American Airlines has round-trip flights from Dallas (DFW) to Monterrey, Mexico (MTY) for $213, NONSTOP. Flights January to March. No Weekends. Departures on Monday, Tuesday, Wednesday, and Thursday.
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.
Read More Nonstop Flights: Dallas to Monterrey, Mexico $213 r/t [January-March] – American Airlines