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SEASeattle·Seattle Tacoma International·Seattle, United States
How long is your layover?
30 min45 min1 hr1¼ hr1½ hr2 hr2½ hr3 hr4 hr
Recommended minimum1 hour
Quick Stats
Concourses
4
Central Terminal (Concourses A, B, C, D), North Satellite (Concourse N), South Satellite (Concourse S), International Arrivals Facility (IAF)
Max Transit
25m
via walking
Avg. Security
20m
~10m with PreCheck
Primary Hub
Alaska Airlines
Minimum Connection Times
Domestic → Domestic
45min
Domestic → International
60min
International → Domestic
90min
International → International
90min
Seattle skylinePhoto by Willian Justen de Vasconcellos on Pexels
AD PLACEMENT — CONTEXTUAL
Getting Between Concourses
The Satellite Transit System (SATS), an underground automated train, connects the Central Terminal to both the North and South Satellites in about 2-3 minutes of ride time, though walking to and from platforms adds more. Concourses A through D in the Central Terminal are linked by a long connected walkway. International arrivals processed at the IAF (adjacent to Concourse A/South Satellite) require passing through Global Entry/CBP and, for onward connections, a rescreening security checkpoint before continuing to domestic gates.
Busyness — Connection Risk
12a6a12p6p12a
Low risk
Moderate
High risk
Key Facts
Train-linked satellite concourses
Alaska Airlines mega-hub
International rescreening required after IAF arrival
Efficient but bank-driven congestion
Airlines at SEA
Alaska AirlinesDelta Air Lines
Common Questions
Is 30 minutes enough for a layover at SEA?

Still well under minimum connect time, especially risky if changing between satellite concourses. See full 30 min guide →

Is 45 minutes enough for a layover at SEA?

This matches the domestic-domestic MCT but assumes no delays and adjacent gates. See full 45 min guide →

Is 1 hour enough for a layover at SEA?

Comfortable for domestic connections and meets the minimum for domestic-to-international transfers. See full 1 hr guide →

Is 1 hour 15 min enough for a layover at SEA?

Solid buffer for any domestic pairing and workable for most international-inbound connections. See full 1¼ hr guide →

Is 1½ hours enough for a layover at SEA?

Meets the international-domestic MCT, giving enough time to clear the IAF and rescreen. See full 1½ hr guide →

Is 2 hours enough for a layover at SEA?

Ample time for any connection type, including international-to-international via the IAF. See full 2 hr guide →

Is 2½ hours enough for a layover at SEA?

Very comfortable, allowing for unexpected delays in customs or gate changes. See full 2½ hr guide →

Is 3 hours enough for a layover at SEA?

Well beyond any operational requirement, ideal even during peak Alaska banks. See full 3 hr guide →

Is 4 hours enough for a layover at SEA?

Excessive for a normal connection, enough time to leave security and return if desired. See full 4 hr guide →

Other Airport Guides
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AD PLACEMENT — BEFORE FOOTER