QUICK ANSWER
Find the arrival and departure concourses before choosing a train or walking route.
01
N/S gates
Use SEA Underground when the route includes North or South satellite gate areas.
02
International arrival
Passport control, baggage and re-check procedures can add major time before an onward connection.
03
Self-transfer
On separate tickets, verify baggage transfer and airline check-in deadlines yourself.
Frequently asked questions
Are SEA gates connected after security?
Yes, SEA says all airline gates are accessible after security.
What adds time on an international connection?
Passport control, baggage handling and any required re-screening can materially reduce usable connection time.
✓
Sources and verification
Time-sensitive airport, airline, visa, security and transport details should always be confirmed with the relevant official source before travel.