NationsAir was a small LCC which flew PIT
in the mid-1990's. I lived in Steubenville, OH
(30 miles west of PIT
Airport) at the time, and I knew a student from Boston who used to fly NationsAir home. They flew 732's with a wavy US flag for tail colors.
JetTrain was another small LCC which flew DC-9-30's from PIT
, and MCO
in the mid-1990's. They had these little plastic business-card timetables, two of which I have in front of me from my timetable file.
(I have a NationsAir brochure but no timetable)
JetTrain DC-9's had a black cheatline, a black nose, and a black tail with a sunburst train logo on it. JetTrain used to have a billboard along I-279 that said "the cheapest ticket to New York," with a picture of a state trooper's head with sunglasses on it.