Priority Mail Express Delivery Time Calculator (USPS)
The fastest USPS service: 1-3 days, with a money-back guarantee if USPS misses the delivery commitment (exceptions apply).
By Hamdi Saidani.
Delivery Time (USPS Standard)
1-3 days
Days, with a money-back guarantee (exceptions apply)
Priority Mail Express Delivery Calculator
Enter your ZIP codes to calculate Priority Mail Express delivery time.
Today
Already mailed? Pick the day you mailed it.
No regular USPS delivery on these days
All USPS holidaysReady to Calculate
Enter the two ZIP codes and the mailing date above, then press "Calculate Delivery Time" to see the expected delivery date for each mail class.
Latest Day to Send Priority Mail Express
Know when it has to arrive? Enter the date and get the latest drop-off day, counted back from 3 days, the longest of USPS's 1-3 days for Priority Mail Express. USPS shows the exact guaranteed date when you buy the label.
The day it must be delivered.
Priority Mail Express Delivery Times
Priority Mail Express typically delivers in 1-3 days to most domestic destinations. Overnight delivery is available between many ZIP pairs when you mail before your Post Office's acceptance time, which varies by location.
Overnight Delivery
Available between many ZIP pairs when you mail before your Post Office's Priority Mail Express acceptance time. Delivery is by 6 PM on the guaranteed day.
2- or 3-Day Delivery
Elsewhere the guarantee is 2 or 3 days, shown when you buy the label. Since August 1, 2023, USPS does not refund late deliveries to or from Alaska and Hawaii.
Money-Back Guarantee
How the Money-Back Guarantee Works
Priority Mail Express is the only USPS domestic service with a money-back guarantee.
If your package does not arrive by the guaranteed date and time, you can request a refund of the postage (except for items to or from Alaska and Hawaii, since August 1, 2023).
USPS lists other exceptions too, such as delays from events outside its control.
How to request a refund:
- Keep your mailing receipt with the guaranteed delivery date
- Request the refund 2 to 30 days after the mailing date (30 to 60 days if you also bought an extra service)
- Submit online at usps.com or at your local Post Office
- Approved refunds are paid by check for online requests, in cash, check or money order at a Post Office, or back to your card for Click-N-Ship labels
Priority Mail Express Pricing
Retail prices start at $35.65 (up to 0.5 lb, Zone 1) and a Flat Rate Envelope costs $35.90. For mail sent from October 4, 2026 through January 16, 2027, USPS holiday prices apply: $37.05 and $38.25. Prices depend on weight, size and zone.
| Package Type | Retail Price |
|---|---|
| Flat Rate Envelope | $35.90 (holiday $38.25) |
| Padded Flat Rate Envelope | $36.90 (holiday $39.25) |
| Legal Flat Rate Envelope | $36.20 (holiday $38.55) |
| Retail (up to 0.5 lb) | From $35.65 (holiday $37.05) |
| Retail (1 lb) | From $35.90 (holiday $37.30) |
| Retail (5 lbs) | From $37.80 (holiday $40.25) |
Retail prices from July 12, 2026. Holiday prices are for mail sent from October 4, 2026 through January 16, 2027. A "From" price is the Zone 1 price.
Priority Mail Express Pros & Cons
- Fastest USPS service available
- Money-back guarantee on delivery time
- Sunday and holiday delivery in many major markets (extra $12.50)
- Free package pickup from your location
- Up to $100 insurance with most shipments
- Signature record on request
- Most expensive domestic USPS option
- Overnight not available to all ZIP codes
- Cutoff times vary by location
When to Use Priority Mail Express
- Time-sensitive documents and packages
- Legal documents with deadlines
- Urgent business shipments
- Last-minute gift shipping
- Items requiring guaranteed delivery
Priority Mail Express Pro Tips
- 1Ship before your Post Office's Priority Mail Express acceptance time for overnight delivery
- 2Use a Flat Rate Envelope for heavy items: one price up to 70 lb anywhere in the U.S.
- 3Schedule free pickup instead of going to the post office
- 4Keep your receipt for money-back guarantee claims
Frequently Asked Questions
How fast is Priority Mail Express?
Priority Mail Express delivers in 1-3 days with a money-back guarantee.
Overnight delivery is available between many ZIP pairs when you mail before your Post Office's Priority Mail Express acceptance time, which varies by location. It's the fastest domestic USPS service.
Does Priority Mail Express have a guarantee?
Yes, Priority Mail Express is the only USPS domestic service with a money-back guarantee.
If USPS fails to deliver by the guaranteed date/time, you can request a refund of the postage online or at a Post Office, 2 to 30 days after the mailing date (30 to 60 days if you also bought an extra service).
Since August 1, 2023, USPS does not refund late deliveries to or from Alaska and Hawaii.
Does Priority Mail Express deliver on Sunday?
Yes, in many major markets. USPS offers Sunday and holiday delivery for Priority Mail Express for an extra $12.50 (USPS Notice 123, July 12, 2026 prices).
How much does Priority Mail Express cost?
Priority Mail Express starts at $35.65 at a Post Office (up to 0.5 lb, Zone 1); a Flat Rate Envelope costs $35.90.
For mail sent from October 4, 2026 through January 16, 2027, USPS holiday prices apply: $37.05 and $38.25. Retail rates for other packages vary by weight and destination. Commercial pricing is lower.
It includes up to $100 of insurance with most shipments.