Common airline options for traveling from Buffalo Niagara International Airport (BUF) to Athens International Airport Eleftherios Venizelos (ATH) in September include combinations such as Delta/Air France/KLM via JFK and European hubs, Air Canada via Toronto, and Turkish Airlines via Istanbul for competitive transatlantic and intra-Europe connections. Aegean Airlines may serve the Athens leg for intra-European portions, and major carriers often partner to offer single-ticket itineraries for smoother transfers. When comparing airlines, weigh total travel time, luggage policies, seat availability, alliance benefits, and the ease of making protected connections. Use alliance status and partner awards if you intend to redeem miles; always verify baggage through-checking on multi-carrier itineraries for Buffalo to Athens flights.