Singapore Airlines (SIA) generally handles bookings and support through their central online/phone systems rather than a dedicated, walk-in Lisbon office, directing you to their global support for services like reservations, KrisFlyer, and changes via their website or contacting their UK/global numbers, but you can find local travel agents in Lisbon for bookings. For direct SIA help, visit the Singapore Airlines Help Centre or use their app for quick chat, as they often manage via digital channels. Jauntlet.comhttps://jauntlet.com/