How do wheelchair services and ADA accessibility work on SeaTac Rental Car Facility shuttles?

Seattle-Tacoma International Airport (SEA) consolidates all 12 authorized rental agencies at an off-site Rental Car Facility (RCF) at 3150 S. , SeaTac, WA 98188. Free dedicated shuttle buses operate 24 hours a day, 365 days a year, with an average five-minute ride between the main terminal and the RCF. Passengers board on the baggage-claim level at two marked pickup zones: the north end near Alaska Airlines or the south end near international carriers. Returning shuttles load outside the RCF customer-service counters, with separate north-terminal and south-terminal routes. For ADA ground transport, every rental car shuttle is equipped with a deployable ramp, wheelchair securement anchors, and clearly marked priority seating near the front of the cabin. Each bus can safely transport one occupied wheelchair per trip. Notify the driver when you board and again before arrival if you use a mobility device or need continued assistance. After your shuttle ride, tell the driver before exiting if you need help reaching ticketing, gates, or rental counters. The driver contacts Prospect Airport Services—the Port of Seattle's on-site wheelchair operator—so an assistant can meet you at the drop-off curb. You may also call Prospect directly at (206) 246-1550 upon arrival. Terminal wheelchair escort is complimentary; airlines coordinate gate-to-gate and baggage-claim assistance when reserved in advance. RCF agencies offer hand-control vehicles at no additional charge with advance booking. Unresolved ADA concerns may be filed through the Port of Seattle ADA grievance form.