When Does 6 Flags Open 2025 Season. Parks across the us are posting their 2025 opening dates, so we’re. Six flags opens daily starting may 22 through labor day, weather permitting.

Parks across the us are posting their 2025 opening dates, so we’re. While the exact date varies by park, generally, you can expect six flags parks to begin their 2025 season in late march or early april. Six flags opens daily starting may 22 through labor day, weather permitting.