Is a 30-Minute Layover Enough at SEA?
Seattle-Tacoma International — Seattle
🔴
High Risk — 50% miss rate
Probably not — a 30 minutes layover at SEA means roughly a 50% chance of missing your flight.
50%
Miss Rate
81%
On-Time Rate
58m
Avg Delay
Why 30 Minutes Is High Risk at SEA
A 30-minute connection at SEA is very risky. There's roughly a 50% chance you'll miss your connecting flight. We strongly recommend at least 115 minutes, or consider booking a direct flight.
·Airport reliability: SEA has a 81% on-time rate
−Below minimum connection time: SEA requires at least 55 minutes for domestic connections. You have 30.
−High average delay: When flights are late at SEA, the average delay is 58 minutes
−Long taxi times: Planes at SEA typically sit on the runway for 20 minutes before takeoff
Minimum Connection Time at SEA
55m
Domestic
120m
International
Your 30-minute layover is 25 minutes below the domestic minimum. Even without any delays, you may not have enough time to reach your gate.
Terminal Transfers at SEA
How to transfer: Underground train connects main terminal to North Satellite; walking to South Satellite
Transfer time: 5-12 minutes between most areas
✓TSA re-screening: Not required between terminals — All concourses and satellites are connected post-security. No re-screening needed for any domestic or international connection.
Compare Other Layover Times at SEA
Click any row to see the full analysis for that layover time.
What to Do Instead
- →Look for itineraries with 115+ minute layovers at SEA
- →Consider a direct flight if available
- →Book both legs on the same ticket (airline must rebook you if you miss the connection)
- →Choose an early morning first leg — morning flights are delayed less often
Check a Different Layover Time
Enter your exact connection time for a personalized assessment.