Most travelers need 2 to 3 days in Palma itself: one for La Seu Cathedral and the old town, one for Bellver Castle and the waterfront. Add a third day, or more, only if a trip into the Serra de Tramuntana mountains is part of the plan -- that UNESCO-listed landscape is a separate day trip from Palma, not a neighborhood inside it.
Unlike every other city in this guide, Palma itself does not carry a UNESCO World Heritage listing. The island does have one, the Cultural Landscape of the Serra de Tramuntana, inscribed in 2011, but it covers a 90-kilometer mountain range along Mallorca's northwest coast, not the city. If a UNESCO site is specifically what you're after, treat it as a genuine day trip out of Palma, not something you'll stumble into downtown. What Palma does have instead is a genuine, well-documented architectural connection to the same architect behind Barcelona's Gaudí sites, and that's arguably the more specific reason to visit. La Seu Cathedral, below, has its own page covering exactly what Gaudí did and didn't finish there.
Two days covers Palma's core: La Seu Cathedral and the old town's narrow streets on one day, Bellver Castle, a hilltop Gothic fortress with genuine views over the bay, and the waterfront on the other. A third day is worth it if you want a slower pace, or if you're adding a half-day or full-day trip into the Serra de Tramuntana, where the UNESCO landscape's terraced agriculture and centuries-old water-management systems are the actual draw, not something visible from the city itself.
Palma's airport, Son Sant Joan, is operated by Aena. According to Aena's own routing information, city bus line A1 runs directly from the airport to the city center, terminating at Plaça d'Espanya, a central hub connected to the rest of Palma's bus network. The official Palma Tourism Board, Visit Palma, also runs tourist information points at both the airport and the city center for on-the-ground questions once you land.
Don't come to Palma expecting a UNESCO plaque on every corner the way you might in Seville, and don't skip La Seu assuming it's just another cathedral. The building has a genuine, documented Gaudí intervention inside it, the same architect whose Barcelona work carries seven separate UNESCO listings, and that's a more specific reason to spend genuine time there than the skyline photo most visitors settle for.
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