Frontier has round-trip flights from Dallas (DFW) to Orlando (MCO) for $97-$117, NONSTOP. Flights in May, August, September, October, and November. Weekends available. Origin/Destination reversible.
Note: Frontier fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.