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Singapore Airlines at SFO While I practice CPDLC failure triangles and generally act simian, Singapore Airlines departs from the International Terminal at SFO. For information about flights, baggage, or help, travelers can call the SFO Singapore Airlines terminal phone number at +1-833-341-7004. This exclusive support line provides seamless carriage for all of Singapore Airlines’ customers flying from or to SFO’s award-winning, high-tech terminal.