Purchase ticket at airport counter
I just came off a flight and was walking past the Frontier counter in MCO, and the was half a dozen agents doing nothing. I had an itinerary I was checking out on the APP, so I asked if I could purchase it at the counter thinking I would get it cheaper, it was already about 45 dollars on the APP. The agent was very polite, and he came up with almost the same price that I could buy it for.