Delta and United Airlines have a low $746 round trip fare from San Francisco and Los Angeles LAX to Dubai for departures beginning in September, with low fare dates all the way to May 2016.
A variety of routings are available using SkyTeam partners like Air France and KLM and Star Alliance partners like Swiss and Lufthansa for around $30 more round trip.
Lowest fares tend to be for Monday to Thursday departures, although weekends are only about $50 more and some weekend dates are less than $10 more round trip.
There were similar fares offered with United and Delta in April 2015.
United Airlines San Francisco SFO – Washington D.C. IAD – Dubai DXB
$745.80 December 2-9, 2015
United Mileage Plus 18,974 PQM and $645 PQD in economy K class.
Delta Airlines San Francisco SFO – Atlanta ATL – Dubai DXB
$745.80 October 6-13, 2015
Delta SkyMiles 19,476 MQM and $645 MQD in economy V booking class.
Google Flights SFO-DXB Delta Airlines $746