GLOSSARY
Priority Mail Express
By Justin Winter · Updated August 28, 2026
The short answer
USPS’s fastest tier, overnight to most addresses with a money-back delivery guarantee. paperplane does not offer it.
Priority Mail Express is the only USPS product that guarantees a delivery date rather than publishing a service standard. It is priced accordingly and is normally reserved for genuine deadline emergencies.
It is a real service, but not one you can buy here — the fastest option on paperplane is standard Priority Mail, typically 1–3 business days without an overnight guarantee.
See also
- Priority Mail — A faster USPS class — typically 1–3 business days — with tracking included as standard.
- First-Class Mail — The everyday USPS class for letters and documents — typically 3–5 business days, with no tracking unless you add it.
- Service standard — USPS’s published expected delivery time for a mail class — a target measured in business days, not a guaranteed date.
Back to the full mail glossary.