Originally Posted by
highflyer75
- FL581 - BOS-DTW in October 1981 in a DC-9-50 - According to wikipedia it would be "Air Tran". However, does not make sense, as Air Tran is fairly new.
That would be Frontier in its first incarnation. (See
The World's Airlines, past, present & future for more.) FL is the current designator for AirTran.