Frontier Airlines EarlyReturns - on line check in not working

Have flight today at 2:45 and it says the flight is not within 12 hours. First time on Frontier. what gives?

I remember once getting to the airport for a United flight and the kiosk told me that it would only work for flights within a certain number of hours. I think it was four hours, but that might be wrong. In any case, it might just be a case of having to wait until your flight gets a bit closer.

I have tried to use Frontier's on-line check-in 3 times and I have only gotten it to work twice...and that was after I tried a few times within the 12 hour window (I think it only worked within 4 hours of my flight). I heard that Frontier is going to redo the web site sometime this year...hopefully that will fix the problem.