth checking your specific tail number before booking. Delta One via JFK gives you access to the Delta One Suite with a closing door on many transatlantic aircraft, and Atlanta connections often have more schedule flexibility for onward European legs.
Shoulder season — April, May, September, and October — is when this routing shines, both for Sicilian weather (warm without August's crowds) and for award and premium cash availability, since leisure demand to Catania spikes hard in July and August. My insider tip: book the transatlantic and the Europe-to-Catania segment as separate tickets when award space is tight on one leg but not the other; it complicates protection if something goes wrong, but it's often the only way to secure business class seats in shoulder season. Given how much fares and award space fluctuate on this multi-carrier routing, setting up fare alerts specifically for the IND-CTA corridor will save you from overpaying or missing the narrow windows when premium seats open up.