Singapore Airlines (SIA) doesn't seem to have a dedicated physical office in Skopje, North Macedonia, but you can reach them via their global contact center at +1-866-829-1086, use their Kris the chatbot online, or contact Skopje International Airport (SKP) Information Desk at +1-866-829-1086 for airport-related queries about potential connecting flights or services. For bookings and general help, the Singapore Airlines website and their international hotlines are your best bet. Jauntlet.comhttps://jauntlet.com/