Old passport book was expiring in mid-November 2019.

8/6 Application mailed from Arizona to Philadelphia PO Box by first class mail.
8/12 Application received.
8/13 Check cashed.
9/5 Two e-mails received 6 hours apart: “Application approved” and “Passport book and card shipped” to be delivered by Priority mail around 9/11. Only one USPS tracking number was provided, so far the tracking states Label created, not yet in system.

This means about 5 weeks door to door, or mailbox to mailbox.