LATAM Airlines offers a variety of check-in options to accommodate travelers' preferences and ensure a smooth journey. Passengers can check in online via the LATAM website or mobile app, starting 48 hours before departure for domestic flights and 72 hours before for international flights. Online check-in closes 1 hour prior to departure for domestic flights and 2 hours for international flights. To check in online, travelers need to enter their reservation code, ticket number, or ConnectMiles number. During online check-in, passengers can select or change seats, add baggage, and obtain a boarding pass, which can be printed or saved to a mobile device. For those traveling with checked luggage, after completing online check-in, passengers can proceed directly to the bag drop area at the airport to check their bags. It's important to note that certain passengers, such as those with special needs, unaccompanied minors, or those traveling with pets, may not be eligible for online check-in and should complete the process at the airport. Additionally, travelers with specific ticket types or those needing extra documentation must check in at the airport counter. LATAM Airlines recommends arriving at the airport at least 2 hours before departure for domestic flights and 3 hours for international flights to allow ample time for check-in, security procedures, and boarding. For assistance, LATAM Airlines customer service can be reached at +1-866-551-1186. This number connects travelers with representatives who can help with booking modifications, special requests, or any issues encountered during check-in. Whether passengers choose to check in online, use the mobile app, or go through airport counters, LATAM Airlines aims to provide a seamless and efficient check-in experience.