Arizona

First, check VaccineSpotter

Updated every minute across several pharmacy chains such as Albertson, CVS, Fry's, Health Mart, Kroger, Safeway, Smith's, The Little Clinic, Walgreens, and Walmart.

Phoenix 25-mile radius

Tuscon 10-mile radius

Statewide search radius

Second, check the State and Local Government Sites

The government and healthcare provider appointment booking sites are updated regularly. Try to sign up at one; otherwise check back daily.

Sign up - State-run Mass Vaccination Locations

View - Maricopa County Vaccine Provider List

View - Pima County Vaccine Provider List

Third, use Twitter

If no appointments are available, follow these Twitter accounts. They tweet out appointments as they come available.

@azvaccinebot (CVS - Statewide)

Finally, Stay in the Game

Periodically refresh the websites. Some providers update at midnight or only certain days of the week. Check in the morning or when there's bad weather (people cancel every day).