How do I connect to Singapore Airlines? https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/61012/what-is-the-24-hour-hotline-for-singaporeair-sia-usa Connect with Singapore Airlines through many means, such as their website, mobile app, or customer support hotline at For US +For US. For the United States, call １(８６６)８８４-３３１５, and for the United Kingdom, call ()-. #singaporecustomerservice