How long is the flight from Dubai to Dallas?

A random search for departure 28May 2009,Thu shows:

OPTION 1: DXB - LAX 16hr 35min

DXB - LAX Emirates Airlines Flt 215 Dep 08:20am Nonstop

Total Trip Time: 16hr 35min

1-way Economy fare US$ 920 + Taxes & Fees ~ US$ 78 = Total US$ 998 OPTION 2: DXB-LHR-LAX 21hr 55min

DXB - LHR Virgin Atlantic Flt 401 Dep 09:15am

LHR - LAX Virgin Atlantic Flt 023 Dep 03:10pm

Flight Duration: 20hr 30min; Layover Time: 1hr 25min; Total Trip Time: 21hr 55min

1-way Economy fare US$ 545 + Taxes & Fees ~ US$ 331 = Total US$ 876