How do I return my rental car to the SeaTac Rental Car Facility via the freeway?

To return your rental car to the SeaTac Rental Car Facility, you can take several freeway routes. If you're coming from the north, take I-5 South and stay in the right-hand lanes. As you approach the facility, you'll see signs directing you to the Rental Car Return. Take the exit for Highway 99 South/Pacific Hwy South, which is approximately 2 miles from the I-5 and SR-518 interchange. Continue on Highway 99 South for about 1. 5 miles, staying in the right-hand lanes to access the facility entrance. The return facility is located at 18200 International Blvd, SeaTac, WA 98188. If you're coming from the east, take SR-518 West and merge onto I-5 South. Follow the same directions as above. If you're coming from the south, take I-5 North and exit onto SR-509 North. Take the exit for Highway 99 South/Pacific Hwy South and follow the signs to the Rental Car Return. The entire process should take around 10-15 minutes depending on traffic. Be aware that there is a return fee of $4. 50 for vehicles returned between 11 PM and 5 AM.