PSoTD

Sounds good to me.

For fliers, this is a winning plan. When new airlines join the mix, especially discount carriers, fares generally go down. In Philadelphia, for example, a year after Southwest Airlines entered the market in 2004, fares had dropped by 25%. Airlines paying for slots would want to get the most for their money: They might switch to larger jetliners, instead of smaller regional jets, to maximize profit. Fewer planes, carrying more people, could cut delays.