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Sustainable Airport Master Plan (SAMP)

Sea-Tac Airport’s annual passenger count is expected to substantially increase in the next 20 years. Sea-Tac must prepare for this growth and continue to invest in its infrastructure to keep its place as a premier international airport and fulfill its mission as an economic engine.

The Sustainable Airport Master Plan (SAMP) will develop a long-term blueprint for the future development of the airport over 5-, 10-, and 20-year timeframes.

What’s Coming?

Our airport is the fastest growing among the top 20 U.S. airports, serving more than 42 million passengers in 2015. During 2014-2015, Sea-Tac welcomed more than 7 million additional passengers, nearly matching the previous 10 years’ increase in just two years. In 2034, forecasts project Sea-Tac will reach:

  • 66 million annual passengers (an increase of 24 million from 2015)
  • 540,000 annual operations (up from 350,000 in 2014)

Long-term Blueprint for Development

The SAMP aims to meet the needs of the airport’s customers by forecasting future demand and the projects required to meet that demand, with a strong emphasis on sustainability. Focus areas of the SAMP include airfield enhancements within the current three-runway configuration, terminal development and potential expansion, roadway improvements and cargo facility modernization. Based on forecasts, Sea-Tac Airport requires:

  • 35 additional aircraft gates (Sea-Tac currently has 88)
  • 16 additional international wide-body capable aircraft gates (Sea-Tac
    currently has 11)
Map of Sea-Tac Airport properties. Click on the image to enlage.

What is the
Sea-Tac Airport Master Plan?

Why do we need a master plan?
Find out in the
SAMP Brochure

Join the Conversation

Throughout 2016, the Port of Seattle will continue to provide information and gather input about the Master Plan.
To be notified when new open houses are scheduled, sign up here to receive email updates by clicking on the Sustainable Airport Master Plan (SAMP) box.
To view presentation materials from the events above, please scroll to the bottom of this page. 


Sea-Tac is the first large hub airport in the U.S. to fully incorporate sustainability as a key component of its master planning effort. This includes reducing environmental impacts, ensuring economic performance, and working collaboratively with local communities. As this planning process develops, sustainability criteria will be used to evaluate and develop future alternatives for growth.

Airside, Terminal and Landside

With the increasing growth in passengers and flights, Sea-Tac is evaluating opportunities and challenges within all three airport operational areas: airfield, terminal, and landside (parking and roadways). The SAMP process will culminate in a capital improvement program and financing plan that will deliver the airfield, terminal, and landside projects needed to relieve congestion and provide a high level of service to the airport’s customers. 

 Map of preliminary Sea-Tac Airport future land uses. Click on the image to enlarge.

Community Engagement

The SAMP public engagement effort is aligned with key project milestones and designed to keep the public informed as the SAMP develops.

Each open house is intended to make it easy for the public to learn more, provide input and ask questions.

To keep up-to-date throughout the SAMP process and to be notified when new open houses are scheduled, sign up on the port’s website to receive email updates by clicking on the Sustainable Airport Master Plan (SAMP) box.

Major Components and Timeline

Click on the image to enlarge.


Staff briefings to Commission
Oct. 7, 2014: Activity Forecast and Facility Challenges
Jan. 27, 2015: Facility Goals and Development Options
Feb. 10, 2015: Strategy for a Sustainable Sea-Tac
March 24, 2015: Sea-Tac Air Cargo
April 28, 2015: SAMP Planning Update
Sept. 8, 2015: SAMP Planning Update
Jan. 26, 2016: SAMP Planning Update
April 12, 2016: SAMP Plan Briefing
July 12, 2016: SAMP Plan Briefing
 Public outreach events
From Spring 2016 Public Open Houses:
Material covered in the boards includes:
  • What a sustainable master plan is and the plan schedule, pp. 4-5
  • Potential airfield improvements, p. 6
  • Major plan concepts and a comparison of the options, pp. 8-13
  • Potential mid-term improvements, pp. 14-15
  • Sustainability, p. 16
  • Future airport land use, p. 17
  • Economic development, p. 18 
From Spring 2015 Public Open Houses: