The 767 entered service with UPS Airlines in 1987.  The freighter can carry up to 15 containers or pallets on its main deck, for a volume of up to 6,600 cubic feet. It’s two lower holds can carry up to 1,830 cubic feet of bulk cargo. The maximum payload capability is 87,700 pounds.  In July 2015, 79 of these were in service.

In 2013  the wingtip devices called “winglets” on the 767s, which are arrow-shaped surfaces attached to the tip of each wing were added to enhance the overall efficiency of the aircraft, saving fuel by reducing drag while also lowering noise emissions by improving take-off performance. The modifications estimated to save UPS more than six million gallons of fuel each year 

The origin of transporting packages by air for UPS (then United Parcel Service) dates to 1929.  UPS packages were transported as baggage on commercial airline flights.  1980, UPS opened its first major hub, located in Louisville, Kentucky. The location was chosen largely because it is three hours flying distance (by jet) from the majority of the continental United States. In addition, Louisville has relatively mild weather and is at the westernmost point of the Eastern time zone.