I agree about PHL-RDU as that was a nice route, but when AA started matching the fare, it was obvious Frontier couldn't compete. And I see now they are dropping RDU-MDT. Interesting just 2 days ago I checked the price for RDU-MDT on September 15th and it was $19. Yesterday I went to book and see that September 15th is no longer available and they are discontinuing that route as of September 5th.