How long does a letter take to arrive with USPS?

When should a letter mailed today arrive?

USPS counts from day zero: the day the letter is accepted before that location’s cutoff, such as the last posted pickup time on a collection box. Day 1 is the next day. Saturdays count, and a Sunday or postal holiday later in the count is also a transit day. The exception is the day right after mailing: for a letter mailed on a Saturday or the day before a postal holiday, that Sunday or holiday is not counted.

The examples below apply that rule to 2026 dates. Each shows the expected day for the standard listed, not a guaranteed delivery date.

USPS’s Transit Time Map gives the two 3-day examples in the middle rows: mail sent on a Friday is expected Monday, and mail sent on a Saturday is expected Wednesday because the Sunday isn’t included. The USPS FAQ describes the overall First-Class Mail range more loosely, as 1–5 business days not including Sundays and postal holidays.

USPS’s published examples don’t cover a count that ends on a Sunday or postal holiday, when regular mail isn’t delivered, or a Saturday mailing before a Monday holiday. For those dates, treat the estimate as approximate and check the Transit Time Map for your origin ZIP Code.

• USPS Transit Time Map: Sundays and holidays examples
• See every 2026 USPS holiday and weekend delivery rule

Current USPS service standards

Ordinary First-Class Mail does not include tracking. Priority Mail and Priority Mail Express include tracking, and Certified Mail adds tracking information to an eligible First-Class Mail letter.

USPS ranges as published on usps.com and the USPS FAQ when this guide was updated. Weather, network changes, and holiday volume can affect an individual letter, so treat the First-Class Mail and Priority Mail ranges as estimates.

How long does local mail take?

Local mail, a stamped letter to an address served by the same regional processing center, has a 2-day standard, or 3 days when the facility that dispatches mail for the origin ZIP Code is more than 50 miles’ drive from that center.

Since July 1, 2025, USPS calculates the First-Class Mail standard for each pair of 5-digit ZIP Codes in the contiguous 48 states. It adds days for the drive time between regional processing centers, plus one day when the local facility that dispatches mail from the origin ZIP Code is more than 50 miles’ drive from its regional processing center. The rows below are the federal rule’s standards for a single-piece (individually stamped or metered) letter, with limited operational exceptions.

You do not need to know the drive times. The USPS Transit Time Map applies these rules to your origin ZIP Code, and USPS’s ZIP-to-ZIP lookup on usps.com shows expected delivery dates for a specific mailing date.

Estimate the arrival date

1. Identify the service.

   Use the name on the receipt or mailing label. Extra services such as Certified Mail add records to an eligible mailpiece; they do not replace its underlying mail class.

2. Find the real mailing date.

   USPS counts from the day the mail is accepted before that location’s cutoff. A letter dropped in a collection box after the last posted pickup is collected on the next pickup, so start from that day.

3. Use the ZIP Code where the mail enters USPS.

   The standard depends on the 5-digit ZIP Code where the letter enters the mailstream and the delivery ZIP Code. A print-and-mail service enters mail at its own mailing location, which may not be your ZIP Code.

4. Check the origin ZIP on USPS’s Transit Time Map.

   Select First-Class Mail Letters and Flats, enter the mailing-from ZIP Code, and find the destination area. The map shows a service standard, not a guaranteed delivery date.

5. Add Sundays and holidays correctly.

   Count every day after the mailing day, including Saturdays. Skip only a Sunday that comes right after a Saturday mailing, or a postal holiday that comes right after a mailing the day before it. The mailing-day examples above show both cases.

6. Check for service disruptions.

   Review USPS service alerts for weather, natural disasters, or other disruptions that may affect the route.

• USPS Transit Time Map: compare ZIP Code service standards
• IRIS delivery times: preparation and postal handoff

Do weekends and postal holidays count?

Saturdays count. USPS delivers regular mail Monday through Saturday, and according to USPS, Priority Mail Express items and Amazon parcels are the only mail it delivers on Sunday.

Sundays and holidays are not always skipped. In its 2025 final rule on service standards, USPS explained that it excludes Sundays and holidays as transit days for mail entered on a Saturday or the day before a holiday. A Sunday or holiday later in the count still counts, which is why a 3-day letter mailed on a Friday is expected Monday, while the same letter mailed on Saturday is expected Wednesday.

USPS observes 11 postal holidays a year, including Columbus Day and Veterans Day, when many other businesses stay open. The final four 2026 postal holidays are Columbus Day (October 12), Veterans Day (November 11), Thanksgiving (November 26), and Christmas (December 25). Check the USPS holiday list before counting days around a long weekend.

• See every 2026 USPS holiday and weekend delivery rule
• USPS holiday mailing deadlines for 2026

When does the delivery estimate start?

The USPS standard begins when USPS accepts the mailpiece before the day’s cutoff, not when you finish writing, pay, or upload a document. A letter placed in a collection box starts with the next posted collection; a letter handed to a retail associate starts at acceptance.

Printing and preparation happen before handoff, so they sit outside the standard. If you order an online printing and mailing service, the total time from order to delivery includes production and transfer to USPS before the USPS range begins. IRIS is an independent service, not USPS, and does not guarantee when a letter arrives.

How long do postcards and large envelopes take?

A First-Class Mail postcard has the same 1–5 business day range as a letter, and the same collection time, Saturday, Sunday, and holiday rules apply. A standard postcard is not given a faster standard than a letter.

A large envelope (flat) up to 13 ounces also travels as First-Class Mail and uses the same range; USPS’s Transit Time Map covers letters and flats together. A large envelope that is rigid, not rectangular, unevenly thick, or over the size limits is charged and shipped as a USPS Ground Advantage package, which USPS lists at 2–5 days.

How long does Certified Mail take?

Certified Mail does not make a letter travel faster. It is an extra service added to First-Class Mail or Priority Mail, so a Certified First-Class letter has the same 1–5 business day range as an ordinary letter.

What Certified Mail adds is a record: a mailing receipt and tracking information that can show delivery or a delivery attempt. A Return Receipt is a separate option that provides an electronic or hardcopy record with the recipient’s signature.

What to do when a letter is late

A First-Class Mail letter is not late until the 1–5 business day range has passed, and ordinary letters have no tracking number to look up.

1. Wait past the standard and check the address.

   Confirm the mailing date and check the address for a missing apartment number, directional, or ZIP Code error. Ask the recipient to check a shared or cluster mailbox.

2. After 5 days, report the delay.

   USPS says that if a First-Class Mail item has not arrived 5 days after its mailing date, you can document the problem by emailing USPS. A recipient can also take a late-arriving envelope to the local Post Office, since marks on it can show the cause of a delay.

3. After 7 days, start a Missing Mail search.

   USPS accepts Missing Mail search requests starting 7 days after mailing. Have the sender and recipient addresses, the envelope size and type, the mailing date, any tracking number, and a description of the contents ready.

4. Protect a deadline with a replacement.

   If the letter matters and a deadline is close, send a replacement instead of waiting for a search result. Certified Mail gives the new mailpiece a mailing and delivery record.

5. Request a refund only where a guarantee applies.

   First-Class Mail and Priority Mail have no money-back guarantee. For Priority Mail Express that misses its guaranteed date or time, USPS accepts refund requests within 30 days of the mailing date.

• USPS Missing Mail search
• USPS service alerts
• Why USPS returns a letter to the sender
• USPS lost mail: Missing Mail search and claims

Mail to other countries

This guide covers mail delivered within the United States and its territories. International letter delivery depends on USPS international services and the destination country’s postal system, and IRIS mails to U.S. addresses only.