Originally Posted by
Thunderroad
1. Upon arrival we must exit TBIT in order to connect to UA domestic.
Upon arrival, you must exit TBIT because after you clear immigration and customs, you're dumped landside. This is the rule at all US airports.
Originally Posted by
Thunderroad
2. We walk to T4 and go through security there (presumably because it will be less crowded than going back through TBIT?)
That's what I would do. I might take a quick look at TBIT security line, but it's generally not a pretty sight. There's also transit security in TBIT, but they don't have true Pre and I'd rather just do the short walk to T4.
Originally Posted by
Thunderroad
3. We then use our SQ boarding passes as proof of international travel on a *A carrier, in combination with my UA *G status, to access the TBIT Lounge.
Nope. Your LAX-SFO BP and *G status will get you into *A lounge. Arriving BP will not.
Originally Posted by
Thunderroad
4. We then walk airside from TBIT to T7 for the LAX-SFO flight.
Yes - 20 minutes at an average pace.