John Wayne Airport isn't built for transatlantic ambition, which is precisely why the routing puzzle from SNA to Seville rewards careful planning. There's no nonstop, of course—no carrier flies that distance from a single-runway Orange County field—so business class from Orange County to Seville always means a connection, typically through Dallas or Chicago on American, London Heathrow on British Airways, or Madrid on Iberia. Fact worth banking: the most reliable premium routing pairs an American Airlines domestic business class hop out of SNA with a transatlantic long-haul in either BA's Club Suite or Iberia's A330 business class, landing you in Seville via a short intra-European connection since Iberia doesn't fly widebodies directly into SVQ.
Having routed this trip more times than I can count, my preference leans toward connecting through Madrid on Iberia rather than funneling through Heathrow. Iberia's A330 business class, with its direct-aisle-access staggered seats, is a comfortable long-haul product, and Madrid-Barajas makes for a far less chaotic connection than Heathrow's Terminal 5, especially if you're arriving jet-lagged and need a quick hop down to Seville on an Iberia regional jet. If you do route through London, BA's Club Suite—with its sliding door and proper storage—is worth the extra connection time, but budget generously at T5 given security queues. One insider trick: booking the SNA–hub segment as a separate American Airlines award ticket, then a paid Iberia business fare across the Atlantic, often unlocks better seat availability than a single through-fare, since Iberia releases premium inventory unevenly across booking classes.
Seville itself rewards shoulder-season timing—April and May bring orange blossoms and manageable heat, while September and October offer harvest light without the August infernal temperatures Andalusians warn you about. Fares on this corridor swing meaningfully with school holidays and Feria de Abril demand, so rather than guessing, set up automated fare tracking for the SNA–SVQ corridor; premium cabin pricing on connecting itineraries through Madrid, London, or the Texas hubs shifts often enough that a well-timed alert can save you from booking on the wrong week entirely.