What's most interesting about WN's PHL to Florida service is how expensive it's become. It may not seem that way to those who live in other parts of the country, but for many, many years it's been a God-given right to fly from the Northeast/Mid-Atlantic to Florida for cheap. How cheap? Well, there's almost always been fares under $100, and we've seen WN charge as little as $59 at times.

Now, the cheapest PHL fare to, say, FLL is $135. That's not a ridiculous price, but folks who fly these markets for leisure are used to bopping down for the weekend and such all the time. $270 roundtrip discourages you from taking a weekend trip. And if you're taking your kids down to see grandma, you're definitely not going for the weekend at this price.

WN's higher fares definitely give Frontier an opening for the ultra-low fare market. Of course, Spirit already does this a bit from BWI. But is this a profitable business? I wouldn't really think so, but if you can get enough baggage fees off the customers who think they're getting a deal, maybe you can make a go of it.