what’s the cutoff time for overnight shipping The cutoff time for overnight shipping depends on the carrier and location. For USPS, the cutoff for Priority Mail Express, their overnight service, is typically 5 PM at post offices, though some locations may have later hours. For UPS and FedEx, the cutoff times for next-day delivery services vary based on the specific service level and the drop-off location. It’s important to check with the carrier or your local office to confirm the exact cutoff time.