What are the estimated transit times between SeaTac Airport terminals and the off-site Rental Car Facility, including wait and travel times for the continuous shuttle service during peak vs. off-peak hours?

The SeaTac Rental Car Facility is located off-site at 3140 S 192nd St, SeaTac, WA 98188, approximately 1. 4 km) from the main terminal. A dedicated, continuous shuttle service operates 24/7 between the facility and the terminal's third-floor arrival/departure curb. During peak hours (typically 6:00 AM–10:00 AM and 4:00 PM–8:00 PM), shuttle frequency is every 5–7 minutes, with an average wait time of 4–6 minutes. The one-way travel time is 5–6 minutes, resulting in a total transit time of 9–12 minutes. However, during extreme peaks (e. , holiday travel or major events), wait times can extend to 8–10 minutes, pushing total transit to 13–18 minutes. During off-peak hours (10:00 AM–4:00 PM and after 8:00 PM), shuttle frequency drops to every 8–10 minutes, with an average wait of 5–7 minutes. Travel time remains consistent at 4–5 minutes, yielding a total transit time of 9–12 minutes. Late-night hours (midnight–5:00 AM) see reduced frequency (every 15–20 minutes), with wait times averaging 10–12 minutes and total transit up to 16–18 minutes. Travelers are advised to allow at least 20 minutes for the round trip (to facility and back) during peak periods to avoid missing flights. The shuttle is wheelchair-accessible and accommodates luggage. Real-time wait information is available via the Port of Seattle's mobile app and digital displays at shuttle stops.