American Airlines has round-trip flights from Dallas (DFW) to Aruba (AUA) for $309-$312 with a connection. Flights in September, December, January, February, March, and April. Departures on Monday and Tuesday. Origin/Destination reversible. Holiday blackouts.
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.