1930's Mercer County Airport, Sky Haven Airport: Hortman Brothers
1940's Sky Haven Airport, Morrisville Airport: Aero-dusting/Hortman Aviation
1950's Morrisville Airport: Aero-dusting/Hortman Aviation
1960's Morrisville Airport, 3M Airport, Pennridge Airport: Hortman Aviation
1970's 3M Airport: Hortman Aviation
1980's 3M Airport, Doylestown Airport, Northeast Philadelphia Airport: Hortman/Hortmont Aviation
1990's Northeast Philadelphia Airport: Hortman/Hortmont Aviation
2000's Northeast Philadelphia Airport: Hortman/Hortmont Aviation
2010's Northeast Philadelphia Airport: Hortman/Hortmont Aviation
2020's Northeast Philadelphia Airport: Hortman/Hortmont Aviation