Mail Delivery Time from Colorado to Washington State

Delivery times for mail sent from Colorado to Washington State vary by service:

• First-Class Mail: 2–5 business days
• Priority Mail: 1–3 business days
• Priority Mail Express: Next business day (guaranteed)

Actual delivery depends on specific origin/destination ZIP codes, weather, and volume. For the most accurate estimate, use the USPS price calculator or consult your shipping carrier.