United Airlines check-in offers travelers several easy and flexible options to prepare for their flights smoothly. You can check in online by visiting the United Airlines website or by using the United mobile app, which works on smartphones and tablets. Online check-in typically opens 24 hours before your flight and closes 60 minutes prior to departure for domestic flights and international flights. When you check in online, you can select your preferred seat, add any checked bags, and get your boarding pass, which you can print or save on your phone for quick access. If you prefer, you can also check in at the airport using self-service kiosks that speed up the process by letting you print your boarding pass and bag tags. United Airlines also has staffed check-in counters where airline employees can help if you have questions or special needs, such as traveling with pets, oversized luggage, or require assistance. For travelers carrying only hand luggage, checking in online and using a mobile boarding pass can save a lot of time, letting you skip the lines and head straight to security. It is recommended to arrive at the airport at least two hours before domestic flights and three hours before international flights to allow sufficient time for check-in, security, and boarding. United Airlines also offers special services for families, travelers with disabilities, or elderly passengers to make the check-in process more comfortable. The United mobile app also provides helpful updates about flight status, gate changes, and delays so you can stay informed on the go. Having your identification and travel documents ready before check-in speeds up the process, whether you do it online or at the airport. Overall, United Airlines check-in is designed to be user-friendly and efficient, helping travelers avoid stress and start their journey relaxed. Early check-in can increase your chances of better seat selection and ensure a smooth boarding experience.