Southwest Airlines Low Fare 2025. Use our low fare calendar to see the lowest fares currently available on each day for a month at a time. Visit southwest.com to view the southwest low fare calendar and find the cheapest airfare of the season.

To make sure you’re getting the best deal possible on your southwest flight, head straight for the southwest low fare calendar. A golf bag or skis in a container acceptable to southwest ® can be substituted for one checked bag.