Valencia rarely appears on the nonstop route map from the American Midwest, and that's precisely what makes booking business class from St. Louis to Valencia such an exercise in strategic routing. There is no direct service, so the journey inevitably funnels through a major hub — and here the choice matters enormously. American Airlines flyers should route through Philadelphia or Dallas-Fort Worth to connect onto joint-venture partner British Airways or Iberia metal into Madrid or London, then take a short intra-European hop down to Valencia. My preference after years of testing this corridor is the Iberia routing through Madrid: their A330 and A350 business class cabins, with lie-flat seats and a genuinely Spanish culinary program, make the connection feel like part of the trip rather than a chore, and Madrid-Barajas' T4 satellite is one of Europe's smoother connection experiences.
British Airways offers an alternative worth considering for loyalists of the Club Suite, their fully enclosed, door-equipped business class seat now installed on many 777 and 787 aircraft flying transatlantic into Heathrow. From there, a same-day BA or Iberia connection to Valencia is straightforward, though I'd budget extra time at LHR, particularly if arriving into Terminal 5 and connecting onward from a different terminal complex. My insider tip: fly the STL–PHL–MAD–VLC combination on a Tuesday or Wednesday departure when possible — midweek transatlantic loads on the Philadelphia-Madrid sector run lighter, increasing your odds of a same-day upgrade clearing on AAdvantage awards.
Seasonally, April, May, September, and October reward patient travelers with the most favorable business class fares, as these shoulder months avoid both summer's Mediterranean crush and the holiday surge. Valencia's own climate cooperates beautifully with this window — warm enough for terrace dining, cool enough to avoid the August exodus. Given how fare levels on this three-airline corridor fluctuate week to week depending on Atlantic joint-venture pricing strategies, setting up automated fare alerts remains the smartest way to catch a premium-cabin opportunity before it disappears.