“In Transit, Arriving Late”: what USPS tracking means

Words in capitals (TIME, DATE, LOCATION and so on) are USPS's placeholders; the real tracking page fills them in.

The sentence gives no new delivery date. The line sits under the status category “On the Way”, which replaced “Moving Through Network” in USPS's 2026 update (Moving Through Network).

USPS uses the same event codes (A2, P2, TL) for three wordings; which one you see depends on how the package is tracking against its expected delivery date (EDD). USPS's own list spells out the switch in its Description column: the on-time wording is shown when “EDD > Today” and the late wording when “EDD < Today”. So “In Transit, Arriving Late” means the expected delivery date has already passed while the package is still moving (USPS PTR2 scan event list, event A2, P2, TL, p. 13, 18, 19).

When does the plain line show instead? USPS's known-issues list explains: “The USPS.com description for the A2 and P2 events is ‘In Transit to Next Facility’ and can include ‘Arriving on Time’ or ‘Arriving Late’ when PTR/PTR2 has a displayable Delivery Date.” (USPS PTR2 known-issues list (v13), section 2.3, "Event Codes A2 and P2") So “In Transit to Next Facility” with no “on time” or “late” means USPS had no delivery date to show, not that the package is late.

Two of the three codes are air transit scans. USPS says the lines help fill gaps: “This event helps to fill a visibility gap for customers using the tracking web site.” Its modernization overview adds “Air Transit Events A2 and P2 are existing events in PTR” (USPS PTR Modernization overview (v14), section 3.2.2, "Updated Requirements for Event Codes A2 and P2") and “New requirements and system upgrades will enable more A2 and P2 events to be sent to PTR2”; the known-issues list spells out the codes: “New requirements on the source system result in PTR2 having more Air Transit events A2 (air arrive) and P2 (air depart) than PTR.”

Only for Priority Mail Express, of the shipping services on USPS's refund page. It covers “Priority Mail Express postage for mail that did not arrive based on the guaranteed service arrival time.” (USPS, Request a Refund, "Priority Mail Express", What Is Eligible), applied for “2 to 30 days after the mailing date for Priority Mail Express without extra services.” USPS's Missing Mail page says the same: “If you used a service with a money-back guarantee such as Priority Mail Express, you may be able to request a refund.” USPS's refund page lists no money-back guarantee for Priority Mail or Ground Advantage postage.

You mail a Ground Advantage package on Monday, Nov 2, 2026 and USPS shows an expected delivery date of Thursday, Nov 5, 2026. On Friday, Nov 6, 2026 the line changes to “In Transit, Arriving Late”.

• USPS has said only that it expects delivery after Nov 5, 2026; it gives no new date.
• If nothing moves, a Missing Mail search can start on Monday, Nov 9, 2026.
• If it was insured and never arrives, the Ground Advantage claim window opens after day 15 (Nov 17, 2026) and closes before day 60 (Jan 1, 2027).
• There is no postage refund for a late Ground Advantage package; had it been Priority Mail Express, the refund window would be 2 to 30 days after mailing.

Mercari: “For an item to be considered lost in transit, 30 or more days must have passed following the most recent tracking scan as provided by the carrier” (Mercari, Shipping Protection, requirements list).