Singapore Airlines offers several check-in options to make travel easy. Online and mobile check-in opens 48 hours before departure and closes 1.5 hours prior. Passengers can use the website or mobile app to select seats, add baggage, and get a digital or printable boarding pass. Self-service kiosks are available at many airports from 24 hours before the flight until 50 minutes before departure, allowing passengers to print boarding passes and baggage tags. Airport check-in counters open about three hours before international flights and close 60 minutes before departure for those needing assistance or traveling with special needs. Singapore Airlines also provides an Auto Check-In service that automatically checks in eligible passengers 48 hours before the flight and sends boarding passes by email. Passengers should arrive early to allow enough time for check-in, security, and boarding. For help, passengers can contact Singapore Airlines at +1-866-551-1186.