Someone had a similar question at beginning of the year, and my recommendation is if your wanting to avoid cab fare is either try to be drop off or try parking at the airport. The long term lots run $4 daily and daily lots $6 daily. You can check status of lot to see which one is open here. Parking Status
Then take CATs bus #5 'The Sprinter' to the transportation center it runs about every 20 minutes. Bus fare cost $1.75 boarding at Terminal.