The average aide salary at Belair Elem. was $31,408 , which is 36 percent higher than the average salary for this job in Missouri, but 3 percent lower than the national average for this job . Aide salaries at Belair Elem. typically range from $18,901 to $39,822 (25th to 75th percentile). The highest reported aide salary was $39,822. There are 3 employees at Belair Elem. with the job title aide.