Red Letenja is an unofficial travel and navigation application for Belgrade Nikola Tesla Airport. The app allows users to keep track of their flight schedules, view maps of the terminals and parking areas, check weather conditions, and access a list of airlines, rent-a-car agencies, taxi services, and bus lines.

One of the unique features of the app is the ability to subscribe to SMS notifications for flight status updates, as well as the option to send SMS messages to taxi services directly from the app. Users can also call airlines and rent-a-car agencies directly from the app.

Red Letenja is a free Android app developed by Miša Peić. While it requires SMS and call permissions for some of its features, the app provides a useful tool for anyone traveling through Belgrade Nikola Tesla Airport.