Southwest periodically make flights for further in the future available. Today they have added flights until March 6, 2019. On August 16th, 2018 they will open the schedule until April 5th, 2019.
Southwest has a pretty good cancellation/refunds policy, depending on the fare you’ve booked you’ll either receive a credit towards a future flight(Wanna Get Away) or cash refund (Business Select or Anytime – returned to credit card if you used one). That means it’s often best to book flights as soon as they become available and periodically check to see if the price has decreased, if it has you can click ‘change flight’.
