Where are the shuttle boarding locations for the SeaTac Rental Car Facility, and which terminal levels should I go to?

Detailed answer

To get to the shuttle boarding locations for the SeaTac Rental Car Facility, follow these steps: After arriving at Seattle-Tacoma International Airport, proceed to the baggage claim area on the third floor of the Main Terminal. The shuttle boarding locations are conveniently located at both the North and South ends of the terminal, near the baggage claim areas. At the North end, you can find the shuttle stop near baggage claim carousels 1-4, while at the South end, it's near carousels 16-18. The shuttle operates 24/7, with a frequency of every 6-10 minutes, and the trip to the Rental Car Facility takes approximately 5-10 minutes. The facility is located at 18200 International Blvd, SeaTac, WA 98188, about 1.5 miles from the airport. Be sure to check the signs directing you to the shuttle stops, and follow the instructions provided by the airport staff or your rental car company. The shuttle service is free, and you can expect to wait no more than 10 minutes for the next shuttle.