The following organizations and officials have endorsed the SCAA Resolution opposing further expansion of Sea-Tac Airport:

• The Seattle Community Council Federation
• Central Area Neighborhood District Council
• Columbia City Revitalization Committee
• RCAA (Regional Commission on Airport Affairs), with modification
• JAWS (Jet Airplane Watchdogs of Seattle)
• C.A.N.E. (Citizens for Airplane Noise Equity)
• South Beacon Hill Community Council
• Jackson Place Community Council
• Miller Park Neighborhood Association
• Magnolia Community Club
• Eastlake Community Council
• Cherry Hill Community Council
• Leschi Community Council
• Madrona Community Council
• Capitol Hill Community Council
• Georgetown Community Council, with modification
• Squire Park Community Council, with modification
• Seward Park/Lakewood Community Club
• Mt. Baker Community Club, with modification
• Hawthorne Hills Community Council
• Medina City Council, with modification
• Airport Communities Coalition
• Roosevelt Neighborhood Alliance
• N.E. Neighborhood District Council
• Laurelhurst Community Club
• ECAAN (Eastside Citizens Against Aircraft Noise)
• Normandy Park City Council
• City of Burien
• State Representative Karen Keiser
• State Senator Julia Patterson
• State Senator Dow Constantine
• State Senator Adam Kline
• State Representative Sharon Tomiko Santos
• State Representative Kip Tokuda
• Greater Madison Valley Community Council