Originally Posted by gitismatt
this is also the worst weather time of year for SFO, especially in the mornings and evenings.
also, getting between the terminals is pretty easy with the air train, but you do have to go through security again, and im sure the hour connection mentioned by the OP isnt enough to allow for that.
The shuttle between terminals at SO is ok, but slow. Don't bother going all the way out to the airtrain. If you wanted to go outside security the UA terminal is right next to the Int. terminal, so walking is quicker than the airtrain. I'm doing a SNA-SFO-HKG this week, with only 1 hour to get to the international terminal in SFO. Besides the weather concerns in SFO, I find that almost as frequently causing delays is late ARRIVING aircraft. From SAN to either LAX or SFO can be a crapshoot depending on where your plane will be arriving at SAN from.