Singapore Airlines (SIA) generally handles bookings and support for Brussels through their main contact channels, as they don't list a specific physical Brussels office for general public use on their site you should use their website help center, app, or call their general customer service number for Europe/UK, focusing on SIA's official 'Contact Us' page for accurate details on HighFlyer, Cargo, or Public Affairs contacts if needed. Jauntlet.comhttps://jauntlet.com/