Trip idea: San Francisco.
Southwest is running a special on flights between San Francisco and St. Louis.
- How much: $133 one-way, either direction of travel
- When to fly: Sept. 9 to Dec. 17, any day except Fridays or Sundays
- Blackout dates: Nov. 25, 26 and Nov. 29 – Dec. 1
- Booking deadline: Purchase tickets by Aug. 14