SEA
Seattle-Tacoma International Airport
Practical guidelines for Seattle-Tacoma International Airport — security, bags, and connections. Take the full checklist offline in the app.
Security
TSA screening
Main and North checkpoints. PreCheck available. Peak morning Alaska banks get busy.
customs
International arrivals
International Arrivals Facility processes most overseas flights.
Baggage
Baggage
Alaska Airlines hub. Oversized bag counters near check-in.
transit
Concourses
A–N concourses linked by walkways and trains. Build buffer for N gates.
Check-in
Check-in
Alaska check-in dominates the main terminal. Online check-in opens 24h ahead.
boarding
Boarding
Gate changes are common in peak banks — recheck boards.
facilities
Lounges
Alaska Lounges plus The Club and Priority Pass. Free Wi-Fi.
local rules
Local rules
REAL ID for domestic. Washington sales tax on purchases.
Fly prepared — on your phone
Full SEA profile, boarding-pass checklist, and AI coach offline.