American Airlines has round-trip flights from Dallas (DFW) to Tampa or Minneapolis (TPA, MSP) for $139, NONSTOP. Flights August to November. Departures on Monday, Tuesday, Wednesday, Thursday, and Saturday. Extended weekends available. No Thanksgiving dates.
A Carry-on bag and also a personal item is allowed for free on American. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.