American Airlines has round-trip flights from Dallas (DFW) to San Diego or San Jose, California (SAN, SJC) for $97-$157, NONSTOP. Flights vary, but most are between the months of September and December. Extended weekends available.
Cheapest flights ($97) are to San Diego on Tuesdays. Other dates and destinations are about $140-$157.
Carry-on bag is allowed for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.