Searching on Delta we found seats departing BOS Wednesday, February 28 and returning from AUS Saturday, March 3, 2018. This fare is valid for travel up to March 7, with a 21-day advance purchase restriction. Travel any day of the week if available.
See our Boston BOS fare deal page for a complete look at current finds.
Need a room in Austin? Here is what's available for the listed dates on Hotelwatchdog.