Singapore Airlines offers multiple check-in options to accommodate passengers' preferences and schedules. Online and mobile check-in is available between 48 hours and 1.5 hours before your flight's scheduled departure. This allows you to check in from anywhere and receive a digital boarding pass on your mobile device. If you have checked luggage, you can drop it off at the airport's designated baggage drop area after completing online check-in. For those who prefer to check in at the airport, Singapore Airlines recommends arriving at least 2.5 hours before departure if you have checked baggage, and 1.5 hours if you do not. This ensures sufficient time for check-in, security screening, and any other necessary procedures. Please note that check-in counters typically close 40 minutes before departure, so it's important to complete all check-in procedures before then. Additionally, self-service kiosks are available at many airports, allowing you to check in and print your boarding pass up to 24 hours before departure. However, the availability of these kiosks may vary by airport, so it's advisable to check in advance. Regardless of the check-in method you choose, it's essential to have all required travel documents ready and to arrive at the airport with ample time before your flight to ensure a smooth travel experience