Yo check ticket prices for Southwest Airlines online, enter the departure and arrival cities, travel dates, number of passengers and promo code, if applicable, under the Flights tab on the Southwest home page. If you have flexible travel dates, click the Flights link, and choose the Low Fare Calendar option.
Southwest Airlines doesn't travel to all airports. If you're not sure if your departure or arrival airport is accessible through Southwest, start typing the city name into the corresponding box in the Flights search section. The names of matching airports with Southwest flights appear as you type. Click the name of the desired airport when it appears to select it for your search. Click the Search button after entering all search criteria.
The results page shows all available flights that match the search criteria. Information listed for each flight includes departure and arrival times, the flight number, layovers, travel time and available fares. Select the flights you want before clicking Continue. The resulting page details the flight information and the costs.
Traveling on specific dates can limit the options and mean higher fares. Southwest offers a Low Fare Calendar that shows fares on several different dates. Select the departure and arrival cities, the month you plan to travel, and the number of passengers. All available flights for that month appear on a calendar, with the price for each day listed in that calendar square.