How long is the flight from Dubai to New York?

The shortest flight time directly from JFK to Dubai (DBX) is 12 hours and 30 minutes.
A random search for flights from DXB to JFK shows: OPTION 1: 13hr 45min Nonstop

DXB - JFK Emirates Airlines Flt 201 Dep 08:30am 23Jun,Tue

DXB - JFK Emirates Airlines Flt 203 Dep 02:00am 23Jun,Tue

Flight Duration: 13hr 45min

1-way Economy fare $885.oo + Taxes & Fees $78.oo OPTION 2: 17hr 00min via London Heathrow (LHR)

DXB - LHR American Airlines Flt 6416 Dep 02:00am 22Jun,Mon

LHR - JFK American Airlines Flt 0115 Dep 08:30am 22Jun,Mon

Flight Duration: 14hr 50min; Layover Time: 2hr 10min; Total Trip Time: 17hr 00min

1-way Economy fare $678.oo + Taxes & Fees $111.oo OPTION 3: 18hr 35min via Kuwait (KWI)

DXB - KWI Kuwait Airways Dep 07:25am 23Jun,Tue

KWI - JFK Kuwait Airways Dep 09:30am 23Jun,Tue

Flight Duration: 17hr 05min; Layover Time: 1hr 30min; Total Trip Time: 18hr 35min

1-way Economy fare $547.oo + Taxes & Fees $125.oo OPTION 4: 20hr 55min via Athens (ATH)

DXB - ATH Olympic Airways Flt 348 Dep 02:00am 22Jun,Mon

ATH - JFK Olympic Airways Flt 411 Dep 11:15am 22Jun,Mon

Flight Duration: 15hr 50min; Layover Time: 5hr 5min; Total Trip Time: 20hr 55min

1-way Economy fare $375.oo + Taxes & Fees $264.oo