Want to know what are the longest flights in the world? Singapore Airlines currently operates the longest one—New York to Singapore—lasting almost 19 hours over a distance of 9,537 miles. This ultra-long-haul route sets the standard for comfort and endurance in modern aviation. Other notable routes include Dallas to Melbourne, Auckland to Dubai, and London to Perth. In this 2025 update, explore the complete list of the world’s longest flights, including their distances, durations, and airlines. Whether you’re fascinated by air travel or planning a global adventure, this guide provides everything you need to know about the farthest journeys in the sky.