The Dallas-based carrier is adding two new routes as part of its schedule extension. The new routes are San Diego to Fresno, California, and Austin to Jacksonville, Florida.

The airline has just added more nonstop flights and increased service in key U.S. cities, including San Diego, Austin and Nashville, through November 2025.

Southwest is adding more flights in its schedule from Columbus to San Diego – and a few other destinations. John Glenn Columbus International Airport's busiest airline will expand its flight options this fall.

Southwest just extended its schedule, so now is an excellent time to book Southwest flights through Nov. 1, 2025, at low rates.