Ibiza's tiny airport has no long-haul connections of its own, which means every seasoned traveler booking business class from Atlanta to Ibiza is really booking a two-airline itinerary through a major European hub. There is no nonstop option: Delta's own metal stops at the Atlantic, so the real routing decision comes down to connecting through Madrid on Iberia, London on British Airways, or Frankfurt/Munich on Lufthansa, then picking up a short intra-European hop into IBZ. Iberia's A330 and A350 business class, with its lie-flat seats and Madrid hub proximity to Ibiza (under 90 minutes flying), makes it my default recommendation for anyone prioritizing minimal connection stress. British Airways routes through London on its 777s and A350s in the Club Suite — a genuine door-equipped, fully private business seat — but the Heathrow-to-Ibiza leg often reverts to a domestic-style narrowbody cabin, so don't expect Club Suite the whole way.
Having flown all three combinations repeatedly, my strongest insider tip is this: route through Madrid rather than London or Frankfurt whenever schedules allow, since Iberia's evening arrivals sync beautifully with the last wave of Ibiza-bound flights, letting you clear immigration and rebook onto a same-day connection without an overnight layover — something Heathrow's congested T5 transfers rarely allow during peak season. Lufthansa flyers should note that Allegris cabins, where available on the transatlantic leg, offer some of the most customizable business seating in the sky, though the Munich-to-Ibiza connector is typically a standard short-haul configuration, so the luxury is front-loaded on the long-haul segment.
Seasonality matters enormously here: Ibiza's business class demand spikes hard from June through August when Europe's elite descend on the island, so April, May, September, and October reward patient travelers with noticeably better business class availability and fare stability on all three carriers. Given how much these fares swing month to month on this Atlanta–Ibiza corridor, setting up automated fare alerts is the smartest move you can make before committing to a routing.