Direct nonstop flights from Logan International Airport (BOS) to Athens International Airport Eleftherios Venizelos (ATH) are uncommon; most travelers use connecting itineraries via London, Paris, Frankfurt, or Istanbul. Pros of connecting flights: typically lower fares, more schedule options, and potential loyalty program award availability. Cons: longer total travel time and increased risk of missed connections—allow sufficient layover time. If you prioritize speed and convenience, look for minimal-connection itineraries with reputable carriers; if price is the priority, a longer one-stop route often reduces cost. Use the search phrase 'best connecting flights Boston to Athens in May' when comparing options.