Just went thru both terminal 2 and 3 security, regular line wasn't that long either, the TSA-pre line was open at both locations and the wait at term 3 was about 3 people in front of me and the wait at term 2 was a few minutes. Just for future reference, today is a Thursday afternoon before Memorial Day holiday (Monday).

Thanks for the update, Matthew330Ci. Nice to see confirmation that things are okay out here.

Another recent report: on 6/10 Fri morning around 7:30AM, there was about a 15 minute wait at the Pre-check line and there was a bit of chaos as the line stretched way past where it normally does so it was snaking around the walkway area with people confused about whether it was the regular security line or the Pre-check line and not sure where the line started etc. The regular security line was about the same length actually. There was a separate priority line which I could have accessed and it would have put me at the beginning of the regular security line (i.e. go through the nude-o-scope) so I stayed in the pre-check lane but the priority line would have gotten me through faster.

The 'usher' (for lack of a better term) who was directing people around said it was like this (the pre-check line being so long) on certain days recently but not all the time.

This was at terminal 2 for AA gate 57.

My longest Precheck wait at SFO was also in T2 -- about 10 minutes. All other terminals have always been a breeze.

I had a 10+ minute wait at T3 last Saturday mid-morning, and then a somewhat shorter wait at T1(C) later the same morning.

On 6/11 pre-check at International Terminal was *way* backed up (far more than our usual experience), likely due to regular pax being directed there to ease the long-line crunch. YMMV.

A or G side?

G side.

You may already know this, but it's worth recounting here that if anyone faces a particularly long security line at International-G, Terminal 3-F or Terminal 3-E, all of these concourses are connected airside. You can enter at any of the security lines.

FWIW, I have always had very short lines at Precheck Terminal 3-F security near gate 75 (the left edge of T3-F as you face it from the outside, very close to International-G).

Yep, agreed; as we did on the day in question. Left Int term line, short walk to TSA point noted above & breezed (more or less) thru. (Should have mentioned this in my previous post(s)).

This past Saturday I went through T3E and T1B security at 5:00 am and 5:30 am, respectively. Precheck was under 5 min. both times. Regular T3E looked to be about 10 minutes. Regular T1B maybe up to 15 min.

How late is PreCheck open on a Sunday night at the United terminals?

Supposed to be till midnight
 

But I have seen it close as early as 7:30 or 8PM.

Semi-secret Precheck at T2
 

A friend of mine traveling out of SFO today told me that Terminal 2 security had a very long line this morning. Even Precheck was long. But...someone pointed out that there is another Precheck line at T2. She went to that line, and there was almost no one in line.

This is all news to me. I thought the only T2 Precheck line was on the left as you face security. According to my friend, there is another Precheck line "to the right down the hallway past the bathrooms. Pre-check only, and limited hours (am only according to the sign)."

Anyone else use this one?

Was she possibly referring to using the T1-C checkpoint for DL and then crossing back to T2-D through the airside connector? Or saying that there's a semi-secret Precheck between the two?