Mountainside Air covers a wide stretch of the Phoenix, AZ, area, including:
- Anthem
- Avondale
- Black Canyon City
- Buckeye
- Carefree
- Cave Creek
- Desert Hills
- Fountain Hills
- Glendale
- Litchfield Park
- New River
- Peoria
- Phoenix
- Rio Verde
- Scottsdale
- Sun City
- Sun City West
- Surprise
- Wittman