The problems of transporting patients on normal flights are examined. The first section describes the conditions of the plan's microclimate which might affect the health of passengers conditions which are obsolute contraindications for flying are also listed. More detailed analysis is applied to problems regarding the air transport of pregnant women, immature children and heart cases. The effect of hyperventilation and the anxiety state on flight passengers is then studied. To conclude, statistics on patients transported on airline flights and on the influence of flying on the course of diseases are reported.