More than a century after the first commercial flight covered just 17 kilometers between St. Petersburg and Tampa, airlines now operate nonstop services that travel thousands of miles and last over 16 hours. Many of these ultra long-haul flights involve the United States and use aircraft such as the Airbus A350-900ULR, Boeing 777-200LR, A350-1000, and Boeing 787-9.
Singapore Airlines operates the longest widebody route from the US: New York JFK to Singapore Changi. According to Cirium, this service covers nearly 9,500 miles and is recognized as the world’s longest nonstop scheduled passenger flight. The airline uses an Airbus A350-900ULR configured with 67 business class seats and 94 premium economy seats. There is no economy class due to operational constraints on such a lengthy route.
"The Star Alliance member operates a daily flight in each direction, with an average block time of around 19 hours and 15 minutes. This includes taxi time, airborne duration, and minor delays." The second-longest US route is also run by Singapore Airlines between Newark Liberty International Airport and Singapore using the same aircraft type.