Louisville's bourbon barons and healthcare executives heading to Valencia's Mediterranean coast face an unavoidable truth: there's no nonstop option, so booking business class from Louisville to Valencia means routing through a major transatlantic gateway, typically Chicago, Philadelphia, or Charlotte on American, or London Heathrow on British Airways and Iberia. In my experience shuttling this corridor for work, the smartest play is American's connection through Philadelphia into a joint-venture partner like British Airways or Iberia for the transatlantic leg, since both fly modern widebodies with genuinely competitive business hard products across the Atlantic. That transatlantic hop typically runs around 8.5 hours depending on winds and routing, and the SDF domestic segment adds only marginal time given Louisville's efficient, low-stress terminal.
The real prize on this itinerary is landing a seat in British Airways' Club Suite, now rolled out on many of their A350s and 777-300ERs serving Madrid or a European connection point—it's a genuine door-closing suite with direct aisle access, a marked upgrade from BA's older Club World cabins still flying some routes. Iberia, BA's sister carrier, offers its own A350 business class with lie-flat seats and solid Spanish hospitality once you're routing through Madrid, which is often the cleanest one-stop connection into Valencia given the short intra-Spain hop. My insider tip: if you're transiting Madrid-Barajas, build in at least 90 minutes even with a same-alliance connection, since immigration lines for non-EU passport holders can be unpredictable at T4, and missing the short VLC connector often means a multi-hour wait for the next flight.
Seasonally, April, May, September, and October reward patient shoppers with the best business class fares, as summer inflates demand toward Spain's coast and winter thins schedules. Given the volatility of fares on connecting itineraries with multiple carriers involved, I'd strongly recommend setting up automated fare alerts for this specific city pair rather than checking manually—award and cash pricing on this route can shift quickly with little warning.