How long does USPS take to deliver?

USPS delivery times vary by service: Priority Mail Express delivers in 1-3 days with a money-back guarantee (exceptions apply), Priority Mail in 2-3 days, Ground Advantage in 2-5 days, and a stamped First-Class letter in 2-5 days. The exact number of days depends on your two ZIP codes: USPS sets a standard for each pair of ZIP areas. Ground Advantage packages of 1 lb or more to or from Alaska, Hawaii and U.S. territories can take longer.

How accurate is this USPS delivery time calculator?

Dates for Priority Mail, Ground Advantage, First-Class Mail, Media Mail and Marketing Mail come from the USPS Service Standards Directory of October 1, 2026 for your ZIP pair, including the 5-digit exceptions. Priority Mail Express is shown as the 1-3 day range USPS publishes. We compare our results with USPS's own Service Commitments tool. A standard is USPS's target, not a guarantee: only Priority Mail Express has a money-back guarantee, and exceptions apply.

What is USPS Ground Advantage?

USPS Ground Advantage is a shipping service that replaced USPS Retail Ground, Parcel Select Ground, and First-Class Package Service. USPS says it delivers in 2-5 days in the lower 48 (to or from Alaska, Hawaii and U.S. territories it takes much longer), for packages up to 70 lbs, with tracking and up to $100 of insurance included.

How do I choose the right USPS service?

Choose based on speed and budget: Priority Mail Express for urgent items (money-back guarantee, exceptions apply); Priority Mail for 2-3 day shipping; Ground Advantage for affordable shipping with tracking; First-Class Mail for lightweight letters and cards. Use our calculator to compare all options for your specific route.

Does USPS deliver on Saturdays and Sundays?

USPS delivers packages on Saturdays as part of regular service. Priority Mail Express can be delivered on Sundays and holidays in many major markets for an extra $12.50. Regular mail (letters) is delivered Monday through Saturday, but not on Sundays.

What affects USPS delivery time?

Several factors affect delivery time: the distance between the two ZIP areas (USPS sets the days per pair of 3-digit ZIP areas), mail class selected, weather conditions, holidays, and processing facility capacity. Remote or rural areas may experience longer delivery times than urban areas.

Delivery Time Calculator for USPS Mail

Enter two ZIP codes and the mailing date to see when USPS expects your mail to arrive, for Priority Mail, Ground Advantage, First-Class Mail and more. The dates follow USPS's published service standards.

Independent tool, not affiliated with the United States Postal Service. Days come from the USPS Service Standards Directory dated October 1, 2026 (Priority Mail Express: the 1-3 days USPS publishes).

From ZIP Code

To ZIP Code

Mailing Date

Today

Already mailed? Pick the day you mailed it.

Dropped off after the last pickup that day (it goes out with the next day's mail)

Mail Class

No regular USPS delivery on these days

All USPS holidays

Ready to Calculate

Enter the two ZIP codes and the mailing date above, then press "Calculate Delivery Time" to see the expected delivery date for each mail class.

From ZIPTo ZIPResults

Is there mail today? USPS delivers Monday through Saturday, except on USPS holidays. See today's answer.

Free, No Sign-Up

Two ZIP codes and a date

USPS Standards

Published by USPS

Main Mail Classes

Compared side by side

October 2026 Data

USPS directory of October 1, 2026

How to Use Our USPS Delivery Calculator

Three steps. The days come from USPS's published service standards. The zone we show sets the price, not the days.

Enter ZIP Codes and Date

Type the ZIP code you mail from and the ZIP code it goes to. The mailing date is today unless you pick another day, such as the day you already mailed it.

Pick a Mail Class

Choose a specific mail class or compare all classes to find the best option for your needs.

Get Your Estimate

View delivery dates based on USPS service standards and next-step guidance if your package is delayed.

How Does USPS Calculate Delivery Time?

USPS does not use the price zone to set delivery days.

It publishes a standard, in days, for every pair of 3-digit ZIP areas and each main mail class except Priority Mail Express, plus a list of 5-digit ZIP codes that take longer.

Zones are a separate thing: they set the price. Far routes tend to have both a high zone and more days, but the zone does not decide the days.

Zones Set the Price

The zone is the distance band between the two 3-digit ZIP areas. It sets what you pay for Priority Mail and Ground Advantage, not how many days USPS allows.

Zone 1-2: Local (0-150 miles)
Zone 3-4: Regional (150-600 miles)
Zone 5-6: National (600-1,400 miles)
Zone 7-8: Cross-country (1,400+ miles)

Service Standards

Each main mail class has a standard in days for every ZIP-area pair. Priority Mail Express is not in that list: USPS gives it 1-3 days with a money-back guarantee, and exceptions apply.

We count the days the way USPS's own delivery-date tool does: Sundays count, except the Sunday right after a Saturday mailing (mail dropped off the day before a holiday may skip Sundays too), and holidays never count.

Standards are USPS's targets, not guarantees.

Priority Mail Express: 1-3 days, money-back guarantee (exceptions apply)
Priority Mail: 2-3 days
Ground Advantage: 2-5 days in the lower 48 (to or from Alaska, Hawaii and U.S. territories it takes much longer)
First-Class Mail: 2-5 days for a stamped letter

Where Our Numbers Come From

The days for Priority Mail, Ground Advantage, First-Class Mail, Media Mail and USPS Marketing Mail come from the USPS Service Standards Directory dated October 1, 2026, which USPS publishes on its PostalPro site.

We also add the 5-digit exceptions USPS publishes (including the 15 million Priority Mail 5-digit-to-5-digit pairs it lists separately).

Priority Mail Express shows the 1-3 days USPS publishes for it.

For Priority Mail leaving Hawaii or southeast Alaska, or going into southeast Alaska, the date also includes the extra day (or two) USPS's own delivery-date tool adds for some Friday or Saturday mail.

Results carry a "USPS standard" label when the figure comes from USPS. When we have no USPS standard for your ZIP pair and mail class, the result is marked "Estimate" instead.

What Factors Affect USPS Delivery Times?

Things that can change when your mail arrives, and how to plan around them.

Distance

High Impact

Longer routes usually get more days, but USPS sets them per pair of 3-digit ZIP areas, not by zone.

Weather & Natural Events

Variable Impact

Severe weather, hurricanes, wildfires, and natural disasters can delay or halt mail delivery to affected areas for days or weeks.

Peak Seasons

High Impact

USPS publishes recommended last mailing dates before Christmas and asks people to mail early during the holiday season.

Mail Class Selected

High Impact

Each mail class has its own USPS standard, from 1-3 days for Priority Mail Express to 4-7 days for Media Mail in the lower 48. Only Priority Mail Express has a money-back guarantee, and exceptions apply.

Drop-off Time

Medium Impact

Mail dropped off after the last pickup counts as mailed the next day USPS accepts mail, so a Friday drop-off after the last pickup counts from Saturday, not Monday. Tick the after-the-last-pickup box in the calculator to get the right date.

Address Accuracy

Variable Impact

Incorrect, incomplete, or unclear addresses cause delays while USPS attempts to correct or verify delivery information.

Pro Tip: Build in Buffer Time

A USPS standard is a target, not a guarantee, so for anything important, mail a day or two earlier than you need to.

If it must arrive by a set date, Priority Mail Express has a money-back guarantee, but exceptions apply: USPS no longer refunds late Express items to or from Alaska and Hawaii, and a refund does not make a late package arrive sooner.

USPS Service Comparison

Compare USPS delivery days, tracking and included insurance for the main mail classes. Days are USPS standards inside the lower 48 states; Alaska, Hawaii and U.S. territories can take longer.

Service	Delivery Time	Max Weight	Insurance
Express Priority Mail Express	1-3 days	70 lbs	Up to $100 (most shipments)
Priority Priority Mail	2-3 days	70 lbs	Up to $100 included
Ground USPS Ground Advantage	2-5 days	70 lbs	Up to $100 included
First-Class First-Class Mail	2-5 days	3.5 oz (letters), 13 oz (large envelopes)	None
Media Media Mail	4-7 days	70 lbs	None

USPS Shipping Resources

Guides to USPS delivery times, mail classes, deadlines and tracking.

USPS Delivery Times Guide

Delivery times for each USPS mail class, from USPS standards

Calculator by ZIP Code

The USPS delivery days between any two ZIP codes

Mail Time Between States

How long mail takes from one state to another, with USPS's numbers

Mail Classes Explained

Compare Priority Mail, Ground Advantage, First-Class, and more

Ship-By Date Calculator

The latest day you can mail so it still arrives on time

Holiday Shipping Deadlines

Last days to mail for Thanksgiving, Christmas and New Year

Is There Mail Today?

Today's answer, the next USPS holiday and the full 2026-2027 list

Delivery Times by State

Fastest and slowest states, ranked from USPS's own standards

USPS Tracking Statuses Explained

Understand tracking statuses and what they mean

International Shipping

Delivery times and options for worldwide shipping

USPS Rates Calculator

Calculate shipping costs alongside delivery times

How to Calculate

Step-by-step guide to estimating delivery times

Frequently Asked Questions

Common questions about USPS delivery times and our calculator.