It takes three days to deliver mail. One day at your local post office, then it is shipped over night to Main Distribution, there it goes by zip codes, checks stamp, weighed,etc. Then it gets shipped to its destination. There its sits at the post office and is given to your carrier on the next day delivery. San Antonio might have a Major Hub. check your post office. Then it will take, one day, possibly that same day. Depending on Delivery Truck schedule.
Google Maps estimates the driving time as 55 minutes.
That would depend on the chosen route. It can be as short as 203 miles when driving via San Marcos and I-35 and as long as 220 miles via the faster Texas Route 36 and I-10.
First Class Mail is delivered in three to five days.
43 minutes
First class mail is delivered in 3 to 5 days
First class mail is delivered in 3 to 5 days
how long would it take to drive from san antonio, Texas to Boston, Massachusetts
2-4 hours
It is 277.70 miles according to MapQuest.
4 hours
53 minutes, time varies according to traffic.
I don't understand what "at" is.