Negatives:

2. Depending on the specifics perhaps, poor connections if DEN isn't where you're either starting or ending the journey.

I was looking at Frontier for LAX-MCO, and it takes it an awful long time to get me there compared to several other airlines. (Specifically, it couldn't get me there early enough for me to drive to my relatives' Space Coast home while they were still up. Which meant I would have to add a hotel stay to every Frontier trip to there, negating any money savings, plus wasting me tons of time.)

I looked at some other non-DEN destinations from LAX and got similar results. But since I'm only staring my journey's from SoCal, I don't know if LAX is the exception or the rule on this.

(Southwest doesn't have this problem because it can cannot you through dozens of cities. To me, based in LAX, Frontier having to connect me through DEN and absolutely nowhere else is a big downside. Nothing that I have against DEN, it's just that if they can't have enough frequency to DEN and no frequency to anywhere else that makes up for it, that's why they can't connect me nearly as well as Southwest can to most destinations they share.)

Anyone know what percentage of Frontier's traffic is nonstop (and therefore either to or from DEN)?