Frontier Airlines departs from George Bush Intercontinental Airport (IAH) in Terminal A. This is the Frontier Airlines IAH Terminal that houses most domestic flights, along with other amenities such as eating places, restrooms, and charging stations. Passengers who will fly with Frontier must get checked in online to reduce time spent on check-in and to arrive at least 2 hours prior to flight in order to have security screening. And since Frontier has been one of the cheapest airlines, expect to pay some baggage fees. For more information on gates and flight status, visit the official website of the IAH airport or Frontier's official site before heading to the airport.