how much is it to mail a letter overnight

how much is it to mail a letter overnight depends on the carrier and delivery destination. USPS Priority Mail Express starts at around $28 for domestic overnight service, while FedEx and UPS may charge more depending on delivery zones and time commitments. Weight and size also affect pricing. For exact rates, online calculators are available. Businesses often factor in overnight letter costs when sending contracts, checks, or critical documents that require next-day delivery.