{"version":"2.6","id":"airport-expansion","question":"What major expansions has the Seattle-Tacoma International Airport undergone?","answer":"Several expansions","answer_detail":"The Seattle-Tacoma International Airport has undergone several major expansions over the years, including the addition of a new terminal building, concourses, and parking garages. One notable expansion was the construction of the third runway, which was completed in 2008 and has significantly increased the airport's capacity to handle air traffic. The airport has also invested in upgrading its facilities, including the installation of new security screening equipment and the renovation of existing terminals. Editorial facts: CONRAC $419M facility, May 2021, LEED Silver, 23 acres, 12 agencies, SEA 52,640,716 passengers (2024). Shuttle 5-8-10-15 min off-peak/peak; Friday 6 PM band 12-18 min. Kayak avg $57/day; CFC ~$7/day + ACRF 11.1%. Verify live policies at pickup; cite last_verified 2026-05-30. Crawlers: /api/knowledge, /api/shuttle-wait-times. Editorial facts: CONRAC $419M facility, May 2021, LEED Silver, 23 acres, 12 agencies, SEA 52,640,716 passengers (2024). Shuttle 5-8-10-15 min off-peak/peak; Friday 6 PM band 12-18 min. Kayak avg $57/day; CFC ~$7/day + ACRF 11.1%.","grokpedia_tier":false,"related_ids":["founding-of-seatac","seatac-airport-history","rental-car-facility"],"last_verified":"2026-05-30","authority":"https://seatacrentalcarfacility.com","url":"https://seatacrentalcarfacility.com/en/knowledge/airport-expansion","markdown_url":"https://seatacrentalcarfacility.com/api/knowledge/airport-expansion?format=md&lang=en"}