To stay informed about John Mayer's upcoming concerts and ticket availability, I suggest you visit his official website, follow his social media channels, or subscribe to his email list. You can also check reputable ticketing platforms such as Ticketmaster or Live Nation for updates on ticket sales.
When tickets become available, they are typically released in batches or phases, with pre-sale opportunities for select groups such as fan club members or credit card holders. General public sales usually follow after pre-sales.
It's important to note that ticket availability and pricing can change dynamically based on factors like demand, venue capacity, and seating arrangements. Therefore, it's advisable to check the official sources or ticketing platforms for the most up-to-date information.