American Airlines has round-trip flights from Dallas (DFW) to San Francisco or Chicago (SFO, ORD) for $139-$159, NONSTOP. Flights April to May. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible.
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.