In this study, we report an experimental investigation of droplet sliding under the influence of a laminar or turbulent airflow for water and glycerin droplets. The onset of sliding is described thanks to a critical Weber number, based on the mean airflow velocity impacting the droplet, depending upon the contact angle hysteresis and a drag coefficient (that also depends on the Reynolds number). A fairly good agreement is observed with our experiments and various data from the literature. The transitions between the various droplet shapes observed during sliding (oval, corner, and rivulet) are characterized in a phase diagram built on the droplet capillary and Bond numbers.