According to uShip, the average cost of a long distance shipment of large boxes is about $1.50 per mile. For shipments of more than 6 boxes, you can expect anywhere between $550-$700 or more.Click to see full answer. Also, what is the cheapest way to ship boxes across country? If You Are Shipping Something 2 Lbs Or Heavier With A 5 Day Delivery Window… FedEx Ground or UPS Ground will almost always be cheaper than USPS Priority Mail. At exactly 2 lbs, FedEx/UPS is slightly cheaper. USPS will always be cheaper than FedEx or UPS hands down. Subsequently, question is, how much does it cost to ship boxes on Amtrak? Amtrak Express Shipping Costs You may ship up to 500 pounds per day. If you have more than 500 pounds you may break it up into multiple shipments over multiple days. The first 100 pounds is a flat rate of $67. Additional weight is $0.57 per pound. Considering this, how much does it cost to ship a box? Priority Mail Flat Rate Products Free Supplies8 Shipping Price Padded Flat Rate Envelope $7.75 Commercial Base $8.40 at Post Office & Online Legal Flat Rate Envelope $7.45 Commercial Base $8.05 at Post Office & Online Small Flat Rate Box $7.65 Commercial Base $8.30 at Post Office & Online How can I ship a big box? There are six ways you can ship large boxes across the country: United States Postal Service (USPS) Courier shipping (UPS®, FedEx®) Rent a truck and move yourself. Hire professional movers. Rideshare or peer-to-peer shipping. Consolidated freight.