B ...ummm... idk one with a b

I can think of one off the bat.

B: Blair Witch Project (1999)

c: Child's play

D: Dracula

E: The Exorcist
F: Friday the 13th
G: Ghost Ship

H: Halloween
I: I Know What You Did Last Summer

J: Jeepers Creepers

K-(Does King Kong count? :P) Killers, the
L-Leatherface (If that counts... >.<)
My Bloody Valentine
N-Nightmare on Elm Street

O - The Omen

P-Paranormal Activity (1, 2, or 3)

Q-Quarantine

R - [Rec]

S-silent night, deadly night
T-They Live

U.. hmmm.. no idea.. :|

U- Underwold
W- When a stranger calls

X - Umm... no idea. I'd say Jason X, but it doesn't begin with X lol, so..

Y-You're So Dead