One of the ways of improvement of the airplane safety during the flight is the correct usage of the radio-telephony. There are regulations by which it is standardized so deviations and with that, potential accidents and incidents would not occur. A very similar phraseology is used in the world, almost the same, which is comprised of many English phrases. The aim of the similarity is to minimize the differences in communication which results in the readiness of the pilot to specific demands of the air traffic controller. In other words, the pilot can expect when and why exactly this demand is to be asked of him. Other than that, the order of the information inside the phrases is also standardized and it eases the flight for the pilot and the controlling surveillance. During the pilot training a great importance is given to using the proper radio-telephony which includes a right using of the phrases together with the grammatically correctly said sentences in English. The good knowledge of the English language is important so the pilots and the air traffic controlers from different countries with different mother tongues can better understand each other. With every analysis of the mistakes in radio-telephony, the risk making the same mistakes again is becoming smaller and with that a great safety of airplanes in the air traffic is secured.