Updated 03.05.2024
Here is a post of the links to each LA movie theater's film calendar. (See my sidebar for same if on desktop.)
Some of these actually show films on 35mm!
NEW ADDITION:
Academy Museum Best link I can find. It doesn't show the month, have to click through by week.
LA Film Calendars:
Egyptian Theatre (American Cinematheque -- filter by theater)
Los Feliz 3 (American Cinematheque -- filter by theater)
Aero Theatre (American Cinematheque -- filter by theater)
Brain Dead Studios (at the former Silent Movie Theater location)
Secret Movie Club (DTLA, multiple other venues)
Old Town Music Hall El Segundo (ticket link, but here's their site)
Esoteric or Avant-Grade
LosAngeles Film Forum (experimental film)
Rare Screening Schedules
Norton Simon Museum (This is pretty new to me, not sure it will become regular)
Academy(AMPAS) (Click "Month View" it's less confusing.)
LACMA (almost never now)
Specialty Theaters:
Vista Theater incl. 70mm and 35mm screenings
NuArt Theatre (click showtimes at top, it should default to NuArt)
Alama Drafthouse Cinema DTLA (try clicking "Month View" for easier browsing)
Arthouse Films in LA:
You might find a recent Cannes film here or there on their schedules amongst the mainstream fodder.
Hot tip: create a Fandango account and a "My Theaters" list and add these
Glendale
North Hollywood/San Fernando Valley
Laemmle NoHo 7 (scheduled to be demolished, but for now!)
Outside LA
The Last Real 70mm Non-Digital IMAX Cinema in LA
(not counting museums, but those won't play the Chris Nolan IMAX-shot movies usually)
Recurring Film Festivals
Classic
Cinecon (FB page)
Cinecon (FB page)
Labor Day weekend (This FB link may keep you up to date, their link was down)
(typically 1 weekend somewhere between April 5 and April 25)
Modern
AFI Film Festival (Roughly a week, late October)
LA Film Festival (Film Independent) Discontinued, but one can hope: