The Southwest low-cost flight calendar is a useful tool for budget travel planning. You can use the Southwest Airlines Low Fare Calendar to examine all of the low-cost return and departure options that suit your needs. You can also compare flights on many dates and use features such as the lowest possible rates, anytime pricing, Business Select, and more to discover the best offer. After you've purchased your tickets, you can return them at any time. Plan the original and expected destinations carefully to assess the ramifications. Use the low fare search if you want to book a flight within the next month or double-check the lowest costs.