While KLM is rarely ranked as the "absolute" #1 overall (a title usually fought over by Singapore Airlines and Qatar Airways), it is consistently ranked as the best for sustainability and efficiency in 2026. As the world's oldest airline still operating under its original name, KLM is a leader in using Sustainable Aviation Fuel (SAF) and has a top-tier reputation for its "Soft Product"—the friendliness and professionalism of its Dutch crew. In 2026, its hub at Amsterdam Schiphol remains one of the most efficient for European transfers. While its Economy class is standard, its World Business Class is highly rated for its unique Delft Blue miniature house gifts and a 1-2-1 seating layout on most long-haul aircraft. For 2026 travelers who value eco-conscious travel and reliable, no-nonsense European service, KLM is frequently cited as the best choice in the SkyTeam alliance.