When shipping domestically, ground shipping is usually the most cost-effective and flexible method of getting your package to your door. Ground shipments are generally forwarded through freight services such as FedEx and UPS, which route smaller and larger trucks across the country to ship and deliver your products. Ground shipping will typically take more time to arrive than products shipped via overnight or second-day air because freight trucks stop at various distribution centers across the country to drop off and pick up multiple shipments. With ground shipping, time to delivery is purely a function of the location between the sender and the receiver.