2025-08-05 00:00:00 The Sea-Tac app will help you get to your gate calm, cool and collected! Whether you’re looking for the fastest TSA security checkpoint line, the closest dining options to your gate or the fastest transportation to get you to downtown Seattle, the Sea-Tac app can help. Take advantage of Sea-Tac’s free Wi-Fi and download the official Sea-Tac Airport app for terminal maps, flight information and transportation tips.