Alicante's Costa Blanca charm rarely gets the nonstop business class treatment American cities offer to Madrid or Barcelona, and that's precisely why savvy travelers route smart rather than direct. There is no nonstop service between Boston and Alicante, so business class from Boston to Alicante means connecting through London Heathrow via British Airways or through Madrid via Iberia, with American Airlines offering codeshare options on either partner's metal. My preference after years of testing this corridor is the Iberia routing through Madrid-Barajas: their A330 and A350 business cabins, with fully flat seats in a 1-2-1 configuration on newer aircraft, feel more spacious than BA's older Club World product on the transatlantic leg, and Madrid's T4 satellite building makes for a civilized connection with minimal walking before a short hop to Alicante.
British Airways routes through Heathrow Terminal 5, and if you're booked into their Club Suite—found on select 777 and A350 aircraft—you'll get a proper door for privacy, though not every BOS-bound aircraft has been retrofitted, so it pays to check your specific tail number before booking. The insider move here: Iberia's Madrid connection often clears you through a single security check if you're transiting internationally, saving 20-30 minutes that Heathrow's more labyrinthine terminal simply won't give back. Alicante's airport itself is refreshingly small and fast, with bags typically appearing within fifteen minutes of touchdown, a pleasant contrast to the chaos at bigger Spanish gateways.
Shoulder season—April, May, September, and October—consistently delivers the best value and comfort on this route, avoiding both the brutal summer heat on the Costa Blanca and the premium pricing tourists pay in peak July and August. Business fares to Spain's secondary cities fluctuate more unpredictably than to Madrid or Barcelona precisely because capacity is thinner, so setting up automated fare alerts for this specific city pair is the smartest way to catch a business class fare drop before it disappears.