Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
UNITED · FLIGHT UA 2136
SCHEDULED · TYPICAL SCHEDULE
UA 2136 · BOS → IAD
departs 7:27 PM ET · arrives 9:16 PM ET
Forecast issued Wed 9:00 PM ET · 46h before departure
Odds over time
Arrive at IAD more than 15 minutes late?
53%
chance · ±10 pts
+25 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
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How late will it get to IAD?
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On time or early
46%
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15–30 min late
6%
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30 min–1 hour late
16%
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1–2 hours late
18%
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Over 2 hours late
12%
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Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.