You're right. There are few sci-fi only fests. Which ones have you found?
Maybe we can fill in the blanks. I'd hate to give you a list of the few
sci-fi fests only to have you tell me you already know those.
I think most film festivals will accept films of all genres.
So far I've submitted to:
15 MInutes of Fame Orlando
300 Minutes Int'l
Access Code Film Fest (got in)
Anti-Hero Genre Fest
Austin Revolution Film Festival
Bare Bones Int'l
Big As Texas
Boston Sci-Fi
Capital City Film Fest
Chattacon (got in)
Clean Shorts Film Fest
Dam Shorts
Dawson City Shorts Fest
Down East Flick Fest
Eerie Horror Film Festival
El Dorado Film Festival
Festival of the Cinematics
FilmQuest
Flagler Film Festival (got in)
Fort Myers Film Fest
From the Beyond Con
Gasparilla
Glen Rose Neo-Relix Film Fest
Golden Palmera
Granite Planet Film Festival (got in)
Gurgaon Int'l Film Fest
iChill Manila (got in)
Incredifest
Innovative Horror Fest (got in)
Int'l Horror & Sci&Fi
Interurban Film Festival
Jameson Dublin Film Fest
Love Your Shorts
Macon Film Festival
Magic City Comic Con (got in)
Marfa Film Fest
Megacon
Miami Int'l Sci-Fi
Multiverse Film Festival
Open World Toronto Film Fest
Pensacon
Phillip K. Dick Int'l Fest
Phoenix ComiCon
Phoenix Film Fest
Reel Shorts Film Fest
Rincon Int'l Film Fest
Rio Grind
Sarasota Film Festival
Sci-Fi London
Shorts Shorts Asia
Siouxland Film Festival
Sunscreen Film Fest
SXSW
Tally Shorts Film Fest
Timegate Convention (got in)
Toronto Shorts Film Fest
Still looking to submit to:
Another Hole in the Head
Celludroid
Clermont
Fantastic Fest
Fantastic Planet
Fastasia Film Fest
French Fantasy Film Festival
Future Shorts
Grosmann Fantastic Film and Wine Festival
HorrorQuest
Melbourne Independent Film Fest
MisCon
Naples Film Festival
New York City Horror
Other Worlds Austin
PollyGrind
Roswell Int'l Sci-Fi
Sci-Fi Valley Con
Supercon
Tampa Bay Underground
Telluride Horror Show
Terror Film Fest
Toronto After Dark
Traverse City Film Festival
Unreal Film Fest
Vegas Indie Film Fest
Those are mostly either sci-fi fests, horror fests that feature sci-fi as well, or regular fests that mention sci-fi is accepted.