When preparing for a journey with LATAM Airlines, one of the most important things to know is how early you can check in before your flight. LATAM provides flexible and convenient check-in options for both domestic and international travelers. You can begin checking in 48 hours prior to your scheduled departure time for most flights. This early check-in window applies whether you're flying within South America or to an international destination. For domestic flights, check-in closes 60 minutes before departure, while for international flights, it closes 90 minutes prior to takeoff. This advance check-in opportunity gives travelers the chance to confirm seat selections, add baggage, and receive their boarding passes well before arriving at the airport. LATAM encourages passengers to check in through their website or mobile app, which is user-friendly and efficient. This not only saves time at the airport but also helps avoid long lines and delays. For travelers who prefer checking in at the airport, LATAM's airport check-in counters generally open about 3 hours before the flight and close 1 hour prior to departure, so arriving early is strongly advised, especially during peak hours. The simple difference between checking in online versus at the airport is about time and convenience. Online check-in is faster and can be completed from the comfort of your home or hotel, while airport check-in may require waiting in lines, particularly for international flights or if additional documentation is needed. If you're traveling with checked baggage, it's still necessary to arrive early enough to drop off your bags, even if you’ve already checked in online. Baggage drop-off generally closes at the same time as airport check-in: 60 minutes before domestic flights and 90 minutes before international flights. Keep in mind, if you arrive late, LATAM may deny boarding, even if you’ve already completed online check-in. Travelers with special needs, unaccompanied minors, or those traveling with pets are encouraged to check in at the airport and should allow extra time. In some locations, government regulations may affect check-in requirements, so checking specific airport policies is always wise. If you're unsure when to check in or need help with the process, LATAM customer support is available at +1-866-551-1186. The support team can assist with mobile or online check-in, flight changes, seating issues, or baggage questions. For international travelers, it's also crucial to ensure your passport and travel documents are ready, as these may be verified during check-in. In summary, you can check in for your LATAM flight starting 48 hours before departure, and the cutoff is 60 to 90 minutes before takeoff, depending on your destination. Whether you prefer digital convenience or in-person assistance, LATAM offers reliable options to fit your travel needs. Being informed and checking in early will help ensure a smooth, stress-free start to your journey. And if you ever have questions or need quick help, don’t hesitate to contact LATAM at +1-866-551-1186 for timely assistance from a live representative.