Frontier is great for cheap flights. However, I have found that it is routine during over night flights that the stewardesses DO NOT SHUT UP THE ENTIRE NIGHT. I had contacted customer care about this problem before, and it appears that nothing was done about it. The stewardesses do not have any consideration for their sleeping passengers. They are stay in their nooks and chitchat away about their lives and boyfriends and their voices carry throughout the entire plane.
I highly suggest Frontier for their day flights.
Night Flight? Pay more and go with an airline that respects their customers.