Typically, if they don't meet a guaranteed delivery date, they'll give you a month extension of Prime to make up for it. If you make a few same-day orders durin

Typically, if they don't meet a guaranteed delivery date, they'll give you a month extension of Prime to make up for it. If you make a few same-day orders during the busy holiday period, you can usually get enough misses to buy you another 6 months or so at least. As for OnTrac, they usually call me if they can't find me. Have you tried calling their support? Usually they're pretty helpful. The very few times they haven't delivered, the day they were meant to, I've called their helpline and they delivered a second time at ~9PM that same day (while I'm home).