JetBlue is offering these $39 one-way fares from late May through June 27, 2018. Flights are available on any day of the week, but departures on weekends are on the scarcer side. No minimum stay is required, and there are several flight options to choose from on available days.
I was able to find seats departing BOS on Thursday, May 24 and returning from PIT on Tuesday, May 29, 2018, which spans over the Memorial Day long weekend.
Have a peek at our Boston (BOS) flight deals page to see a list of current finds and for some travel inspiration.
Need a hotel in Pittsburgh? We've got you covered with this full list of available accommodations for the dates listed on Hotelwatchdog.