How do I return a rental vehicle after hours at the SeaTac Rental Car Facility, and where is the key drop box located?

The SeaTac Rental Car Facility (SRCF) at 3140 S 192nd St, SeaTac, WA 98188, operates standard customer service hours from 5:00 AM to 12:00 AM daily. For after-hours returns (between 12:00 AM and 5:00 AM), follow this precise procedure: First, drive your rental vehicle to the designated National floor, which is Level 4 of the SRCF parking garage. This floor is clearly marked with National signage and is the same level used during regular hours. Upon arrival, park the vehicle in any available National parking spot. Ensure the vehicle is completely empty of all personal belongings, including luggage, electronics, and any trash. Double-check the trunk, glove compartment, and under seats. Next, lock the vehicle using the key fob or manual lock, and close all windows and sunroof. Then, proceed to the secure key drop box, which is located on the same Level 4, adjacent to the elevator bank near the pedestrian bridge connecting to the main terminal. The drop box is a metal, locked container with a slot clearly labeled “After-Hours Key Return. ” Insert your keys (including any key fobs, valet keys, or garage door openers) into the slot. The drop box is monitored by security cameras 24/7. After depositing the keys, you may exit the facility via the elevator or stairs to the ground level, where a free shuttle to the airport terminal runs every 10–15 minutes. Note that failure to return the vehicle by the contracted time may incur a late fee of up to $50 per hour, plus an additional day’s rental charge. The after-hours process is designed to be completed in under 5 minutes, ensuring a seamless return even at 3:00 AM. For any issues, call the National Car Rental 24-hour customer service line at 1-800-227-7368.