Checking in for a Singapore Airlines flight can be done in different ways depending on your preference. Online check-in is available from 48 hours before departure until 90 minutes before the flight. You can check in using the Singapore Airlines website or mobile app by entering your booking reference or ticket number and your last name. During check-in, you can view your flight details, choose or change your seat, and add any extra services if needed. After completing the check-in process, you can download your boarding pass to your phone, receive it by email, or print it. If you are only traveling with carry-on luggage, you can go directly to the security check at the airport. If you have checked baggage, you will need to visit the bag drop counter at the airport. Airport check-in counters generally open three hours before departure and close 40 minutes before the flight. It is recommended to arrive at the airport at least two and a half hours before departure if you need to check bags. Singapore Airlines also offers self-service kiosks at many airports where you can check in, select seats, print boarding passes, and tag your luggage. These kiosks are useful if you did not check in online. Some airports provide early check-in facilities, allowing you to check in and drop off bags up to 24 hours before your flight. If you need special assistance or are traveling with pets or children, you should check in at the staffed counters. Boarding gates usually close about 20 to 30 minutes before departure, so it is important to arrive at the gate on time. Missing the check-in or boarding deadlines may result in being denied boarding. By following the check-in times and choosing the method that suits you best, you can ensure a smooth and stress-free start to your journey with Singapore Airlines.