18 hr ago
We are flying round trip Toronto to Singapore via San Francisco. We will pre-clear US customs in Toronto, so going over is fine, but coming back I understand we have to go through customs, claim and recheck bags and go thru security again. Arriving at 8:50 a.m. on United with a 2h 35m layover in San Francisco, do you think we have time for all that? Will we have to change terminals? Is there a shuttle or something to aid us? Thanks!