How long does mail take from Illinois?

How long does mail take from Illinois to each state?

The map shades each state by the number of days USPS most often gives a First Class letter from Illinois, and the table under it gives the usual range for every state, so you can read off a trip like Illinois to Oregon at a glance.

How long does a letter take within Illinois?

USPS's directory gives 2 days to 57 percent of the letters that start and end in Illinois, 3 days to 34 percent and 4 days to 8 percent. About 14 percent of the people in Illinois live in ZIP codes whose letters get a day more than the rest of their 3 digit ZIP area, which is the 2025 rule for post offices more than 50 miles' drive from the plant that sorts their mail. If you mail from one of those towns, expect the slower end of each range on this page.

Which states get mail from Illinois fastest?

USPS most often gives 3 days or fewer to letters from Illinois bound for 33 other states, led by Indiana, Wisconsin, Michigan and Missouri. To Indiana, 87 percent of letters have a standard of 3 days or less.

Which states take the longest from Illinois?

USPS gives 5 days to most letters from Illinois going to 3 states, which are Oregon, Hawaii and Alaska. A letter on one of these trips that goes out with Monday's pickup is due on Saturday, or a day later when a holiday falls in the week.

How much of the country is within 3 days of Illinois?

If you sent one letter from Illinois to every person in the country, Illinois included, USPS would give 47 percent of them a standard of 3 days or less. That ranks Illinois 2nd of the 50 states and DC, and the state in the middle of that list is at 22 percent.

How do I find the exact days for one letter?

Each range on this page covers many ZIP codes, and one letter has a single number. For example, USPS gives a letter from ZIP 60629 in Illinois to ZIP 97229 in Oregon 4 days. Our delivery time tool shows that number for any two ZIP codes and counts it out on the calendar, skipping Sundays and holidays.

How were these days worked out?

The days come from USPS's own service standard directory for First Class Mail, effective October 1, 2026, which we download from USPS's Service Standards Files API. It gives the days from every 3 digit ZIP area to every other, plus the 5 digit ZIP codes whose letters get a different number. For Illinois we took each of its 1,389 populated ZIP codes as a starting point and each 3 digit ZIP area of the destination state as an end point, and weighted every pair by the people who live at both ends, using the Census Bureau's 2023 population counts. "Usually" is the range that covers the middle 8 of every 10 letters, and "most often" is the single most common number.

A service standard is USPS's target for a stamped letter mailed before the day's last pickup, and First Class Mail has no delivery guarantee. Sundays and the 11 federal holidays USPS observes don't count as delivery days.