Seen below, we found seats departing San Francisco SFO on Tuesday, July 10, returning from New York JFK on Tuesday, July 17. Other dates are available for travel throughout the year.
This is a basic economy fare, but Delta will still include a normal sized carry-on bag plus one small personal item for this price. Upgrade to a main cabin seat for $25 each way if you'd like to choose a specific seat or have the ability to make changes. Otherwise, Virgin America/Alaska has this same fare for winter/spring/fall travel without those restrictions.
Lowest fares are found for travel on Tuesdays, Wednesdays, and Saturdays. Slightly higher fares ($237 round-trip) can be found any day/week, when available, through May.
Need a room in New York? Here's what's available for the above dates on Hotelwatchdog.