Alaska Airlines is having a “buy one/get one” promotion for round-trip flights from San Antonio (SAT) to Seattle (SEA) for $114 per person, NONSTOP. Flights Tuesdays, Wednesdays, or Saturdays between January 07th – to February 12th. Enter the “LETSBOGO” discount code during booking. SALE ENDS AT MIDNIGHT 12/20/2019.
More details are on the Alaska Airlines promotional page.
Note: Carry-on bag is allowed for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.