Updated January 5, 2026
Know before you go. Stay up to date on airport construction and how it might impact your journey.
Current construction impacts
| PROJECT | IMPACTED AREA | IMPACT DESCRIPTION |
|---|---|---|
| C Concourse Expansion | Checkpoint 5 CLOSED | Starting Tuesday, Jan. 6, 2026, Checkpoint 5 will close for approximately 5 weeks. Work is happening on the secure side to the flooring/terrazzo work along the C and D Concourses. TSA security screening lanes will be accommodated at other checkpoints. Visit the Security webpage for more information. |
| C Concourse Expansion | C and D Concourse corridors | Temporary barricades have been erected creating narrower hallways along the C and D concourses. Crews for the CCE project are working on terrazzo flooring replacement. Barricades will come down in mid-February. |
*all dates and times are subject to change
Resources
- Check Upgrade SEA to learn more about current and future airport improvements
- Get step-by-step directions throughout the airport and see available routes, detours and more on our interactive map
