Up To 18-Hour Nonstop Flights: United Airlines’ 10 New Ultra-Long Routes In 2026

United Airlines has more long-haul flights than any other airline worldwide. According to the carrier’s schedule submission to Cirium Diio, it plans an average of 148 daily long-haul departures in the first half of the year (double for both ways). Such activity has jumped by a reasonable 4% year-over-year.