Letters purchased before 5pm Eastern time go out the same day. If your order came in after that cutoff, it processes and ships the following business day.
If your letter is showing as pending and you are past that window, it is worth logging into your account to check the status or reaching out to InmateAid's support team directly. Pending status that lingers beyond the expected processing window is something they can look into and resolve quickly.
Once the letter leaves InmateAid's facility, standard mail delivery to the inmate typically takes about 6 to 7 days depending on the facility's mailroom processing time. Some facilities move faster, others run a little slower, but that is the reliable window to plan around.