TPE-SFO-YYC Customs Question
Hey guys,
My parents are planning a trip from Calgary (YYC) to Tapei (TPE) and could save $400 if they fly United but they don't want to deal with the hassle of clearing US customs on the way back.
If they fly United, they would land in SFO and have about a 3 hour layover. Do you know if they will have to clear US customs?