As of March 2015, it is possible to buy tickets on Southwest's website. On the main page, simply enter your departure and arrival cities, dates of travel, number of travelers and any promotional codes. The site suggests flights based on the information entered.
Kayak also allows travelers to search specifically for Southwest tickets. If a customer decides to buy a ticket through Kayak, he is routed to the Southwest website. One advantage of Kayak is that it allows for comparison shopping through various online travel companies, such as Priceline, Hotwire, Expedia and Orbitz, so customers can get the exact travel packages they want.