Well, that '$20' fare is really in excess of $40 once the PFC, security fee, and other taxes are added on to the '$20' fare.

But more to the point, I cannot believe that you think that Frontier or Spirit or any other carrier can make money by charging $20 for a ticket. All one needs to do is check the carrier's CASM and divide $20 by the CASM. That is the number of miles that a carrier could theoretically fly a passenger for $20 with a 100% load and break even.

Those are loss leader fares, designed to generate interest. They're no different than the Chevy dealer who lists a brand new Corvette for sale for $20,000.

The fact that you don't recognize those fares as loss leaders but actually think that those airlines make money at those fares tells me that you're susceptible to every huckster that you come in contact with.

But on a serious note, I know this Nigerian prince that has a massive fortune but needs to transfer the money out of the country quickly. He needs an ordinary bank account to transfer it to. In return, he'll give you 10% of the money he transfers. He needs your name, social security number, address, and bank account number to complete the transaction. I've agreed to be a go between. You can PM me all of the details. You will be richly rewarded.