A somewhat related non stop question... Is there any way to tell when southwest offers non stops when it's seasonal or limited days? Example is Pit to Cancun which ends in early April and till then is only Saturday only. Found this by clicking through the calendar by having difficulty finding other non stop routes like Myrtle Beach which apparently is seasonal and may be only certain days a week.

I Normally would use Google Flights calendar view filtered on non stops on an airline but apparently Southwest doesn't appear on this view and Southwest own website I don't see how to calendar view only on non stops.