American Airlines, jetBlue, and Delta have round-trip flights from Austin (AUS) to Boston (BOS) for $158-$188, NONSTOP. Flights August to December. Extended weekends available. Origin/Destination reversible. No Christmas dates available.
A Carry-on bag and also a personal item is allowed for free on Delta and American. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Click for more details and booking links Nonstop Flights: Austin to/from Boston $158-$188 r/t [August-December] (No Christmas) – American Airlines / Delta / jetBlue