US MAIL TRAFFIC REPORT – JULY 20, 2026
July 20, 2026   Dave Lewis

AVERAGE USPS PERFORMANCE FOR ANOTHER SUMMER WEEK

Service performance for USPS letters and flats was neither exciting nor terrifying. (If poor service performance terrifies you, you should take a week off. Maybe the beach.) FC averages were a bit worse than YTD; Marketing Mail, a touch better. There's really nothing to see here.

Summer is a low-volume period for the Postal Service.

The states with the lowest on-time percentages for flats were:

  • Maine: 37.5% on time (8.52 days)
  • Wyoming: 41.5% on time (7.87 days)
  • Washington, DC: 66.5% on time (5.65 days)
  • Arkansas: 78.9% on time (4.79 days)

Most of the rest hover in the 80–95% range.

The best?

  • Colorado: 97.7% on time (1.96 days)
  • Kansas: 94.6% on time (2.21 days)
  • New Mexico: 95.4% on time (2.25 days)
  • Montana: 94.8% on time (2.28 days)
  • Pennsylvania: 94.3% on time (2.34 days)

These rankings are for all flats — Marketing Mail and First-Class mixed together, with a much larger number of Marketing Mail pieces.



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