How do I access the SeaTac Rental Car Facility from local freeways and return to I-5 or I-405?

To access the SeaTac Rental Car Facility from local freeways, drivers can take several routes. From the north, take I-5 South and exit onto SR 518 West towards SeaTac. Continue on SR 518 West for approximately 4. 5 miles, then take the exit for International Boulevard/Pacific Highway South. Follow the signs for Rental Car Return, which will direct you to the facility. The trip should take around 15-20 minutes depending on traffic. From the south, take Highway 99 North/Pacific Highway North and exit onto SR 509 North. Continue on SR 509 North for about 2. 5 miles, then merge onto I-5 North. Take the exit for SR 518 West and follow the same directions as above. Upon returning to the facility, follow the signs for Rental Car Return, which will guide you through the return lanes. The facility is open 24/7, and the return process typically takes less than 5 minutes. The address is 18200 International Blvd, SeaTac, WA 98188.