Frontier can make money, and is from their A319/A320 operations. Unfortunately, Frontier is strapped with a significant amount of dead weight primarily from Chautauqua and former Midwest routes. The success and growth of Southwest over the years while Frontier has struggled, proves the use of regional jets by LCCs is counter productive and a flawed business model.

The use of E190s by LCCs is debatable whether they make economic sense.