Many travelers ask, "Is it safe to upload passport to United Airlines?" The answer is yes—United Airlines uses secure systems and encryption to protect your personal information when you upload documents through their official website or mobile app. This process is especially helpful for international flights, as it allows the airline to verify your travel documents ahead of time and helps speed up check-in. Just be sure you're on a secure internet connection and using United’s official platforms, not any third-party sites or suspicious links. If you're still unsure or uncomfortable, you can always bring your passport to the airport and have it checked in person.