Valencia rarely tops the list of Spanish cities Americans fly business class to, which is precisely why the routing rewards those who know it well. There is no nonstop option: business class from Nashville to Valencia routes through either Charlotte or Dallas-Fort Worth on American Airlines metal, connecting to a transatlantic gateway like London Heathrow, Madrid, or Miami before the final hop to VLC. The most consistently comfortable itinerary I've flown pairs American's domestic first-class cabin from BNA with a transatlantic leg on British Airways' Club Suite, the airline's fully enclosed, direct-aisle-access seat rolled out across its 777 and A350 fleet — a genuine upgrade over BA's older Club World product, so it's worth checking your aircraft type at booking. Iberia is the other logical partner, routing through Madrid-Barajas with connecting service to Valencia on its regional network, and Iberia's A330 and A350 business class (lie-flat with direct aisle access on the A350) makes Madrid a smooter connection point than most people assume, especially given Iberia's dedicated business lounges in Terminal 4S.
Total journey time typically runs 14 to 17 hours depending on connection length, so I favor London or Madrid over Miami for this specific pairing — shorter ground time and better lounge access. If routing through Heathrow, aim for a minimum 90-minute connection in Terminal 5 and use the Galleries First lounge if your itinerary qualifies; if through Madrid, Iberia's T4S lounges are underrated for a proper sit-down meal before the short Valencia hop. One insider tip: Valencia's regional flights from Madrid are often operated by Iberia's regional partners with recliner-style business seating rather than lie-flat, so the "real" business class experience happens on the transatlantic leg — plan your splurge accordingly.
Shoulder season — April, May, September, and October — consistently delivers the best combination of fare and weather, avoiding both the August Spanish holiday crush and the winter lull in transatlantic premium demand. Because pricing on this three-airline route fluctuates with Heathrow and Madrid connection availability rather than direct competition, setting up fare alerts is the smartest way to catch a business class fare worth booking before it disappears.