York, NY — Bristol, VA — Chattanooga, TN — New Orleans, LA Peninsula Express Baltimore, MD — Newark, NJ Penn Center Express Chestnut Hill, PA — Philadelphia, PA Suburban Station The Penn Texas New York, NY — St. Louis, MO Renamed. Pennsy Aerotrain New York, NY — Pittsburgh, PA experimental run of lightweight Aerotrain Pennsylvania & Shore Line Day Express Boston, MA — Philadelphia, PA renamed Colonial Express The Pennsylvania Limited New York, NY — Chicago, IL Pennsylvania Special New York, NY — Chicago, IL renamed Broadway Limited The Pennsylvania-Wilkes Barre Express Wilkes-Barre, PA — Sunbury, PA — Lock Haven, PA — Altoona, PA The Pennsylvanian New York, NY — Chicago, IL Philadelphia & Baltimore Express Lock Haven, PA — Philadelphia, PA / Baltimore, MD Philadelphia & Boston Express Philadelphia, PA — Boston, MA Philadelphia & Washington Express Kane, PA — Philadelphia, PA Philadelphia Express Jersey City, NJ — Chicago, IL renamed Eastern Express Philadelphia Express Pittsburgh, PA — Philadelphia, PA renamed Day Express Philadelphia Express Williamsport, PA — Philadelphia, PA Philadelphia Night Express Pittsburgh, PA — Philadelphia, PA renamed The Sea Gull Philadelphia Night Express Pittsburgh, PA — Philadelphia, PA Philadelphia Night Express Harrisburg, PA — Philadelphia, PA renamed Chester Countian Philadelphia Special Pittsburgh, PA — Philadelphia, PA renamed Philadelphia Night Express Philadelphian Pottsville, PA — Philadelphia, PA Philadelphian Harrisburg, PA — Philadelphia, PA Piedmont Limited New York, NY — Atlanta, GA — Montgomery, AL — New Orleans, LA The Pilgrim New York, NY — St. Louis, MO renamed The St. Louisian The Pilgrim Philadelphia, PA — Boston, MA Pittsburgh & Chicago Express Philadelphia, PA — Pittsburgh, PA — Chicago, IL renamed Chicago Express Pittsburgh & Northern Express Philadelphia, PA / Washington, DC — Pittsburgh, PA Pittsburgh Day Express Buffalo, NY — Pittsburgh, PA Pittsburgh Day Express New York, NY — Pittsburgh, PA Pittsburgh Day Express Detroit, MI — Pittsburgh, PA renamed The New Yorker Pittsburgh Day Express New York, NY — Pittsburgh, PA renamed The Metropolitan Pittsburgh Express Philadelphia, PA — Pittsburgh, PA renamed Pittsburgh & Chicago Express Pittsburgh Express St. Louis, MO — Pittsburgh, PA Pittsburgh Express Chicago, IL — Pittsburgh, PA Pittsburgh Limited Pittsburgh, PA — New York, NY split into New York Special and Pittsburgh Special Pittsburgh Night Express Buffalo, NY — Pittsburgh, PA Pittsburgh Night Express Philadelphia, PA — Pittsburgh, PA renamed The Sea Gull Pittsburgh Night Express Chicago, IL — Pittsburgh, PA renamed