Frontier Airlines operates at both Terminal A and Terminal D at IAH. The parking rate at Frontier IAH Terminal is the same as the parking rate for the entire airport. The hourly parking rates range from $5.00 for the first hour to $15.00 for 7-24 hours. The daily parking rate is $25.00, the weekly parking rate is $175.00, and the long-term parking rate is $150.00.