Originally Posted by
squeakr
https://www.tsa.gov/precheck/schedule
and if you plug in SFO on a weekday it looks like intl Terminal Checkpoints open at 4 AM.
If precheck is open I'm guessing one standard one is too.
I tried your link, but it's showing International Terminal Pre-check as being open starting at 5am?
Even it is open at 4am, that seems to be cutting it a bit close...