Perhaps for the still-common case of flying to an airport where Southwest doesn't go? Southwest gets to be cheap in significant part by only flying routes with

Perhaps for the still-common case of flying to an airport where Southwest doesn't go? Southwest gets to be cheap in significant part by only flying routes with enough demand to fill a 737. And on rare occasions another airline does beat Southwest's price. Sometimes I see flights in and out of JFK turn up cheaper on Delta.