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If you park anywhere other then the airport itself you'll have transportation costs to and from the airport to concider. The best and cheapest thing to do if you are local is to leave the car at home and have a friend drive you. Parking at the airport can be expensive. In the covered lot just four days is about $80. There is also an economy lot right at the airport, but its going to be sitting in the sun.

The best place is the discount parking lot.