Qatar Airways Boeing 777 -200LR- Doha to Auckland, launched in February 2017, is the current world’s longest flight. The flight covered the distance of 9025 miles between New Zealand and Qatar. Though, you could be air for more about 18 hours, but Qatar airways completes the flight between 16—17 hours.
Emirates 380 source from Dubai to New Zealand is an emirates Airbus known to be present longest non-stop flight in means of distance. The ride covered near about 14,200 km i.e. 8824 miles when it landed to Auckland, New Zealand. It was expected to be world’s longest flight by duration but it landed too early.
Further, Singapore Airlines had revealed last year to bring back its Singapore- New Jersey service in year 2018. The flight is expected to cover around 15,300 km (9500 miles) in 19 hours.
Included bit from the web
On March 14, French aircraft Air Tahiti Nui flew the longest at any point planned traveler trip by separation - traveling 9,765 miles over the world from Papeete, in Tahiti, French Polynesia, to Paris' Charles de Gaulle air terminal.