Both AA and JetBlue offer JFK-LGB. My guess is that there probably isn't enough of a market for SNA-NYC since fares out of LGB are dirt-cheap on both airlines. AA even gives double miles for now although it is on a 757. Another thing to consider is departures out of SNA shut down at 10 (arrivals at 10:30), which is still somewhat early for red-eyes. Of course an airlines does not have to offer a red-eye, but my guess is that is one of the reasons. In 2003, the limit of flights in SNA will be raised by 8 additional flights and maybe someone will jump in then. They should simply make it an international airport and SNA-MEX flights will be full. AS tried SNA-YVR for about a month, but now that flight goes via SEA.