The only U.S. carriers that serve Dubai are the cargo ones. UPS, Fedex, Atlas, Kalitta, etc. No European or Middle Eastern carriers allow jumpseaters like they do in the States so unless you can get on the cargo boys you'll be out of luck. EK starts their second daily flight from JFK in a couple of days. It is pretty lightly booked so far, so you would definitely be able to get on standby with a ZED or ID90 type ticket.