Singapore Airlines operates flights from San Francisco International Airport (SFO) and provides customer support to address passenger needs, such as flight inquiries, reservations, or assistance with travel policies. To contact Singapore Airlines at SFO, you can call their local customer service number, typically available on their official website or by calling their general support ... https://askforairlines.com/singapore-airlines/singapore-airlines-san-francisco-international-airport-sfo-terminal/