• 18-120 DailyFTMbyFlow_Page_01

    Port of Seattle flight track map showing aircraft operations at Seattle-Tacoma International Airport on March 1, 2018, during South Flow operations only. The map displays arrivals (red), departures (green), and overflights (blue) with South Flow accounting for 87% of operations (953 flights) and North Flow 13% (145 flights).
  • 18-120 DailyFTMbyFlow_Page_10

    Port of Seattle flight track map depicting aircraft operations at Seattle–Tacoma International Airport on March 6, 2018, showing North Flow Operations Only. On that date, North Flow accounted for 90% of operations (991 flights) and South Flow 10% (115 flights), with departure tracks shown in green and arrival tracks in red.
  • 18-120 DailyFTMbyFlow_Page_09

    Port of Seattle flight track map depicting aircraft operations at Seattle-Tacoma International Airport on March 6, 2018, showing South Flow operations only. The map indicates arrivals (red), departures (green), and overflights (blue), with South Flow comprising 10% (115 operations) and North Flow comprising 90% (991 operations) of that day's traffic.
  • 18-120 DailyFTMbyFlow_Page_08

    Flight track map produced by the Port of Seattle depicting all aircraft operations at Seattle-Tacoma International Airport on March 5, 2018, during South Flow operations only (1,117 total operations, 100% South Flow). The map shows arrival tracks in red and departure tracks in green overlaid on a Bing/HERE base map of the greater Seattle-Tacoma region.
  • 18-120 DailyFTMbyFlow_Page_13

    Flight track map produced by the Port of Seattle depicting aircraft operations at Seattle-Tacoma International Airport on March 8, 2018, showing South Flow Operations Only (100%, 1,125 operations) with zero North Flow operations. The map distinguishes arrivals (red), departures (green), and overflights (blue) over the greater Seattle-Tacoma area.
  • 18-120 DailyFTMbyFlow_Page_12

    Port of Seattle flight track map depicting aircraft operations at Seattle-Tacoma International Airport on March 7, 2018, showing North Flow Operations only. Green lines indicate departures, red lines indicate arrivals, and blue lines indicate overflights; North Flow accounted for 86% of operations (948 flights) and South Flow 14% (159 flights).
  • 18-120 DailyFTMbyFlow_Page_11

    Port of Seattle flight track map depicting aircraft operations at Seattle-Tacoma International Airport on March 7, 2018, showing South Flow operations only. On that date, North Flow accounted for 86% of operations (948 flights) and South Flow 14% (159 flights), with arrival tracks shown in red, departures in green, and overflights in blue.
  • SR-509 surplus-cropped

    Satellite map of the Des Moines/SeaTac area south of Seattle showing marked approach corridors for Sea-Tac Airport runways 16C, 16L/34R, and the 3rd Runway at S 200th Street. A red polygon highlights a noise-impact or study zone extending southward through residential Des Moines roughly between S 216th Street and S 228th Street, near Barnes Creek Nature Trail and Des Moines Beach.
  • 2021-03-24

    Public comment on flight path dispersion for Sea-Tac Airport departures, Highline Forum meeting

    In a March 2021 public comment to the Highline Forum, Federal Way resident Bernedine Lund urged Sea-Tac Airport officials to request that the FAA disperse departure flight paths to reduce concentrated aircraft noise over residential areas. Drawing on examples from the 2021 Aviation Noise & Emissions Symposium, she highlighted how Charlotte Douglas International Airport successfully spread departure tracks from a 1.6-mile-wide corridor to 2.5 miles, and noted that similar tightly clustered flight paths exist over Federal Way. She pointed to FAA Reauthorization Act of 2018, Section 175, which allows airport operators—in consultation with affected communities—to formally request dispersal of departure procedures between the surface and 6,000 feet, provided the change does not increase noise over sensitive areas.
  • 2020-10-27

    Average number of Horizon Air Q400s proceeding on the westbound 250 degree turn over Burien during full north-flow days

    This October 27, 2020 document from Seattle-Tacoma International Airport tracks the average daily number of Horizon Air Q400 turboprop aircraft making a westbound 250-degree turn over the city of Burien during full north-flow operating days. Data from July and August of both 2019 and 2020 show daily overflight counts ranging from 10 to 22 aircraft, with monthly averages rising from 16 overflights per day in summer 2019 to 17–19 overflights per day in summer 2020. The records appear intended to document trends in aircraft noise exposure for residents living under that flight path.