Mykonos rewards patience, and nowhere is that more true than in the routing logic required to get there in comfort. There is no nonstop option for business class from Philadelphia to Mykonos, since JMK's runway can't accommodate widebody aircraft — so the real decision happens at the connecting hub, not the final approach. My preferred build is Lufthansa via Frankfurt or Munich, where the newer Allegris business seats (on select 787 and A350 routes) offer sliding privacy doors and genuinely restful bedding for the transatlantic leg, before dropping into a short Aegean or Lufthansa CityLine hop to Mykonos. British Airways via London Heathrow, using Club Suite with its own door and direct-aisle access on the 787 and A350 fleet, is the other strong play, particularly for travelers who want a Heathrow stopover to break up the journey. Aegean Airlines, meanwhile, becomes essential for the final short sector into JMK, and their business cabin — while regional in scale — is a comfortable, well-catered way to finish an 11-hour-plus itinerary.
What separates a smooth trip from a stressful one is Athens. If your routing funnels through ATH before the Mykonos hop, build in at least a two-hour buffer — the domestic-to-international transfer process there is efficient but not instant, especially in July and August when Aegean's short-haul frequency to the islands peaks and gates fill quickly. My insider tip: fly into Mykonos on a mid-morning Aegean connection rather than late afternoon, since island-bound thunderstorms build over the Cyclades later in the day and can cascade delays through the small JMK airport, which has minimal buffer capacity for irregular operations.
Seasonally, April, May, September, and October are the sweet spot — shoulder-season demand from Frankfurt, Munich, and Heathrow softens considerably once peak summer traffic clears, and Aegean adds extra Athens-Mykonos frequencies without the crowds. Given how much fares fluctuate across these three carriers and their hub cities, setting up automated fare tracking for this specific city pair is the smartest way to catch a business class fare dip before it disappears.