Updated May 18, 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 | C and D Concourse corridors | Temporary barricades have been erected creating slightly narrower hallways along the C and D concourses |
| Roadway Improvements | Arrivals Drive | Single lane closures from 5/18-22 between midnight and 8:30 a.m. to install overhead signage |
| Roadway Improvements | Departures Drive | Single lane closure on Departures Drive starting Wednesday, 5/20 at 8 p.m. to Thursday, 5/21 at 4:30 a.m. |
*all dates and times are subject to change
Resources
- Checkout Airport Capital Projects (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
