Is a 2h 30m Layover Enough at IAD?
Washington Dulles International — Washington
⚠️
Tight — 8% miss rate
Maybe — a 2 hours and 30 minutes layover at IAD is tight but doable.
8%
Miss Rate
82%
On-Time Rate
74m
Avg Delay
Why 150 Minutes Is Tight at IAD
Your 150-minute connection at IAD is doable but doesn't leave much margin for error. If your first flight is more than 90 minutes late, it could get stressful.
+Airport reliability: IAD has a 82% on-time rate — above average
+Comfortable buffer: Your 150-minute layover is well above the 60-minute minimum
−High average delay: When flights are late at IAD, the average delay is 74 minutes
−Long taxi times: Planes at IAD typically sit on the runway for 20 minutes before takeoff
Minimum Connection Time at IAD
60m
Domestic
120m
International
Your 150-minute layover gives you 90 minutes of buffer above the 60-minute domestic minimum. That's a comfortable buffer for most situations.
Terminal Transfers at IAD
How to transfer: AeroTrain automated people mover connects the main terminal to all concourses
Transfer time: 5-12 minutes between concourses via AeroTrain
✓TSA re-screening: Not required between terminals — All concourses are connected post-security via the AeroTrain. International arrivals can connect to domestic flights without re-screening.
Compare Other Layover Times at IAD
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What to Do Instead
- →Look for itineraries with 141+ minute layovers at IAD
- →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
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