What is the relationship between changes in air pressure and wind speeds? When a high- and low-pressure air mass is far apart, air moves quickly from low to high pressure. When a high- and low-pressure air mass is far apart, air moves slowly from high to low pressure. When a high- and low-pressure air mass is far apart, air moves quickly from high to low pressure. When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.