One business day after the carrier takes the parcel, delivered by a stated hour rather than sometime the next morning. UPS commits its Next Day Air family to overnight delivery outright. USPS publishes Priority Mail Express - the closest thing it sells to overnight - at “1-3 day delivery service by 6 PM with a money-back guarantee,” which is a range, not a flat promise of the next calendar day. Both were read on the carriers' own pages on 2026-08-28.
Every overnight tier below names an hour on the next business day - none of them promise the middle of the night.
Both carriers publish an hour, not just a day. Read from usps.com and ups.com on 2026-08-28.
| Carrier | Service | Published commitment |
|---|---|---|
| USPS | Priority Mail Express | “1–3 day delivery service by 6 PM with a money–back guarantee. You get competitive prices and fast delivery every day, all year, with limited exceptions.” |
| UPS | Next Day Air Early | Reaches the 48 contiguous states and Anchorage, AK, overnight, with Saturday delivery available. |
| UPS | Next Day Air | Reaches all 50 states and Puerto Rico overnight, with Saturday delivery available. |
| UPS | Next Day Air Saver | Reaches from all 50 states to the 48 contiguous states overnight, without the Saturday option carried by the two tiers above. |
Read the USPS row carefully: it says one to three days, not one. Most Priority Mail Express shipments land the next day, but the published product itself leaves room for a second or third day on longer or harder-to-reach routes - which is why "overnight" and "Priority Mail Express" are not perfectly interchangeable words, even on USPS's own page. FedEx runs a further three-tier overnight lineup of its own; our FedEx Priority Overnight guide has the current hour for each one.
A label bought at midnight behaves identically to one bought at nine in the morning - what counts is the moment the carrier actually takes the box. Buy early, ship late, and the delivery date does not move.
A parcel accepted late Friday has no working day between then and Monday, so its "next business day" is Monday, not Saturday, unless the specific tier you bought carries weekend delivery.
Every overnight network runs one nightly sort. A parcel handed over after the local cutoff misses that sort entirely and rides the following night's instead - see our cutoff time guide for how that hour is set location by location.
On a sibling page we quoted an 8 lb boxed board game and puzzle set on a short regional lane and let the calculator return its five best-value services. Neither USPS Priority Mail Express nor a UPS overnight tier made that list; the fastest paid row it surfaced was a plain three-to-four day ground service. That is the practical shape of demand for overnight: it exists for the shipment with a real deadline, and most boxes are not that shipment.
One business day after the carrier takes the parcel, arriving by a stated hour rather than at a random point the next morning. UPS Next Day Air commits to overnight delivery, and USPS Priority Mail Express publishes "1-3 day delivery service by 6 PM with a money-back guarantee" - both read 2026-08-28. The Express product's own range shows overnight is not universal even inside a single service name.
Only counting business days. A parcel handed to the carrier on Friday afternoon does not move over the weekend, so its "next business day" lands on Monday - a Saturday-capable service is the only way around that, and neither UPS Next Day Air Saver nor USPS's routine handling carries one by default.
By whatever hour the specific tier publishes, not first thing in the morning by default. USPS commits Priority Mail Express to 6 PM on the scheduled day. UPS splits its own overnight lineup by hour across three tiers, with only the priciest reaching most businesses before mid-morning.
No. USPS sells one overnight-class product with a published range and a money-back term. UPS sells three separate overnight tiers split by delivery hour and geographic reach. FedEx sells its own three-tier overnight lineup under different names again - see our FedEx Priority Overnight guide for those hours specifically.
Only when a specific hour on a specific day matters to someone. On a light 1 lb parcel we quoted for a companion example - a trading card lot, Newark, NJ to Atlanta, GA - the fastest paid option our calculator returned was UPS 2nd Day Air at $15.38, a 3-4 business day estimate, not a literal overnight service - a reminder that most routine parcels never reach for the overnight tier at all.
Carriers rewrite service pages without notice. What is above is what each network published on the date shown; check the carrier's own page before promising anyone a specific hour.