Cheapest Carrier in 2020: 2-3 Day Under 1 lb. | ShippingEasy
Priority Mail | USPS
After hours of research, it seems that the USPS Priority Mail Cubic is the cheapest way to send packages to Hawaii from the East Coast at $1.287/lb, right? : r/Hawaii
How to Get Cheaper Shipping Rates with USPS Priority Mail Cubic | Blog - SUBTA
Compare USPS Service Levels
Mail & Shipping Services | USPS
USPS Flat Rate Boxes: Save on Flat Rate Shipping
What You Should Know About 2019 USPS Shipping Rates | XPS