What are the estimated travel times from the SeaTac Rental Car Facility to the terminal and through TSA security?

For passengers returning a rental vehicle at the SeaTac Rental Car Facility (located at 3140 S 160th St, SeaTac, WA 98188), the total journey to the departure gate involves three distinct phases. First, after parking and returning the car, you must board a complimentary shuttle bus. The shuttle departs every 5–10 minutes and the ride to the main terminal takes approximately 8–12 minutes, depending on traffic within the facility. Second, upon arrival at the terminal (typically the lower level near baggage claim), you will need to walk to the TSA security checkpoint. This walk, including navigating escalators or elevators to the upper departure level, takes about 3–5 minutes. Third, the TSA security screening time varies significantly by day and time. For standard lanes, average wait times range from 15 minutes during off-peak hours (e. , early morning before 6:00 AM or late evening after 9:00 PM) to 45 minutes during peak periods (e. , 6:00 AM–9:00 AM and 3:00 PM–6:00 PM). Passengers with TSA PreCheck or Clear can reduce this to 5–15 minutes. Therefore, the total estimated time from rental car drop-off to clearing security is between 26 minutes (best case) and 62 minutes (worst case). Travelers are strongly advised to allow at least 90 minutes for domestic flights and 2 hours for international flights to account for unexpected delays.