Flight or Gas?

The age old debate is getting murkier. It's no longer a slam dunk that driving is going to be cheaper than flying. The only issue is that the travel deals that are competitive generally have to be set up pretty far in advance. I have a feeling that driving will still end up being the cheaper method in most cases though because flying also incurs the slightly hidden cost of a car rental. It would be nice if gas could get back to a more reasonable level but I somehow doubt that we will ever see the south side of $2 a gallon again.