A list of events that occurred on October 31 (Halloween in the US) related to Six Flags.
- 1993
- Final night of Fright Fest 1993 and the 1993 season at Six Flags St. Louis.
- Final night of Fright Fest 1993 and the 1993 season at Six Flags Great Adventure.
- 2000 – Fright Fest 2000 ends at Six Flags AstroWorld.
- 2004 – Fright Fest 2004 ends at Six Flags St. Louis.
- 2006 – Fright Fest 2006 ends at Six Flags Magic Mountain.
- 2016 – Fright Fest 2016 ends at Six Flags Over Georgia.
- 2017 - Fright Fest 2017 ends at Six Flags St. Louis.
- 2018
- Fright Fest 2018 ends at Six Flags Great America.
- Fright Fest 2018 ends at Six Flags Great Adventure.