Kayak is a good search engine to look for airfares and available flight times. It includes a link to Southwest as well as to Priceline, Orbitz, and Travelocity. If one can travel to an airline's hub city, then one will find cheaper airfares, more nonstops, and more choices on flight times. Of course, you have to factor in the cost to travel to that hub airport and the cost of parking.