[4] L-100 and LM-100J aircraft can be distinguished from the C-130 and C-130J military versions by the absence of side and forward windows underneath the main windshield.

[2][3] On February 3, 2014, Lockheed Martin formally relaunched the LM-100J program, saying it expects to sell 75 aircraft.

[11] By early March 2022 the four LM-100J aircraft (tail numbers N96MG, N71KM, N67AU and N139RB) then owned by Pallas had begun flying numerous flights, numbering at least 522 by May 16, 2024 between Ramstein AB and secondary military air facilities at Nowe Miasto nad Pilicą (EPNM), Poland; Boboc (LRBO), Romania; Sliač (LZSL), Slovakia; Lielvārde (EVGA), Latvia and Aalborg (EKYT), Denmark.

In early June 2024, Larry Gallogly, Lockheed's director, customer requirements for air mobility and maritime missions said, “We have not seen robust demand for the commercial variant of the [LM-100]J, so we haven't had follow-on customers.”[14] Civilian variants are equivalent to the C-130E model without pylon tanks, side and front windows under the main winshield or military equipment.

[18] Past operators include Delta Air Lines, which owned three L-100 aircraft that were assigned to their cargo division during the late 1960s and early 1970s.

[19][20][21][22] The April 27, 1969 Delta system timetable listed scheduled L-100 cargo flights with service to Atlanta (ATL), Charlotte (CLT), Chicago (ORD), Dallas (served via Love Field, DAL), Los Angeles (LAX), Memphis (MEM), Miami (MIA), New Orleans (MSY), New York City (served via Newark Airport, EWR), Orlando, FL (MCO) and San Francisco (SFO).