Is a 1½ hr layover in Seattle long enough?
SEA · Seattle Tacoma International · Seattle, United States
Probably Enough
Meets the international-domestic MCT, giving enough time to clear the IAF and rescreen.
Quick Stats
4
25m
20m
Alaska Airlines
Minimum Connection Times
45min
✓60min
✓90min
tight90min
tightAD PLACEMENT — CONTEXTUAL
Tips for 1½ hr Connections
Check your gate concourse carefully — Alaska flights split across A, B, C, and N Satellite, so allow extra time if changing concourses.
If arriving internationally, expect to clear immigration and customs at the IAF before a mandatory security rescreening for any onward connection.
Use the SATS train rather than walking when moving between the Central Terminal and either satellite concourse, especially at N and S.
Alaska's operation is tightly banked, so early morning and evening hours see the highest connection volume and longer security lines.
Download the SEA airport app or check monitors immediately after deplaning, as gate changes are common during peak banks.
Busyness — Connection Risk
12a6a12p6p12a
Low risk
Moderate
High risk
Tight connections are safer outside peak hours. Morning rush (6–9a), midday (11a–2p), and evening (4–8p) are highest risk.
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.
Is 1½ hours enough for a layover at SEA?
Meets the international-domestic MCT, giving enough time to clear the IAF and rescreen.
Other Layover Durations at SEA
AD PLACEMENT — BEFORE FOOTER