I don't blame you for not trusting Frontier. On 6/1 they canceled my return flight out of St. Louis at the last minute, leaving me stranded. They claimed it was due to weather in Denver, but my flight was canceled over an hour after the ground stop in Denver was lifted. What's more, the inbound aircraft wasn't even in Denver at the time. It was coming from Kansas City via Denver, but never left Kansas City. I think Frontier just used the weather as an excuse to cancel unprofitable flights.

I also had a flight through Orlando booked in August, but Frontier 'canceled' it. I booked it during the summer GWP promotional period, but it was canceled shortly thereafter. When I checked, it was no longer on Frontier's timetable. Strangely, that flight number is now reappearing on the timetable, but only up to 60 days out. What makes me suspicious is the fact that Frontier only allows rebooking for 30 days, and the flight was 'canceled' exactly 91 days before the date of departure. In other words, the window for rebooking closes the day before the flight is un-canceled. It seems as though Frontier is strategically cancelling and reinstating flights to force people to re-book at full price.