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STNI

STNISea-Tac Noise.Info

  • Solve for Sea-Tac. Solve for every airport.
  • Since 2016, working to obtain justice for everyone living under the flight path.
  • Less Noise. Cleaner Air. Better Public Health. Compensation.
  • Everything you think you know about the airport is wrong.

TagAirport Expansion(165)

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  • Ntnnp social media3
    2026-09-08

    Night trains, not night planes

    Social media graphic jointly published by Stay Grounded and Back-on-Track.eu (European network to promote cross-border night trains) for a September 13th campaign. The image promotes night trains as an alternative to night flights, featuring a crossed-out airplane and a modern passenger train, with the hashtag #RedLinesForAirports. Advocates for reducing aviation in favor of rail travel
    TagsAirport Expansion, non-aviation transportation, Railroads, Stay-GroundedFolderStay Grounded
  • Highlineschoolboardofdirectors 2026 1
    2026-08-18

    Highline School Board Calls for Protections, Investment as Airport Expansion Moves Forward

    Highline School Board Calls for Protections, Investment as Airport Expansion Moves Forward Aug 19 2026 The Highline Public Schools Board of Directors voted unanimously to submit a letter to the Port of Seattle calling for stronger protections and greater investment in schools and communities affected by plans to expand Seattle-Tacoma International Airport. In the letter,
    CategoriesCorrespondence, From The Web, Press Release TagsAirport Expansion, community engagement, Highline Schools, Noise Mitigation, Port Of Seattle Commission
  • August 11, 2026 upgradesea sce concourselevellookingeast 1500x844 web
    2026-08-10

    SEA Airport Moves Forward with Next Major Renovation: S Concourse

    August 11, 2026 The Port of Seattle Commission authorized initial funding today for the next significant modernization project at Seattle-Tacoma International Airport (SEA) — the S Concourse Evolution (SCE) — with major construction scheduled to start in 2027. As part of the $5.5 billion Upgrade SEA capital improvement program, the estimated $2.5 billion S Concourse
    CategoriesFrom The Web TagsAirport Expansion, Construction, Port Of Seattle Commission, Sea-Tac Airport
  • Stcp chapter 431 pg 13 distance and flight times from seattle to major world cities and major us cities

    STCP Chapter 4.3.1 — Bar Charts: Distances and Flight Times from Seattle to Major World Cities and Major US Cities

    Document POS 671 (page 4.3.1/13) contains two bar charts showing distances in statute miles and flight times in hours from Seattle to major world cities (including Berlin, Buenos Aires, Hong Kong, Johannesburg, London, Manila, Melbourne, Mexico City, Moscow, Oslo, Paris, Quebec, Rio de Janeiro, Rome, Tokyo, and Vancouver B.C.) and major U.S. cities (including Atlanta, Anchorage, Chicago, Dallas, Denver, Detroit, Juneau, Los Angeles, Minneapolis, New Orleans, New York, Portland, San Francisco, and Washington D.C.).
    TagsAirport Expansion, Sea-Tac Airport, STCPFoldermaps
  • UpgradeSEA map Upgrademain
    2026-04-23

    Upgrade SEA Airport Improvement Map

    An aerial overview of Seattle-Tacoma International Airport annotated with labeled capital improvement projects under the 'Upgrade SEA' program, including C Concourse Expansion, S Concourse Evolution, Concourse A Building Expansion for Lounges, SEA Gateway, Main Terminal Improvements Program, Baggage Optimization, Checkpoint 1 Relocation, Automated Parking Guidance System, Restroom Renovation, Roadway Improvements, Curbside Accessibility and Safety, and SEA Underground Controls Replacement. The Upgrade SEA diamond logo is visible in the lower left corner.
    TagsAirport Expansion, capital improvements, Map, Sea-Tac AirportFolderSea-Tac Airport
  • 2026-01-16

    The Economics of Air Transport in Europe Part One: Air Transport and Growth

    A research report examining the relationship between air transport and economic growth in Europe, analyzing where and when aviation expansion might drive economic benefits. The study includes a review of air travel as an economic enabler and develops a typology of air transport-economy relationships across European regions.
    TagsAirport Expansion, UECNAFolderGroups
  • Cd9464C39116769B1F1C213A3A63Bc935C5B889E

    D.C. Circuit Court of Appeals Cracks Down on FAA Compliance with NEPA

    A legal article categorized under 'Aviation & Airport' reports that the D.C. Circuit Court of Appeals cracked down on FAA compliance with NEPA (National Environmental Policy Act). The publication appears to be from a legal news outlet with a red 'IL' or 'JL' logo.
    CategoriesLitigation, News Stories TagsAirport Expansion, Airport Law, Airport Noise Law, ANCA, Aviation Committees, Aviation EmissionsFolderFAA
  • Djc Third Runway Banner

    Sea-Tac Airport third runway project banner

    A stylized graphic depicting an airplane silhouetted against a sunset sky approaching a runway lined with approach lights. The text 'Sea-Tac Airport Third Runway' is displayed prominently, indicating this image relates to the third runway project at Seattle-Tacoma International Airport.
    TagsAirport Expansion, Runways, Sea-Tac Airport, Third RunwayFolderThird Runway
  • 2025-10-28

    Airport Capital Spending (2025 $)

    A line graph showing CPI-adjusted airport capital spending in millions of 2025 dollars from 1998 through 2030 (with years 2025–2030 as forecasts), alongside a flat orange reference line representing average real spending from 1998–2024 at approximately $470 million. Spending peaked around 2002–2005 near $800 million, dropped to a low near $125 million in 2012, recovered to approximately $750 million by 2018–2019, and is forecast to peak near $975 million around 2027 before declining.
    CategoriesExplainers TagsAIP, Airport Expansion, Airport Improvement Program, Budget, capital improvements, Forecast, Sea-Tac AirportFolderStatistics
  • 2025-08-12

    Sea-Tac Airport 2025 Capital Expenditures Financial Summary — RM Packet Page 252

    A financial summary table from what appears to be a Seattle-Tacoma International Airport board or budget report (page 252 of 292) detailing 2025 capital expenditures, showing projects including C Concourse Expansion, SEA Gateway, Post IAF Airline Realignment, and others, with total spending of approximately $806.9M forecast against a $816.3M budget. Footnotes explain variances for each major project.
    TagsAirport Expansion, Budget, capital improvements, Port Of Seattle, Sea-Tac AirportFolder2025-Q2

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Upcoming Events

  • Burien Airport Committee Meeting September 15, 2026
    Add to CalendarMTuesday Sep 15: 6:00pm
    400 SW 152nd St, Burien, WA 98166
    Burien airport committee 15 sep 2026 agenda pdf pdf

    a) Part 150 Noise Study (Emily Inlow-Hood) — 15 minutes
    b) SAMP Update and Next Steps (Brian Davis and Sarah Moore) — 15 minutes
    c) Legislative Updates — 10 minutes
       • SCA (Sarah Moore)
       • Work with Sen. Orwall (Brian Davis)
    d) StART Reorganization (Jeff Harbaugh and Karen Veloria) — 10 minutes

    [...]

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Issues

Sea-Tac Airport is currently undergoing the largest and longest expansion in its history, collectively known as the Sustainable Airport Master Plan (SAMP). Some of it you can already hear, but you’re probably not aware of what it all means. Here’s what you need to know.
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Read This!

As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.
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