We have a wedding in Cancun in May and I am looking at tickets on kayak. Frontier is far and away the least expensive, but I have only flown Frontier once, and it wasn't my best experience as we showed up an hour and half before the flight, and they told us we could get on the plane but our bags couldn't. Ended up driving from Dallas to Aspen that day instead. Anyway, reading online that the issue with Frontier is they are notoriously late, and they usually only have one or two flights going to and from a destination a day. Since this is a wedding and we are paying for an expensive resort, the idea of being delayed a day isn't a great one, but I also don't relish the idea of paying an extra $600+ to fly American. So give me honest opinions and reviews on Frontier. Is it as bad as it seems?