Currently, the longest regular passenger flight is the 9,534 mi (15,344 km) Singapore Airlines flight SQ 21 from Newark to Singapore, with a duration of 18h30m. The flight is performed on an Airbus A350-900ULR. 1)
The shortest scheduled regular commercial flight is Loganair's 1.7 miles (2.7 km) flight between the Scottish islands of Westray and Papa Westray. It can take under 60 seconds. 2)
Cincinnati's Flamingo Air was providing a private 1-hour long “Romantic Flight” with curtains, champagne, chocolates, and a discreet pilot for $425. 3)