Frontier Airlines operates primarily out of Terminal 3 at Phoenix Sky Harbor International Airport for most of its flights, including arrivals and departures

. However, there is an international flight by Frontier that operates out of Terminal 4, but all other Frontier flights continue to use Terminal 3

Summary:

• Main Terminal for Frontier Airlines: Terminal 3
• Exception: Some international Frontier flights operate from Terminal 4
• Terminal 3 Details:
  • Located on the west side of the airport
  • Has check-in counters, baggage claim, security checkpoints, and departure gates
  • Amenities include shops, charging stations, Wi-Fi, and pet relief areas

For all regular Frontier flights at Phoenix Sky Harbor, you should go to Terminal 3.