If you’re a permanent resident of the United States, be sure to bring the appropriate documentation to be able to re-enter the U.S. Check-In Time Requirements. When you’re traveling outside of the U.S., make sure you have all required travel documents. A passport is required for all international travel. Find more information at delta.com. Online check-in is not mandatory for all flights, but it is highly recommended by airlines to ensure a smoother travel experience. Some airlines make online check-in mandatory for certain flights, while others allow passengers to choose between online check-in and airport check-in. 5 days ago · 10. Can I check-in online for a connecting international flight? Yes, you can usually check-in online for connecting international flights, provided they are operated by the same airline or partner airlines. However, it is important to check the specific airline’s policies regarding online check-in for connecting flights. Check-in now for your Air India flight. What are the requirements for using E-Check-In? Online check-in service is currently available only for flights out of India, between 4 and 36 hours prior to flight departure. It is mandatory to print the E-Check-in confirmation slip. E-Check-in applies only to passengers who hold a confirmed reservation. Air Canada on your Mobile. travelling to the U.S. During check-in, you can: There are a few reasons why you would not be able to check in online or using the app. For instance, the following customers need to check in with an airport agent: Check in anytime from 24 hours before departure, online or from your Air Canada mobile app. If you are unable to print out your boarding pass, you can pick up one either at the check-in machine or the check-in desk at the airport. Please observe the check-in times . I have checked in online, but I have forgotten my boarding pass. PpPqp2.