Yes, you can play downloaded content while in airplane mode, provided you have downloaded the files to your device's internal storage before the flight. Major streaming services like Amazon Prime Video, Netflix, Disney+, and Spotify all offer "offline" features that allow you to save movies, TV shows, and music for playback without an active Wi-Fi or data connection. Once your device is in airplane mode, you simply open the app and navigate to your "Downloads" or "Library" folder to access your saved content. This is a standard way to pass time during a flight without relying on potentially unreliable or expensive in-flight Wi-Fi. It is important to check that your downloads haven't expired—as some apps have a 48-hour viewing window once a playback has started—and to ensure you have enough battery life or a portable charger to power your device through the duration of the media playback.