The USPS Priority Mail Delivery Map takes a 3 or 5 digit origin ZIP and paints the country into expected 1, 2 and 3 day areas, with a line above it stating that exceptions apply and delivery time is not promised. It covers Priority Mail only, so the service most small parcels actually travel on never appears.
The map bands a whole country from one origin. A quote answers for two ZIP codes on one morning.
The Priority Mail Delivery Map is a shading tool, not a lookup. It takes an origin and paints the country in bands, and USPS is careful about what it claims for the result.
That last point is the one that trips people up. Most parcels leaving a small business go Ground Advantage, and the map has nothing to say about them, which is why a shaded two-day band and a real quote so often disagree.
Instead of shading a map, we quoted one. The identical 12 by 10 by 6 in box at 5 lb left Newark, NJ 07102 for eight cities on the same morning, and here is every USPS row that came back. Amounts shown are final at checkout with our margin folded in.
| Destination | USPS service | Price | Window on the rate | Estimated date |
|---|---|---|---|---|
| Hoboken, NJ 07030 | No USPS row among the five returned | Not applicable | Not applicable | Not applicable |
| Philadelphia, PA 19102 | No USPS row among the five returned | Not applicable | Not applicable | Not applicable |
| Atlanta, GA 30303 | Ground Advantage | $14.02 | 8-9 business days | August 6 |
| Chicago, IL 60601 | Ground Advantage | $14.02 | 8-9 business days | August 6 |
| Dallas, TX 75201 | Ground Advantage | $16.00 | 6-7 business days | August 3 |
| Denver, CO 80202 | Ground Advantage | $16.97 | 7-8 business days | August 3 |
| Los Angeles, CA 90011 | Ground Advantage | $19.64 | 5-6 business days | August 3 |
| Seattle, WA 98101 | Ground Advantage | $19.64 | 8-9 business days | August 3 |
A shaded map would have this getting steadily slower as the distance grows. The quotes disagree: Los Angeles came back quicker than Atlanta on the same box and the same morning, while Seattle and Chicago shared a window despite two thousand miles between them. Prices climbed with distance in an orderly way, from $14.02 to $19.64, and the two nearest cities returned no USPS row at all among the five rates.
Shading tells you what the network aims for from a whole origin region. A quote tells you what the carrier is willing to estimate for two specific ZIP codes today. Use the map to plan a warehouse location and the quote to plan a parcel.
Distance drove the money predictably across our eight lanes and left the day counts scattered. That is worth remembering before assuming the cheaper lane is the faster one.
The map is built around where you ship from, and so is the rate. Sellers with a choice of pickup points can move a lane a full band by handing the parcel over somewhere else.
It is a tool on usps.com that takes the 3 or 5 digit ZIP code you are shipping from and displays expected 1, 2 or 3 day delivery areas for Priority Mail shipments. USPS prints a line above the map stating that exceptions apply and delivery time is not promised.
No. The map is built for Priority Mail only, so the tier most small parcels travel on is absent from it. For a Ground Advantage estimate you need a rate quote on your actual origin and destination.
They can differ sharply. Our 2026-07-28 quotes for one 12 by 10 by 6 in box at 5 lb leaving Newark returned 5-6 business days to Los Angeles but 8-9 to Atlanta and Chicago, which is the opposite of what a distance-shaded map would suggest.
Each quote returns five rates, and on the two nearest lanes, Newark to Hoboken and Newark to Philadelphia, no USPS row made that list. Rather than fill the gap with a number, we mark those cells as not applicable.