Bourbon country and Bavaria make an odd but increasingly viable pairing for premium travelers, and after routing this journey more times than I can count, I can say with confidence: there is no nonstop option, so business class from Louisville to Nuremberg always involves at least one connection, typically through a major East Coast or Midwest hub before crossing the Atlantic. Delta routes most naturally through Atlanta or Detroit into Amsterdam or Paris, American funnels through Charlotte or Philadelphia into Frankfurt or Munich, and United leans on its Chicago or Newark hubs into Frankfurt or Munich as well — from any of those German gateways, the final hop to Nuremberg is a short regional connection, often on a partner carrier. The actual transatlantic leg runs roughly 8.5 hours in the air, and your comfort hinges entirely on which widebody product you land: Delta's A330-900 or A350 with Delta One suites offers full-suite privacy with a closing door, American's 777-300ER and 787-9 Business Class deliver Reverse Herringbone seating, and United's Polaris seats on the 767 or 777 give you direct aisle access on most configurations.
My routing preference after years of testing this corridor is Delta through Amsterdam-Schiphol into Nuremberg, since Schiphol's connections to smaller German cities tend to run smoother than Frankfurt's often-congested Terminal 1 during peak morning banks. If you're transiting Frankfurt instead, build in extra buffer time — immigration and security recombination for onward Schengen flights can eat 45 minutes you didn't budget for, especially in summer. An insider trick few travelers know: Nuremberg's small airport (NUE) clears bags and customs remarkably fast, so even a tight 60-minute connection back toward the US on the return leg is manageable if your inbound European carrier lands on time.
Seasonality favors the patient traveler here — January, February, March, October, and November consistently produce the most attractive business class availability and pricing, as this isn't a leisure-heavy route and airlines adjust award and revenue inventory accordingly outside summer's Oktoberfest-adjacent surge. Given the multiple viable routings and carriers in play, this is a route where setting up automated fare alerts pays real dividends, since the right combination of hub, aircraft, and season can shift week to week.