The time it takes for clothes to air dry depends on whether you're drying the clothes outside or inside.
When you dry the clothes outside they get more air so they tend to dry faster when drying the clothes outside and when drying clothes outside they usually dry within 1 to 2 hours but sometimes sooner if you get some hot sun and some wind.
Inside they typically take around 2 to 3 hours for the clothes to fully air dry.
If you dry the clothes in the dryer then they usually dry within 40 to 45 minutes on the high heat setting but when air drying clothes inside or outside they take a little longer.