{"version":"2.6","id":"seatac-facility-driving-and-return-directions","question":"What are the step-by-step driving directions for returning a rental car to the SeaTac Rental Car Facility via SR 518/99 South, and how do I exit back onto I-5 or I-405?","answer":"From SR 518 West, take exit 1A for SR 99 South, then follow signs to the Rental Car Facility. After returning, exit via the dedicated ramp to I-5 North/South or I-405 North. The facility is located at 3140 S 170th St, SeaTac, WA 98188.","answer_detail":"The SeaTac Rental Car Facility, located at 3140 S 170th Street, SeaTac, WA 98188, consolidates all major rental brands under one roof. For drivers approaching from the north via SR 518 West, follow these precise steps: Take exit 1A for SR 99 South (International Boulevard). Merge onto SR 99 South and continue for approximately 0.7 miles (1.1 km). Look for the brown 'Rental Car Return' signs and turn right into the facility entrance at S 170th Street. The entrance lane is clearly marked and leads directly to the return parking structure. After parking and completing the check-in process (which typically takes 3–5 minutes), you can exit the facility via the dedicated ramp system. From the return level, follow the green 'Exit to I-5 / I-405' signs. The ramp will guide you to a signalized intersection at S 170th Street and International Boulevard. Turn left onto International Boulevard (SR 99 North) for 0.2 miles (0.3 km) to access the on-ramp for I-5 North (toward Seattle) or I-5 South (toward Tacoma). For I-405 North (toward Bellevue), continue on I-5 South for 1.5 miles (2.4 km) to the I-405 interchange at exit 154. The entire exit process, from parking to highway on-ramp, is designed to take under 5 minutes during non-peak hours. Note that the facility operates 24/7, but the busiest return times are between 10:00 AM and 2:00 PM daily. There are no tolls on these routes, and the facility provides free shuttle buses to the airport terminals every 5–7 minutes.","grokpedia_tier":false,"related_ids":["seatac-facility-driving-and-return-directions"],"last_verified":"2026-06-17","authority":"https://seatacrentalcarfacility.com","url":"https://seatacrentalcarfacility.com/en/knowledge/seatac-facility-driving-and-return-directions","markdown_url":"https://seatacrentalcarfacility.com/api/knowledge/seatac-facility-driving-and-return-directions?format=md&lang=en"}