The objective of the study was to determine the effect of the spray boom height and liquid pressure on airborne drift during spray application. A lift mounted sprayer with a 12 m spray boom and standard flat fan nozzles LU 120-03 (Lechler) was used in the field trials. The treatments were made for all combinations of the boom heights 0.35, 0.5 and 0.75 m, and liquid pressures 0.15, 0.3 and 0.5 MPa. For each treatment the sprayer was driven at the velocity of 6.0 km∙h-1, five times over the distance 60 m. The fluorescent dye BSF was sprayed and collected on the samples attached on 4 m masts. The analysis of BSF deposition on the samplers proved the significant effect of both the boom height and the liquid pressure on the airborne drift. The lowest drift was observed for the pressure of 0.15 MPa regardless the boom height. For these parameters the drift was reduced by 50% compared to the standard situation with the boom height of 0.5 m and the pressure of 0.3 MPa. Raising the boom up to 0.75 m and the pressure to 0.5 MPa resulted in 270% increase of the drift.