Singapore Airlines Flight SQ23 is currently the World’s longest non-stop flight, operated from Changi International Airport of Singapore to John of Kennedy (JFK) International Airport of New York, United States lasting around 18 hours and 40 minutes.
The World’s Longest Flight by Singapore Airlines from Newark to Singapore was launched on October 12, 2018 using the brand new Airbus A350-900ULR (Ultra Long Range).
However, the aviation landscape has changed so much since the pandemic, including many ultra-long-haul routes being suspended.
Now, since November 9, 2020 the Singapore Airlines flying three times a week to JFK will cover an impressive 9,537 miles.

Singapore Airlines flight SQ24 will depart Singapore Changi International Airport at 2:25am on Monday, Wednesday and Saturday, and arrive the same day at 7:30am with a flight time of 18 hours and five minutes.
Singapore Airlines flight SQ23 will depart New York JFK on Monday, Wednesday and Friday at 10:30pm and arrive in Singapore at 6:10am two days later.
The other longest non-stop flights are:
2. Los Angeles-Singapore, Singapore Airlines SQ37
First flight: November 2nd 2018
Flight distance: 14,144 km (7,621 NMI)
Flight time: 17 Hours, 50 Minutes
3. San Francisco-Bengaluru, Air India AI176
First flight: January 9th 2021
Flight distance: 14,004 km (7,562 NMI)
Flight time: 17 Hours, 45 Minutes
4. New York JFK-Manila, Philippine Airlines PR127
First flight: October 29th 2018
Flight distance: 13,712 km (7,404 NMI)
Flight time: 16 Hours, 40 Minutes
5. San Francisco-Singapore, Singapore Airlines SQ33
First flight: October 23rd 2016
Flight distance: 13,593 km (7,340 NMI)
Flight time: 17 Hours, 35 Minutes
6. Johannesburg – Atlanta, Delta Airlines DL201
First flight: August 1st 2021
Flight distance: 13,581km (7,333 NMI)
Flight time: 16 hours, 20 Minutes
7. Dubai-Los Angeles, Emirates EK215
First flight: October 26th 2008
Flight distance: 13,420km (7,246 NMI)
Flight time: 16 hours, 20 Minutes
8. Doha-Los Angeles, Qatar Airways QR739
First flight: January 1st 2016
Flight distance: 13,367km (7,218 NMI)
Flight time: 16 hours, 25 Minutes
9. Toronto-Manila, Philippine Airlines PR119
First flight: February 2nd 2019
Flight distance: 13,230 km (7,144 NMI)
Flight time: 16 Hours, 20 Minutes
10. Dubai-Houston, Emirates EK211
First flight: December 3rd 2007
Flight distance: 13,144km (7,097 NMI)
Flight time: 16 hours, 15 Minutes
(With compilation of Sam Chui Aviation & Travel)