Alaska, Jet Blue and Delta Airlines have round trip non stop airfares travelling to and from New York (JFK) and San Franicsco (SFO) for $197
Depart SFO Jan 8 -14--- Depart JFK Jan 13-19
Depart SFO Feb 18-21 --- Depart JFK 23-26
Depart JFK Jan 8-11 --- Depart SFO Jan 13-16
Depart JFK Feb 19-24 --- Depart SFO Feb 24-29
and wide dates availability in the month of January and February.