It's almost always more expensive renting a car from the airport versus picking it up in town. Just go to town.
This post originally appeared on Map Happy.
My fianc and I were in Denver during Martin Luther King weekend and, unfortunately, walking is just not an option in Colorado. I also had a suspicion that the car rental agencies at the airport would also try to gouge us, from the extra convenience, demand and the fact airport taxes can also be levied on travelers. It was time to see if this was true.