USPS Ground Advantage Zone 5-9. 50 cents increase for Zones 5-9, 0-3 lbs. $1 increase for Zones 5-9, 4-10 lbs. ... You can go here to input ZIP code and see the USPS Zone Chart.

USPS zones are the classifications that the agency uses to define how far a parcel has to travel. Zone 1 is anything within 50 miles, while Zone 9, the highest, is anything over 1,801 miles.