Singapore Airlines (SIA) generally operates through online channels and ticket agents rather than dedicated local offices in every city for Buffalo, NY, you'll likely use their main U.S. contact number or website for bookings, changes, and support, as the listed address (202 Elmwood Ave) seems to be a third-party contact number or virtual office for quick help, not a physical SIA branch. Jauntlet.comhttps://jauntlet.com/