Are you intent on flying SW? Jetblue has had there schedule open to Jan 6th for months now. I am just patiently...kinda....waiting for them to open up their next block so I can book flights in Feb. That next block should include March break. And it should be opening sometime this month of the beginning of June.
I normally fly JB, have flown SW many times before, and find them to be very comparable. Happy flight shopping