The work purpose consists in the algorithm development for aircraft target choice. The investigations were carried out with the use of methods of a system analysis, a theory of modeling, mathematical methods, methods of object-directed programming. In farms when agricultural area processing it is advisable to use an aircraft. A choice is argued by aircraft advantages over the ground-based means of agricultural area processing which consist in mobility and a processing speed and also in the absence of mechanical impact upon the growth of the area under processing. In the paper there is offered a procedure for a choice of an aircraft type for processing different agricultural area on the criterion of minimum costs. An investigation novelty consists in the use of the algorithm developed with reference to the choice of agricultural aircraft for chemical agent distribution depending on agricultural area dimensions and a landscape. Conclusion: the developed algorithm for a target choice of an aircraft allows carrying out a complex analysis both of aircrafts (characters, engineering and flight characteristics) on the basis of costs minimum for an agricultural area processing, and a geometry (dimensions and configuration) of the areas to be subjected to processing. In the paper as an example there is carried out a choice of an aircraft for processing a set of areas with specified dimensions.