usps over night shipping

usps over night shipping is available through USPS Priority Mail Express, offering guaranteed overnight delivery to most domestic destinations. This premium service includes tracking, insurance, and weekend delivery options. It’s ideal for urgent documents, medical items, or high-value products. Rates depend on distance and weight, but Flat Rate envelopes provide predictable pricing. Ensure packages are dropped off before the cutoff time to meet the overnight delivery window and avoid delays.