Pet relief areas at Seattle-Tacoma International Airport (SEA)

Before or after security?

For a layover, you need an airside (post-security) area — you usually cannot re-clear security.

Where exactly

• 📍 Concourse A, near Gate A10 (airside)
• 📍 Concourse D, at the restrooms near D1 (airside)
• 📍 Concourse S, at the S underground train station (airside)
• 📍 Concourse N, at the N underground train station (airside)
• 📍 International Arrivals Facility, Mezzanine level in the customs area (airside, arriving international passengers only)
• 📍 Outside Door 33, Departures level, north end (landside)
• 📍 Outside Door 26, Arrivals drive, north end (landside)
• 📍 Baggage claim level, south end past Carousel 1 (landside)