This is an amazing price for a cross-country route in regular Economy, meaning you can take that carry-on free of charge!
Searching on United we found a few seats available for travel departing Saturday, May 5, returning on Wednesday, May 9, 2018. Other dates were available from early February through mid-June. But go visit our San Jose (SJC) fare page for a full list of other destinations.
If you are need of a place to stay in Boston during the above dates, make sure to check Hotelwatchdog for great rates.