Let talk about USPS domestic shipping cost including tracking . You can calculate from Price calculator here.
Domestic USPS Prices & shipping cost
| Letters | Retail |
| First-Class Mail letter (1 oz.) | $0.63 |
| First-Class Mail letter – each additional ounce | $0.24 |
| First-Class Mail Flat/Large Envelope (1 oz.) | $1.26 |
| First-Class Mail Flat/Large Envelope -each additional ounce | $0.24 |
| Postcard | $0.48 |
| Flat Rate Envelopes | Retail |
| Priority Mail Flat Rate Envelope* | $8.95 |
| Priority Mail Legal Flat Rate Envelope* | $9.25 |
| Priority Mail Padded Flat Rate Envelope* | $9.65 |
| Priority Mail Express Flat Rate Envelope* | $26.95 |
| Priority Mail Express Legal Flat Rate Envelope* | $27.10 |
| Priority Mail Express Padded Flat Rate Envelope* | $27.50 |
| Packages* | Retail |
| Media Mail (1 lb.) | from $3.65 |
| Parcel Select Ground®(1 lb.)* | from $8.50 |
| First Class® Package Service (1 oz.)* | from $4.50 |
| Priority Mail (1 lb.)* | from $8.70 |
| Priority Mail Small Flat Rate Box* | $9.45 |
| Priority Mail Medium Flat Rate Box* | $16.10 |
| Priority Mail Large Flat Rate Box* | $21.50 |
| Priority Mail APO/FPO/DPO Large Flat Rate Box* | $20.00 |
| Priority Mail Express (0.5 lb.)* | from $26.95 |
| International Mail & Packages | Retail |
| First Class Mail Intl Letters (1 oz.) | $1.45 |
| First Class Mail Intl Flats- 1 oz.) | from $2.90 |
| First Class Mail Intl Flats- Merchandise (up to 15.994 oz.) | NA |
| CANADA | |
| Prepay Canadian Duties and Taxes | NA |
| First Class Package Intl Service – Canada (1 lb.) | from $22.10 |
| Priority Mail Intl (1 lb.)- Canada | from $40.45 |
| Priority Mail Intl Flat Rate Envelopes – Canada | $29.60 |
| Priority Mail Intl Small Flat Rate Box – Canada | $30.70 |
| Priority Mail Intl Medium Flat Rate Box – Canada | $56.80 |
| Priority Mail Intl Large Flat Rate Box – Canada | $73.80 |
| Priority Mail Express Intl Flat Rate Envelopes – Canada | $47.95 |
| MEXICO | |
| First Class Package Intl Service – Mexico (1 lb.) | from $22.60 |
| OTHER COUNTRIES | |
| First Class Package Intl Service – Other Countries (1 lb.) | from $22.60 |
| Priority Mail Intl (1 lb.)- Other Countries | from $48.80 |
| Priority Mail Intl Flat Rate Envelopes – Other Countries | from $36.85 |
| Priority Mail Intl Small Flat Rate Box – Other Countries | from $38.55 |
| Priority Mail Intl Medium Flat Rate Box – Other Countries | from $82.85 |
| Priority Mail Intl Large Flat Rate Box – Other Countries | from $108.10 |
| Priority Mail Express Intl (0.5 lb.) | from $47.95 |
| Global Express Guaranteed (0.5 lb.) | from $67.80 |
| Special Services | Retail |
| Certified Mail™ | $4.15 |
| Certified Mail™ Restricted Delivery | $10.80 |
| Certificate of Mailing | $1.85 |
| Registered Mail™ | from $15.25 |
| Restricted Delivery | $10.80 |
| Return Receipt -(mail) | $3.35 |
| Return Receipt -(electronic) | $2.10 |
| Signature Confirmation™(First Class Package Service-electronic) | $3.80 |
| Adult Signature – (Basic) | $8.50 |
| Adult Signature – (Person Specific) | $8.75 |
| Package Intercept | $15.95 |
| USPS Services | Price (2022) |
|---|---|
| Global Express Guaranteed (at the Post Office) | $67.80 |
| Global Express Guaranteed(Commercial Base) | $64.41 |
| Global Express Guaranteed(Commercial Plus) | $64.41 |
| Priority Mail Express International(At PO) | $47.95 |
| Priority Mail Express International(Commercial Base) | $44.95 |
| Priority Mail Express International(Commercial Plus) | $44.95 |
| Priority Mail Express International Flat Rate(PO) | $47.95 |
| Priority Mail International (At PO) | $40.45 |
| Priority Mail International (Commercial Base) | $37.47 |
| Priority Mail International (Commercial Plus) | $37.47 |
| First-Class Letters and postcards | $1.40 |
| First-Class Large Envelopes (Flats) | $2.75 |
| First-Class Package | $14.85 |
| Airmail M-Bags | $52.80 |