How much time should be allowed for delivery through the postal system?
First Class letters should be delivered overnight in the metro Denver area and within three days coast-to-coast. Presorted Standard mail has no guaranteed delivery times. However, there are service objectives of three days within the metro Denver area, five days within other parts of Colorado, and three to ten days nationally. Flat-size mailers can take considerably longer in Presorted Standard mail. If an “in-home” date is critical, Presorted First Class would be recommended.
