This fare is available for travel any day of the week, 14-day advance purchase restriction, meaning the first day you can fly on this fare is for departures February, 7, 2018 and onward. There are some blackout dates around the President's Day Holiday weekend.
When searching on Virgin America we found seats departing BOS on Tuesday, February 13 and returning from SFO on Wednesday, February 28, 2018. Other dates are available on different airlines throughout the month of February.
Take a look at our Boston BOS departures page for a full list of fares we have found today.
Need a hotel in San Francisco? This is what is available for the above dates on Hotelwatchdog.