How do I return my rental car to the SeaTac Rental Car Facility from major highways?

To return your rental car to the SeaTac Rental Car Facility, follow these detailed directions from major highways. If you're coming from I-5, take the SR 518 West exit. Continue on SR 518 West for approximately 2. Then, take the SR 509 exit towards International Blvd / SR 99 South. Use the far-right exit lanes and follow the blue 'Rental Car Return' signs. You'll be directed into the facility, which is located at 18200 International Blvd, SeaTac, WA 98188. The return process typically takes around 10-15 minutes, depending on traffic. If you're coming from SR 509 or I-405, you can also follow the blue 'Rental Car Return' signs, which will guide you to the facility. The rental car return area is open 24/7, and the facility is equipped to handle a large volume of returns. Be sure to follow the signs and use the designated return lanes to avoid any confusion or delays. The facility is approximately 0. 5 miles from the SR 99 South exit off SR 518 West.