How long does it take a letter to be delivered from one address in New York City to another in Manhattan?

Typically, a letter sent from one address in Manhattan to another within New York City can be delivered within 1 to 2 days, especially if sent via standard mail. For faster options, services like Priority Mail can often deliver the letter the same day or the next day. However, delivery times can vary based on factors such as the time of mailing, the specific locations involved, and current postal service conditions.