Southwest Low Fare Calendar 2025 July 2. The southwest fare calendar is open through march 5, 2025, so you can book flights out almost 9 months in advance. The southwest low fare calendar is a feature on the southwest website that allows you to search for flights on specific dates and view the lowest fares available for those dates.
Points bookings do not include taxes,. Itโs easy to use and will quickly show you all the dates and best options for cheap flights.