RFID (Radio Frequency Identification) technology is widely used in science and technology, as well as in people’s daily lives. One of the rapidly growing areas of application of RFID is the use of this technology on UAVs (unmanned aerial vehicles). The key parameters for successful application of RFID on UAVs are the time and probability of successful tag reading. For this purpose, various tag states are studied, as well as the time and probability of transition from one state to another. The paper proposes analytical and simulation models, as well as a comparison of the results obtained by these methods.