The average aide salary at Union High was $47,274 , which is 105 percent higher than the average salary for this job in Missouri, and 46 percent higher than the national average for this job . Aide salaries at Union High typically range from $38,700 to $51,944 (25th to 75th percentile). The highest reported aide salary was $103,000. There are 19 employees at Union High with the job title aide.